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ElementBox: detailed survey of GTK layout code (see #1235)

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Investigate how the GTK implementation allocates size extension
to widgets and child widgets; identify possible extensions points
and work out a solution strategy to make GTK observe our specific
size constraints, which are derived from a time calibrated canvas.
This commit is contained in:
Fischlurch 2022-09-24 02:41:11 +02:00
parent 0f3298f004
commit c439ade3da
2 changed files with 749 additions and 175 deletions
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18
wiki/renderengine.html
View file

@ -3217,7 +3217,7 @@ In accordance with this structure, we introduce a central component, the {{{Pane
</pre>
</div>
<div title="GuiElementBoxWidget" creator="Ichthyostega" modifier="Ichthyostega" created="201811011919" modified="202209011727" tags="GuiPattern spec draft" changecount="6">
<div title="GuiElementBoxWidget" creator="Ichthyostega" modifier="Ichthyostega" created="201811011919" modified="202209240032" tags="GuiPattern spec draft" changecount="10">
<pre>//A building block used pervasively throughout the Lumiera UI to represent a named entity.//
This widget presents a horizontally extended body, which holds a characteristic ''Head-Triplet'' of visual Elements:
* an //Icon// to create the visual anchor point. In many cases, this will be ''the Placment Icon'' (a hallmark of Lumiera's UI)
@ -3282,6 +3282,22 @@ This behaviour pattern (see [[#1186|https://issues.lumiera.org/ticket/1186]]) is
''Technically'', this has to be build as a self-contained component, which can be unit-tested. The input and reference is a &quot;Window&quot; (in fact an interval) together with its start position //relative// to the element's own start position. The component has to derive from this input the actual relational configuration of the window's extension with respect to its own extension. For context, the //window// corresponds to the visible area, which can be larger, smaller disjoint, partially overlapping and fully contained. Please note that ''handling the relations of intervals is a notoriously challenging problem.''
Especially when the component determines a placement of the //window// within its own extension, it has to derive a proportional placement position, which can be used to arrange the head-triplet of the {{{EventBoxWidget}}}. This proportional placement needs to reflect the location of the window within the overall extension, similar to the hand of a scrollbar. However, when the extension of the head-triplet, together with its placement disallows to show the the triplet unclipped, the triplets shall just be clipped naturally. Ideally, there would be a soft graceful transition between those two representation modes.
!!!constrained Widget size
When used as Clip display on a timeline canvas with calibrated time axis, the requirement arises to confine a GTK widget to a pre established size constraint. This requirement is problematic, as it stands in ''direct contradiction'' to ''GTK's fundamental design'': Elements are never to be positioned explicitly, but rather the layout will flow into balance, factoring in the specific font, language support and interface styling and theming. GTK does not provide any API to set layout explicitly — not even for special corner cases.
Thus, if we intend to bring a custom widget into compliance with our contextual size constraints, the only solution is to //make the GTK layout engine turn out the desired extension allocation// for this custom widget. An detailed survey of the GTK implementation reveals the possible extension points, were such a layout manipulation could be injected.
* some amount of screen extension is allocated by the framework or by a container widget for its children
* this happens on first &quot;realisation&quot; of the Widget, or later, when a resize request is processed and the layout cache invalidated
* the entry point is {{{Gtk::Widget::size_allocate()}}} (possibly with an additional &quot;baseline&quot; value)
* the implementation first queries the widget for its preferences
*# first, the layout trend is determined: either width-for-given-height, or height-for-given-width
*# then, the widget is queried for its preference in the leading dimension
*# followed by a call to the widget's width-for-given-height, or height-for-given-width implementation
* the resulting desired (&quot;natural&quot;) size allocation is then adjusted by widget decoration and finally passed to the widget for storage and use
It turns out that the GTK layout management implementation always observes the widget's preferred extension, but possibly expands the allocation to fill additional space. And the standard implementation of {{{Gtk::Widget}}} in turn delegates those queries to the ''GTK CSS Gadget'' — which is a mapping of the hierarchical widget structure into CSS layout nodes.
So the seemingly ''optimal leverage point'' is to ''return our pre established size constraint as result'' from these query functions — which can be overridden in the Gtkmm C++ implementation through the {{{Gtk::Widget::get_preferred_width_vfunc()}}} and {{{Gtk::Widget::get_preferred_height_for_width_vfunc()}}}. However, since GTK assumes these values to be sane and sufficient for a proper realisation of any embedded content, at this point we get the responsibility to control and reduce the embedded child widget's extension to bring them into compliance. Failing to do so will lead to garbled drawing on screen.
Our solution approach is to watch the results returned by the default implementation and possibly to hide content until the remaining content conforms to the size constraint; after that, we can return //exactly our calibrated size// and expect GTK to observe this request, passing it down to embedded widgets reduced by style decorations.
</pre>
</div>
<div title="GuiFacade" modifier="Ichthyostega" created="200902080719" modified="201708041501" tags="def spec" changecount="1">

906
wiki/thinkPad.ichthyo.mm
View file

@ -18240,9 +18240,9 @@
</node>
</node>
</node>
<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1612620568330" ID="ID_1826613475" MODIFIED="1612620738928" TEXT="Problem: feste Gr&#xf6;&#xdf;en-Vorgabe">
<node BACKGROUND_COLOR="#eef0c5" COLOR="#990000" CREATED="1612620568330" ID="ID_1826613475" MODIFIED="1663977403139" TEXT="Problem: feste Gr&#xf6;&#xdf;en-Vorgabe">
<linktarget COLOR="#f17881" DESTINATION="ID_1826613475" ENDARROW="Default" ENDINCLINATION="1266;110;" ID="Arrow_ID_1550601686" SOURCE="ID_351516626" STARTARROW="None" STARTINCLINATION="2103;126;"/>
<icon BUILTIN="hourglass"/>
<icon BUILTIN="pencil"/>
<node CREATED="1625072904888" ID="ID_373040535" MODIFIED="1625072974106" TEXT="pa&#xdf;t nicht recht in den Gtk-Standard">
<richcontent TYPE="NOTE"><html>
<head>
@ -18255,9 +18255,32 @@
</body>
</html></richcontent>
</node>
<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1625075098065" HGAP="75" ID="ID_740164704" MODIFIED="1625075127483" TEXT="Frage: wo mu&#xdf; man anpassen...." VSHIFT="-5">
<node COLOR="#435e98" CREATED="1625075098065" HGAP="75" ID="ID_740164704" MODIFIED="1663977387429" TEXT="Frage: wo mu&#xdf; man anpassen...." VSHIFT="-5">
<edge COLOR="#a56a6a"/>
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<icon BUILTIN="help"/>
<node CREATED="1663977162683" ID="ID_948579259" MODIFIED="1663977175076" TEXT="dazu mu&#xdf; man den Layout-Allokations-Mechanismus verstehen"/>
<node CREATED="1663977179224" ID="ID_1440569490" MODIFIED="1663977197290" TEXT="die Standard-Implementierung ist eine Kette von Aggregation und Delegation"/>
<node BACKGROUND_COLOR="#d5d1ef" COLOR="#435e98" CREATED="1663976907423" ID="ID_1507590849" MODIFIED="1663977378741" TEXT="Fazit">
<arrowlink COLOR="#6b229a" DESTINATION="ID_1503005110" ENDARROW="Default" ENDINCLINATION="-1806;-166;" ID="Arrow_ID_1347071203" STARTARROW="None" STARTINCLINATION="-2004;582;"/>
<font BOLD="true" NAME="SansSerif" SIZE="12"/>
<icon BUILTIN="info"/>
<node CREATED="1663976912732" ID="ID_1628642843" MODIFIED="1663976935956" TEXT="direkt bei den get_preferred-VFuncs ansetzen"/>
<node CREATED="1663976936598" ID="ID_538084170" MODIFIED="1663976947659" TEXT="Standard-Impl delegiert und aggregiert hier nur"/>
<node CREATED="1663976948910" ID="ID_665707543" MODIFIED="1663976964397" TEXT="die Basiswerte stammen aus der CSS-Auswertung"/>
<node CREATED="1663976973787" ID="ID_1501027418" MODIFIED="1663977503034" TEXT="also drei Schritte">
<arrowlink COLOR="#825098" DESTINATION="ID_763928282" ENDARROW="Default" ENDINCLINATION="-708;-358;" ID="Arrow_ID_1762163985" STARTARROW="None" STARTINCLINATION="-29;281;"/>
<node CREATED="1663976978882" ID="ID_1756884177" MODIFIED="1663977086920" TEXT="Basis-Impl aufrufen &#x27f9; holt Standard-Layout von CSS">
<icon BUILTIN="full-1"/>
</node>
<node CREATED="1663976986201" ID="ID_280056674" MODIFIED="1663977065627" TEXT="Abgleich, Manipulation, Ausblenden &#x27f9; bis Constraint erf&#xfc;llt">
<icon BUILTIN="full-2"/>
</node>
<node CREATED="1663977014990" ID="ID_696754346" MODIFIED="1663977067787" TEXT="dann schlie&#xdf;lich den vordefinierten Size-Constraint zur&#xfc;ckliefern">
<icon BUILTIN="full-3"/>
</node>
</node>
</node>
</node>
</node>
<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1661557586218" ID="ID_859822896" MODIFIED="1661620110453" TEXT="Zeitangabe in Ausdehnung umsetzen">
@ -18540,6 +18563,41 @@
</node>
<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1662241925929" ID="ID_217944947" MODIFIED="1662241933868" TEXT="horizontale Ausdehnung">
<icon BUILTIN="flag-yellow"/>
<node CREATED="1663945598778" ID="ID_1866891133" MODIFIED="1663945862337" TEXT="Ansatz">
<icon BUILTIN="idea"/>
<node CREATED="1663945603065" ID="ID_1792803134" MODIFIED="1663945629088" TEXT="Mechanismus zur Gr&#xf6;&#xdf;enbeschr&#xe4;nkung auf dem Haupt-Widget"/>
<node CREATED="1663945637397" ID="ID_1469516364" MODIFIED="1663945650908" TEXT="erforderliche Ausdehnung der Kind-Elemente feststellen"/>
<node CREATED="1663945651910" ID="ID_897434501" MODIFIED="1663945668859" TEXT="Kind-Elemente ggfs verbergen"/>
<node CREATED="1663945669814" ID="ID_1057659827" MODIFIED="1663945692748">
<richcontent TYPE="NODE"><html>
<head>
</head>
<body>
<p>
ver&#228;nderte Men&#252;-Steuerung bei derartiger <i>Degradierung</i>
</p>
</body>
</html></richcontent>
</node>
<node CREATED="1663945712608" ID="ID_1162263503" MODIFIED="1663945819361" TEXT="minimal-Ausdehung per API bereitstellen">
<richcontent TYPE="NOTE"><html>
<head>
</head>
<body>
<p>
das bedeutet: es ist Aufgabe eines &#252;bergeordneten Layout-Managers, dann auch ein <i>reduziertes Display</i>&#160;zu schalten; das ElementBoxWidget kann davon ausgehen, den minimal ben&#246;tigten Platz auch zu bekommen (size request)
</p>
</body>
</html></richcontent>
<icon BUILTIN="yes"/>
</node>
</node>
<node BACKGROUND_COLOR="#eef0c5" COLOR="#990000" CREATED="1663977435805" ID="ID_763928282" MODIFIED="1663977503035" TEXT="L&#xf6;sungs-Mechanismus GTK+CSS">
<linktarget COLOR="#825098" DESTINATION="ID_763928282" ENDARROW="Default" ENDINCLINATION="-708;-358;" ID="Arrow_ID_1762163985" SOURCE="ID_1501027418" STARTARROW="None" STARTINCLINATION="-29;281;"/>
<icon BUILTIN="pencil"/>
</node>
</node>
<node BACKGROUND_COLOR="#d2beaf" COLOR="#5c4d6e" CREATED="1661703437825" ID="ID_1401386216" MODIFIED="1661703453368" TEXT="proportional Head placement">
<icon BUILTIN="hourglass"/>
@ -26768,7 +26826,7 @@
<icon BUILTIN="messagebox_warning"/>
<node CREATED="1542383666724" ID="ID_1850932291" MODIFIED="1557498707230" TEXT="Clipping-Region">
<node COLOR="#435e98" CREATED="1542383689152" ID="ID_1534655843" MODIFIED="1557498707230" TEXT="wird der on_draw() mitgegeben">
<arrowlink COLOR="#5e86ca" DESTINATION="ID_577859258" ENDARROW="Default" ENDINCLINATION="-1325;0;" ID="Arrow_ID_1966515866" STARTARROW="None" STARTINCLINATION="-1797;81;"/>
<arrowlink COLOR="#5e86ca" DESTINATION="ID_577859258" ENDARROW="Default" ENDINCLINATION="-1494;46;" ID="Arrow_ID_1966515866" STARTARROW="None" STARTINCLINATION="-1797;81;"/>
<icon BUILTIN="info"/>
<node CREATED="1555021726291" ID="ID_529262560" MODIFIED="1557498707230" TEXT="Entnehmen und Aufbereiten">
<node CREATED="1555021755898" ID="ID_968519712" MODIFIED="1557498707230" TEXT="Cairo liefert double-Koordinaten"/>
@ -30642,181 +30700,59 @@
<node CREATED="1612480298341" ID="ID_1348090876" MODIFIED="1612480308730" TEXT="funktioniert nur zur Vergr&#xf6;&#xdf;erung"/>
<node CREATED="1612480309646" ID="ID_1463447127" MODIFIED="1612480315253" TEXT="aber beschneidet nicht"/>
</node>
<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1612527452448" FOLDED="true" ID="ID_1007765197" MODIFIED="1612620519992" TEXT="gen&#xfc;gt noch nicht: kann nicht beschneiden">
<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1612527452448" ID="ID_1007765197" MODIFIED="1663946037264" TEXT="gen&#xfc;gt noch nicht: kann nicht beschneiden">
<icon BUILTIN="bell"/>
<node CREATED="1612527477300" ID="ID_734302531" MODIFIED="1612527498185" TEXT="es funktioniert so bereits, das Widget zu vergr&#xf6;&#xdf;ern">
<icon BUILTIN="idea"/>
</node>
<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1612527499386" HGAP="34" ID="ID_615948747" MODIFIED="1612620501553" TEXT="was passiert da konkret im Framework?" VSHIFT="-49">
<linktarget COLOR="#4b67b0" DESTINATION="ID_615948747" ENDARROW="Default" ENDINCLINATION="-1100;0;" ID="Arrow_ID_1297405131" SOURCE="ID_1143769023" STARTARROW="None" STARTINCLINATION="-1942;189;"/>
<icon BUILTIN="help"/>
<node CREATED="1612530135923" ID="ID_597723725" MODIFIED="1612530155607" TEXT="gtkwidget.c Zeile 5960ff">
<node COLOR="#435e98" CREATED="1612620409921" ID="ID_643882250" MODIFIED="1663946479492" TEXT="size handling in Framework">
<arrowlink COLOR="#364ec7" DESTINATION="ID_615948747" ENDARROW="Default" ENDINCLINATION="-1440;0;" ID="Arrow_ID_866144981" STARTARROW="None" STARTINCLINATION="-1942;189;"/>
<icon BUILTIN="info"/>
</node>
<node CREATED="1612532127121" ID="ID_1698900734" MODIFIED="1612532140107" TEXT="gtk_widget_set_size_request">
<node CREATED="1612532223794" ID="ID_1417902323" MODIFIED="1612532224951" TEXT="gtk_widget_set_usize_internal">
<node CREATED="1612532273671" ID="ID_1466904431" MODIFIED="1612532285991" TEXT="&#xfc;bernimmt die Werte in den internen PImpl"/>
<node CREATED="1612532301521" ID="ID_1985717542" MODIFIED="1612532313462" TEXT="setzt bei Bedarf ein queue_resize ab">
<icon BUILTIN="idea"/>
</node>
</node>
<node CREATED="1612532323107" ID="ID_194122765" MODIFIED="1612532337848" TEXT="d.h. danach sind priv-&gt;height bzw priv-&gt;width gesetzt"/>
</node>
<node CREATED="1612534268245" ID="ID_1296614142" MODIFIED="1612534272767" TEXT="gtk_widget_ensure_allocate">
<icon BUILTIN="forward"/>
<node CREATED="1612534275444" ID="ID_1132981577" MODIFIED="1612534290190" TEXT="pr&#xfc;ft Flag ob Allokation notwendig ist">
<node CREATED="1612534410570" ID="ID_620587901" MODIFIED="1612534423818" TEXT="Anscheined geht die initiale Allokation &#xfc;ber einen anderen Weg">
<icon BUILTIN="help"/>
</node>
<node CREATED="1612534429503" ID="ID_567668302" MODIFIED="1612534445049" TEXT="hier wird vorausgesezt, da&#xdf; bereits eine valide Allokation besteht"/>
</node>
<node CREATED="1612534325037" ID="ID_947651551" MODIFIED="1612534327833" TEXT="ruft auf">
<node CREATED="1612534329157" ID="ID_682604518" MODIFIED="1612534330137" TEXT="gtk_widget_get_allocated_size"/>
<node CREATED="1612534338443" ID="ID_585162600" MODIFIED="1612534339967" TEXT="gtk_widget_size_allocate_with_baseline"/>
</node>
<node CREATED="1612534361857" ID="ID_1011780997" MODIFIED="1612534383361" TEXT="Container: ruft rekursiv auf jedem Kind gtk_widget_ensure_allocate"/>
</node>
<node CREATED="1612535382254" ID="ID_1555274499" MODIFIED="1612535383977" TEXT="gtk_button_size_allocate">
<node CREATED="1612535387227" ID="ID_986479404" MODIFIED="1612535395872" TEXT="ruft f&#xfc;r sich selber gtk_widget_size_allocate"/>
<node CREATED="1612535398051" ID="ID_565262993" MODIFIED="1612535410704" TEXT="dann: gtk_css_gadget_allocate">
<node CREATED="1612535412121" ID="ID_950467979" MODIFIED="1612535417956" TEXT="f&#xfc;r den Inhalt des Buttons"/>
<node CREATED="1612535418784" ID="ID_1076896202" MODIFIED="1612535429635" TEXT="ensprechend um Margin + Padding reduziert"/>
<node CREATED="1612535549422" ID="ID_1526326867" MODIFIED="1612535563481" TEXT="gadget-&gt;allocate (virtuelle Funktion)">
<node CREATED="1612535615766" ID="ID_261273731" MODIFIED="1612535656704" TEXT="z.B. gtk_box_gadget_allocate">
<arrowlink DESTINATION="ID_526990189" ENDARROW="Default" ENDINCLINATION="24;0;" ID="Arrow_ID_1005009779" STARTARROW="None" STARTINCLINATION="24;0;"/>
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<node CREATED="1612535648889" ID="ID_526990189" MODIFIED="1612535656704" TEXT="gtk_box_gadget_allocate_child">
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<node CREATED="1612535679525" HGAP="30" ID="ID_1762849787" MODIFIED="1612535732163" TEXT="ruft dann gtk_widget_size_allocate_with_baseline" VSHIFT="26">
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</node>
</node>
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</node>
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<node CREATED="1612527537150" ID="ID_619170334" MODIFIED="1612535718797" TEXT="gtk_widget_size_allocate">
<linktarget COLOR="#4c96df" DESTINATION="ID_619170334" ENDARROW="Default" ENDINCLINATION="22;-288;" ID="Arrow_ID_1708313707" SOURCE="ID_1762849787" STARTARROW="None" STARTINCLINATION="-30;150;"/>
<node CREATED="1612528130053" ID="ID_1806340634" MODIFIED="1612528177893" TEXT="macht nur etwas f&#xfc;r &quot;toplevel&quot;-Widgets">
<richcontent TYPE="NOTE"><html>
<head>
</head>
<body>
<p>
das ist eine Flag in der privaten Widget-Struktur. Keine Ahnung was das bedeutet.<br />Und &#252;brigens: sichtbar mu&#223; das Widget auch noch sein...
</p>
</body>
</html></richcontent>
<icon BUILTIN="messagebox_warning"/>
</node>
<node CREATED="1612529820222" ID="ID_1943944289" MODIFIED="1612529840523" TEXT="unterscheidet dann">
<node CREATED="1612529852915" ID="ID_1335328932" MODIFIED="1612529852915" TEXT="GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH">
<node CREATED="1612531874357" ID="ID_321040886" MODIFIED="1612531874357" TEXT="gtk_widget_get_preferred_width">
<node CREATED="1612613898889" ID="ID_1906328896" MODIFIED="1612613898889" TEXT="gtk_widget_real_get_width"/>
<node CREATED="1612614169294" ID="ID_1044574457" MODIFIED="1612614182044" TEXT="default-Impl (widget) liefert einfach 0"/>
<node CREATED="1612614424711" ID="ID_876925671" MODIFIED="1612614453769" TEXT="Button: delegiert an gtk_css_gadget_get_preferred_size"/>
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<node CREATED="1612531881837" ID="ID_503088638" MODIFIED="1612531883430" TEXT="gtk_widget_get_preferred_height_for_width">
<node CREATED="1612613911103" ID="ID_1759726068" MODIFIED="1612613912600" TEXT="gtk_widget_real_get_height_for_width"/>
<node CREATED="1612614183776" ID="ID_1283663519" MODIFIED="1612614233786" TEXT="default-Impl (widget) delegiert an get_preferred_heigt">
<richcontent TYPE="NOTE"><html>
<head>
</head>
<body>
<p>
also stellt eigentlich grade nicht die versprochene Logik bereit
</p>
</body>
</html></richcontent>
</node>
<node CREATED="1612614424711" ID="ID_407129358" MODIFIED="1612614528239" TEXT="Button: delegiert an gtk_css_gadget_get_preferred_size (ORIENTATION_VERTICAL und &quot;forSize&quot;)"/>
</node>
</node>
<node CREATED="1612529854679" ID="ID_620839789" MODIFIED="1612529865489" TEXT="sonst == default">
<icon BUILTIN="messagebox_warning"/>
<node CREATED="1612531908423" ID="ID_981765041" MODIFIED="1612531909730" TEXT="gtk_widget_get_preferred_height"/>
<node CREATED="1612531918893" ID="ID_1720836756" MODIFIED="1612531919753" TEXT="gtk_widget_get_preferred_width_for_height"/>
</node>
<node CREATED="1612529867091" ID="ID_1467925874" MODIFIED="1612531897569" TEXT="d.h. es gibt zwei, nicht drei Alternativen">
<icon BUILTIN="idea"/>
</node>
</node>
<node CREATED="1612529887521" ID="ID_761185703" MODIFIED="1612529894551" TEXT="danach liegt vor">
<node CREATED="1612529924676" ID="ID_677442017" MODIFIED="1612529929887" TEXT="min_width"/>
<node CREATED="1612529930763" ID="ID_540378683" MODIFIED="1612529935382" TEXT="natural_width"/>
<node CREATED="1612529935882" ID="ID_574785014" MODIFIED="1612529938438" TEXT="min_height"/>
<node CREATED="1612529939218" ID="ID_226125510" MODIFIED="1612529942181" TEXT="natural_heigt"/>
</node>
<node CREATED="1612529944548" ID="ID_1276575353" MODIFIED="1612529951405" TEXT="nun wird justiert">
<node CREATED="1612530023488" ID="ID_716347716" MODIFIED="1612530028518" TEXT="(widget)-&gt;adjust_size_allocation">
<icon BUILTIN="info"/>
</node>
<node CREATED="1612530030341" ID="ID_1722501910" MODIFIED="1612530038256" TEXT="stets zweimal aufgerufen">
<node CREATED="1612529954784" ID="ID_1163322850" MODIFIED="1612529961136" TEXT="zuerst in horizontaler Dimension"/>
<node CREATED="1612529961751" ID="ID_1659658095" MODIFIED="1612529966442" TEXT="dann in vertikaler Dimension"/>
</node>
<node CREATED="1612530387661" ID="ID_1677551972" MODIFIED="1612530414969">
<richcontent TYPE="NODE"><html>
<head>
</head>
<body>
<p>
danach noch die <i>adjust_baseline_allocation</i>
</p>
</body>
</html></richcontent>
</node>
</node>
<node CREATED="1612530059555" ID="ID_1426144413" MODIFIED="1612534894781" TEXT="Signal: SIZE_ALLOCATE">
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<node CREATED="1612530091126" ID="ID_1651628600" MODIFIED="1612530097016" TEXT="ggfs ein Redraw ausgel&#xf6;st"/>
</node>
<node CREATED="1612534851565" ID="ID_800205161" MODIFIED="1612534894781" TEXT="widget-&gt;size_allocate">
<linktarget COLOR="#3156c0" DESTINATION="ID_800205161" ENDARROW="Default" ENDINCLINATION="-5;-110;" ID="Arrow_ID_1513246240" SOURCE="ID_1426144413" STARTARROW="None" STARTINCLINATION="-67;9;"/>
<node CREATED="1612534944266" ID="ID_1372642184" MODIFIED="1612534985979" TEXT="gtk_widget_real_size_allocate">
<arrowlink COLOR="#6f6096" DESTINATION="ID_384051197" ENDARROW="Default" ENDINCLINATION="189;0;" ID="Arrow_ID_31086336" STARTARROW="None" STARTINCLINATION="161;15;"/>
<node CREATED="1612535006062" ID="ID_1456025781" MODIFIED="1612535014459" TEXT="pa&#xdf;t dann auch noch das GDK-Window an"/>
</node>
</node>
<node CREATED="1612534965805" ID="ID_384051197" MODIFIED="1612534981305" TEXT="gtk_widget_set_allocation">
<linktarget COLOR="#6f6096" DESTINATION="ID_384051197" ENDARROW="Default" ENDINCLINATION="189;0;" ID="Arrow_ID_31086336" SOURCE="ID_1372642184" STARTARROW="None" STARTINCLINATION="161;15;"/>
<node CREATED="1612535196135" HGAP="24" ID="ID_293434969" MODIFIED="1612535244957" TEXT="weist einfach die Allokation zu" VSHIFT="12"/>
<node CREATED="1612535204550" ID="ID_1965689659" MODIFIED="1612535224055" TEXT="setzt au&#xdf;erdem auch noch die ClipArea auf genau diese Allokation"/>
</node>
<node CREATED="1612530262998" ID="ID_300054220" MODIFIED="1612530266178" TEXT="Einsichten">
<node CREATED="1612530267006" ID="ID_1055756887" MODIFIED="1612530295140" TEXT="man hat grunds&#xe4;tzlich nur die Wahl &quot;height for width&quot; oder anders herum?"/>
<node CREATED="1612530297000" ID="ID_786276329" MODIFIED="1612530314209" TEXT="die minimal_width|heigt wird nur f&#xfc;r einen Konsistenzcheck verwendet">
<node CREATED="1612530584619" ID="ID_51694809" MODIFIED="1612530601140" TEXT="in der weiteren Verarbeitung steht an der Stelle eine Variable &quot;dummy&quot;"/>
</node>
<node CREATED="1612530343387" ID="ID_750045618" MODIFIED="1612530358270" TEXT="jedoch die natural_width|height wird weiterverarbeitet"/>
<node CREATED="1612530419105" ID="ID_1290168160" MODIFIED="1612530523191" TEXT="und zwar &#xfc;ber die Indirektion">
<node CREATED="1612530440941" ID="ID_894448937" MODIFIED="1612530446521" TEXT="widget-&gt;adjust_size_allocation"/>
<node CREATED="1612530498191" ID="ID_117553121" MODIFIED="1612530503860" TEXT="gtk_widget_real_adjust_size_allocation()"/>
<node CREATED="1612530640491" ID="ID_1645471050" MODIFIED="1612530666958" TEXT="ruft auf (entsprechend Orientierung)">
<richcontent TYPE="NOTE"><html>
<head>
</head>
<body>
<p>
also entweder in horizontaler, oder in vertikaler Richtung
</p>
</body>
</html></richcontent>
<node CREATED="1612530653137" ID="ID_1843450417" MODIFIED="1612530654181" TEXT="adjust_for_margin"/>
<node CREATED="1612530676214" ID="ID_277814433" MODIFIED="1612530677407" TEXT="adjust_for_align"/>
</node>
</node>
</node>
</node>
<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1612613065268" ID="ID_700841626" LINK="https://stackoverflow.com/q/66076682/444796" MODIFIED="1612613080947" TEXT="Frage auf Stackoverflow gestellt">
<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1612613065268" FOLDED="true" ID="ID_700841626" LINK="https://stackoverflow.com/q/66076682/444796" MODIFIED="1663962502206" TEXT="Frage auf Stackoverflow gestellt">
<icon BUILTIN="hourglass"/>
<icon BUILTIN="button_cancel"/>
<node CREATED="1663957087480" ID="ID_9335539" MODIFIED="1663957260417" TEXT="Frage wurde automatisch gel&#xf6;scht">
<richcontent TYPE="NOTE"><html>
<head>
</head>
<body>
<p http-equiv="content-type" content="text/html; charset=utf-8">
<strong>If the question is more than <code>365</code>&#160;days old, and ...</strong>
</p>
<ul>
<li>
has a score of 0 or less, <strong>or</strong>&#160;a score of 1 and a deleted owner
</li>
<li>
has no answers
</li>
<li>
is not locked
</li>
<li>
has view count &lt;= the age of the question in days times 1.5
</li>
<li>
has 1 or 0 comments
</li>
</ul>
</body>
</html></richcontent>
<node CREATED="1663957105414" ID="ID_1623688955" MODIFIED="1663957110606" TEXT="nur 55 Views"/>
<node CREATED="1663957111175" ID="ID_1833399738" MODIFIED="1663957115320" TEXT="kein Upvote"/>
<node CREATED="1663957116078" ID="ID_713646207" MODIFIED="1663957119176" TEXT="kein Kommentar"/>
<node CREATED="1663957119988" ID="ID_1332345095" MODIFIED="1663957122487" TEXT="keine Antwort"/>
</node>
<node CREATED="1663957303187" ID="ID_697240020" MODIFIED="1663957310774" TEXT="ist definitiv keine B&#xf6;sartigkeit"/>
<node CREATED="1663957264448" ID="ID_642110272" MODIFIED="1663962465341" TEXT="Merke: um &quot;m&#xfc;hsame&quot; Fragen mu&#xdf; man sich k&#xfc;mmern">
<icon BUILTIN="messagebox_warning"/>
</node>
</node>
<node COLOR="#338800" CREATED="1612619390361" ID="ID_571017696" MODIFIED="1612619500409" TEXT="n&#xe4;chster Ansatz: get_preferred_width_vfunc">
</node>
<node COLOR="#338800" CREATED="1612619390361" ID="ID_571017696" MODIFIED="1663955991363" TEXT="n&#xe4;chster Ansatz: get_preferred_width_vfunc">
<arrowlink COLOR="#77afb6" DESTINATION="ID_321040886" ENDARROW="Default" ENDINCLINATION="-3752;338;" ID="Arrow_ID_765236235" STARTARROW="None" STARTINCLINATION="-3454;-1310;"/>
<icon BUILTIN="button_ok"/>
<node CREATED="1612619418068" ID="ID_506962706" MODIFIED="1612619499778" TEXT="auf dem Clip-Widget selber &#xfc;berschrieben"/>
<node CREATED="1612619434154" ID="ID_1820519135" MODIFIED="1612619499778" TEXT="ignoriert das Kind und liefert den nominellen Wert zur&#xfc;ck"/>
@ -30824,6 +30760,27 @@
<linktarget COLOR="#67384d" DESTINATION="ID_616104406" ENDARROW="Default" ENDINCLINATION="-856;39;" ID="Arrow_ID_349418044" SOURCE="ID_548348096" STARTARROW="None" STARTINCLINATION="241;19;"/>
<icon BUILTIN="messagebox_warning"/>
</node>
<node BACKGROUND_COLOR="#e0ceaa" COLOR="#690f14" CREATED="1663955680592" HGAP="19" ID="ID_1517213874" MODIFIED="1663955701843" TEXT="trotzdem: das ist vermutlich der einzige gangbare Weg" VSHIFT="5">
<icon BUILTIN="yes"/>
<node CREATED="1663955710647" ID="ID_1436931569" MODIFIED="1663955749454">
<richcontent TYPE="NODE"><html>
<head>
</head>
<body>
<p>
weil dies die einzige Info ist,
</p>
<p>
welche direkt vom Widget abgefragt wird,
</p>
<p>
im Zuge der Layout-Berechnung
</p>
</body>
</html></richcontent>
</node>
</node>
</node>
</node>
<node COLOR="#435e98" CREATED="1612471480502" ID="ID_103620026" MODIFIED="1612480353892" TEXT="&#xdc;bersetzung Zeit in Pixel">
@ -57599,6 +57556,436 @@
</node>
</node>
</node>
<node CREATED="1663946250024" ID="ID_1142643633" MODIFIED="1663946255308" TEXT="Layout management">
<node CREATED="1663946256977" ID="ID_1464608958" MODIFIED="1663946261875" TEXT="Thema: Size-Handling">
<node COLOR="#435e98" CREATED="1612527499386" HGAP="34" ID="ID_615948747" MODIFIED="1663946547267" TEXT="Untersuchung: size_request &#x2014; 2/21 f&#xfc;r Clip-Display" VSHIFT="-49">
<linktarget COLOR="#4b67b0" DESTINATION="ID_615948747" ENDARROW="Default" ENDINCLINATION="-1100;0;" ID="Arrow_ID_1297405131" SOURCE="ID_1143769023" STARTARROW="None" STARTINCLINATION="-2000;141;"/>
<linktarget COLOR="#364ec7" DESTINATION="ID_615948747" ENDARROW="Default" ENDINCLINATION="-1440;0;" ID="Arrow_ID_866144981" SOURCE="ID_643882250" STARTARROW="None" STARTINCLINATION="-1942;189;"/>
<icon BUILTIN="info"/>
<node CREATED="1612530135923" ID="ID_597723725" MODIFIED="1612530155607" TEXT="gtkwidget.c Zeile 5960ff">
<icon BUILTIN="info"/>
</node>
<node CREATED="1612532127121" ID="ID_1698900734" MODIFIED="1612532140107" TEXT="gtk_widget_set_size_request">
<node CREATED="1663948672795" ID="ID_1935344830" MODIFIED="1663948681710" TEXT=" gtkwidget.c 11186"/>
<node CREATED="1663949014421" ID="ID_761292468" MODIFIED="1663949024301" TEXT="definiert die Mindes-Anforderung dieses Widgets"/>
<node CREATED="1663949035261" ID="ID_1775424216" MODIFIED="1663949054174" TEXT="kann undefiniert sein (-1) &#x27f9; dann natural request"/>
<node CREATED="1612532223794" ID="ID_1417902323" MODIFIED="1612532224951" TEXT="gtk_widget_set_usize_internal">
<node CREATED="1612532273671" ID="ID_1466904431" MODIFIED="1612532285991" TEXT="&#xfc;bernimmt die Werte in den internen PImpl"/>
<node CREATED="1612532301521" ID="ID_1985717542" MODIFIED="1663954418865">
<richcontent TYPE="NODE"><html>
<head>
</head>
<body>
<p>
setzt bei Bedarf ein <b>queue_resize</b>&#160;ab
</p>
</body>
</html></richcontent>
<icon BUILTIN="idea"/>
<node CREATED="1663948849724" ID="ID_592500885" MODIFIED="1663948855049" TEXT="wenn widget sichtbar ist"/>
<node CREATED="1663948855574" ID="ID_1581313527" MODIFIED="1663948882381" TEXT="und H&#xf6;he oder Breite wirklich ge&#xe4;ndert sind"/>
</node>
<node CREATED="1663954499071" ID="ID_1959081786" MODIFIED="1663955501010">
<richcontent TYPE="NODE"><html>
<head>
</head>
<body>
<p>
<u>danach</u>: priv-&gt;resize_needed = TRUE
</p>
</body>
</html></richcontent>
<arrowlink COLOR="#852376" DESTINATION="ID_563938836" ENDARROW="Default" ENDINCLINATION="18;-93;" ID="Arrow_ID_1194665328" STARTARROW="None" STARTINCLINATION="-211;17;"/>
</node>
</node>
<node CREATED="1612532323107" ID="ID_194122765" MODIFIED="1612532337848" TEXT="d.h. danach sind priv-&gt;height bzw priv-&gt;width gesetzt"/>
<node CREATED="1663949727304" ID="ID_1165234670" MODIFIED="1663949735266" TEXT="setzt gtk_widget_set_alloc_needed">
<node CREATED="1663949745454" ID="ID_313723300" MODIFIED="1663951388123" TEXT="Flag priv-&gt;alloc_needed">
<arrowlink COLOR="#b51c69" DESTINATION="ID_1132981577" ENDARROW="Default" ENDINCLINATION="34;-19;" ID="Arrow_ID_684196469" STARTARROW="None" STARTINCLINATION="-49;6;"/>
</node>
</node>
</node>
<node CREATED="1663954860585" ID="ID_1293292924" MODIFIED="1663954864003" TEXT="resize_needed">
<node CREATED="1663954865611" ID="ID_1181046845" MODIFIED="1663954871465" TEXT="interne Flag im widget"/>
<node CREATED="1663954879636" ID="ID_1910791425" MODIFIED="1663954884163" TEXT="Verwendungen">
<node CREATED="1663954901013" MODIFIED="1663954901013" TEXT="gtk_widget_needs_allocate"/>
<node CREATED="1663954909806" ID="ID_1374760334" MODIFIED="1663954909806" TEXT="gtk_widget_ensure_resize">
<node CREATED="1663954912759" ID="ID_600146300" MODIFIED="1663954920356" TEXT="implementiert durch L&#xf6;schen eines Cache*"/>
<node CREATED="1663954925510" ID="ID_1181014721" MODIFIED="1663954926481" TEXT="_gtk_size_request_cache_clear"/>
<node CREATED="1663954927597" ID="ID_871436829" MODIFIED="1663954950237" TEXT="Vermutung: dort wird gespeichert, was nicht resized werden mu&#xdf;">
<icon BUILTIN="idea"/>
</node>
</node>
<node CREATED="1663954959625" ID="ID_758176211" MODIFIED="1663954960741" TEXT="gtk_widget_get_resize_needed"/>
</node>
</node>
<node CREATED="1612535679525" HGAP="30" ID="ID_563938836" MODIFIED="1663955495496" VSHIFT="26">
<richcontent TYPE="NODE"><html>
<head>
</head>
<body>
<p>
alle F&#228;den laufen zusammen bei....
</p>
<p>
<b>gtk_widget_size_allocate_with_baseline</b>
</p>
</body>
</html></richcontent>
<arrowlink COLOR="#4c96df" DESTINATION="ID_619170334" ENDARROW="Default" ENDINCLINATION="22;-288;" ID="Arrow_ID_1241133759" STARTARROW="None" STARTINCLINATION="-30;150;"/>
<linktarget COLOR="#852376" DESTINATION="ID_563938836" ENDARROW="Default" ENDINCLINATION="18;-93;" ID="Arrow_ID_1194665328" SOURCE="ID_1959081786" STARTARROW="None" STARTINCLINATION="-211;17;"/>
<icon BUILTIN="idea"/>
<node CREATED="1663955121019" ID="ID_1249298775" MODIFIED="1663955138898" TEXT="wird direkt anscheinend nur von Init aus aktiviert"/>
<node CREATED="1663955139409" ID="ID_857432800" MODIFIED="1663955255321" TEXT="aber die Call-Graphen sind schwer durchschaubar">
<richcontent TYPE="NOTE"><html>
<head>
</head>
<body>
<p>
...da Funktionen irgendwo dann an Funktionspointer zugewiesen werden f&#252;r &quot;virtuelle Funktionen&quot;
</p>
</body>
</html></richcontent>
<icon BUILTIN="idea"/>
</node>
<node CREATED="1663955335710" ID="ID_1881953589" MODIFIED="1663955347072" TEXT="Einstieg: gtk_widget_ensure_allocate">
<node CREATED="1663955359715" ID="ID_627182614" MODIFIED="1663955359715" TEXT="gtk_container_real_check_resize"/>
<node CREATED="1663955369802" ID="ID_929212584" MODIFIED="1663955415140" TEXT="das ist die class-&gt;check_resize VFunk">
<arrowlink COLOR="#627791" DESTINATION="ID_1244279782" ENDARROW="Default" ENDINCLINATION="226;-55;" ID="Arrow_ID_1806488152" STARTARROW="None" STARTINCLINATION="400;28;"/>
</node>
</node>
</node>
<node CREATED="1612534268245" ID="ID_1296614142" MODIFIED="1663947680137" TEXT="gtk_widget_ensure_allocate">
<icon BUILTIN="back"/>
<node CREATED="1612534275444" ID="ID_1132981577" MODIFIED="1663951388124" TEXT="pr&#xfc;ft Flag ob Allokation notwendig ist">
<linktarget COLOR="#b51c69" DESTINATION="ID_1132981577" ENDARROW="Default" ENDINCLINATION="34;-19;" ID="Arrow_ID_684196469" SOURCE="ID_313723300" STARTARROW="None" STARTINCLINATION="-49;6;"/>
<node CREATED="1612534410570" ID="ID_620587901" MODIFIED="1612534423818" TEXT="Anscheined geht die initiale Allokation &#xfc;ber einen anderen Weg">
<icon BUILTIN="help"/>
</node>
<node CREATED="1612534429503" ID="ID_567668302" MODIFIED="1612534445049" TEXT="hier wird vorausgesezt, da&#xdf; bereits eine valide Allokation besteht"/>
</node>
<node CREATED="1663949865622" ID="ID_758836772" MODIFIED="1663949872083" TEXT="aufgerufen von...">
<node CREATED="1663949997924" ID="ID_1496580283" MODIFIED="1663950003095" TEXT="nach Container-Init"/>
<node CREATED="1663950003563" ID="ID_59538652" MODIFIED="1663950006646" TEXT="rekursiv von ">
<node CREATED="1663950018185" ID="ID_238633492" MODIFIED="1663950018877" TEXT="gtk_widget_size_allocate_with_baseline"/>
<node CREATED="1663950027784" ID="ID_1937200960" MODIFIED="1663950030291" TEXT="f&#xfc;r Kinder"/>
</node>
</node>
<node CREATED="1612534325037" ID="ID_947651551" MODIFIED="1612534327833" TEXT="ruft auf">
<node CREATED="1612534329157" ID="ID_682604518" MODIFIED="1612534330137" TEXT="gtk_widget_get_allocated_size"/>
<node CREATED="1612534338443" ID="ID_585162600" MODIFIED="1612534339967" TEXT="gtk_widget_size_allocate_with_baseline"/>
</node>
<node CREATED="1612534361857" ID="ID_1011780997" MODIFIED="1612534383361" TEXT="Container: ruft rekursiv auf jedem Kind gtk_widget_ensure_allocate"/>
<node CREATED="1663953791941" HGAP="65" ID="ID_1244279782" MODIFIED="1663955453989" TEXT="f&#xfc;hrt weiter zu check_resize" VSHIFT="43">
<linktarget COLOR="#627791" DESTINATION="ID_1244279782" ENDARROW="Default" ENDINCLINATION="226;-55;" ID="Arrow_ID_1806488152" SOURCE="ID_929212584" STARTARROW="None" STARTINCLINATION="400;28;"/>
<node CREATED="1663953805363" ID="ID_1587549150" MODIFIED="1663953812528" TEXT="wieder eine virtuelle Funktion"/>
<node CREATED="1663953813403" ID="ID_656209552" MODIFIED="1663953825583" TEXT="wird offensichtlich von der Initialisierung aus aufgerufen"/>
<node CREATED="1663953843699" ID="ID_1950479692" MODIFIED="1663953845946" TEXT="gtk_window_check_resize">
<font BOLD="true" NAME="SansSerif" SIZE="12"/>
</node>
<node CREATED="1663953826319" ID="ID_1109844083" MODIFIED="1663953841300" TEXT="weitere Aufrufe verlieren sich im Nebel">
<icon BUILTIN="smiley-angry"/>
</node>
</node>
</node>
<node CREATED="1663951703391" ID="ID_427278328" MODIFIED="1663951706793" TEXT="widget_class-&gt;size_allocate">
<icon BUILTIN="back"/>
<node CREATED="1663951707842" ID="ID_315178651" MODIFIED="1663951753639" TEXT="virtuelle Funktion">
<richcontent TYPE="NOTE"><html>
<head>
</head>
<body>
<p>
wird im class-init mit der jeweiligen konkreten Implementierung belegt, z.b. gtk_button_size_allocate
</p>
</body>
</html></richcontent>
</node>
<node CREATED="1663954200285" ID="ID_398055899" MODIFIED="1663954210495" TEXT="au&#xdf;erdem kann ein Handler / Signal angeschlossen sein">
<node CREATED="1663954234237" ID="ID_1380094030" MODIFIED="1663954234909" TEXT="widget_signals[SIZE_ALLOCATE]"/>
</node>
<node CREATED="1663954295573" ID="ID_1498770016" MODIFIED="1663954312087" TEXT="aufgerufen von gtk_widget_size_allocate_with_baseline">
<arrowlink DESTINATION="ID_1762849787" ENDARROW="Default" ENDINCLINATION="38;-96;" ID="Arrow_ID_1571144985" STARTARROW="None" STARTINCLINATION="476;0;"/>
<node CREATED="1663954335100" HGAP="39" ID="ID_1824384222" MODIFIED="1663954342338" TEXT="letztlich von init" VSHIFT="18"/>
</node>
</node>
<node CREATED="1612535382254" ID="ID_1555274499" MODIFIED="1612535383977" TEXT="gtk_button_size_allocate">
<node CREATED="1612535679525" HGAP="30" ID="ID_462243081" MODIFIED="1663948420227" TEXT="ruft f&#xfc;r sich selber gtk_widget_size_allocate" VSHIFT="26">
<arrowlink COLOR="#4c96df" DESTINATION="ID_619170334" ENDARROW="Default" ENDINCLINATION="22;-288;" ID="Arrow_ID_89255297" STARTARROW="None" STARTINCLINATION="-30;150;"/>
</node>
<node CREATED="1612535398051" ID="ID_565262993" MODIFIED="1612535410704" TEXT="dann: gtk_css_gadget_allocate">
<node CREATED="1612535412121" ID="ID_950467979" MODIFIED="1612535417956" TEXT="f&#xfc;r den Inhalt des Buttons"/>
<node CREATED="1612535418784" ID="ID_1076896202" MODIFIED="1612535429635" TEXT="ensprechend um Margin + Padding reduziert"/>
<node CREATED="1612535549422" ID="ID_1526326867" MODIFIED="1612535563481" TEXT="gadget-&gt;allocate (virtuelle Funktion)">
<node CREATED="1612535615766" ID="ID_261273731" MODIFIED="1612535656704" TEXT="z.B. gtk_box_gadget_allocate">
<arrowlink DESTINATION="ID_526990189" ENDARROW="Default" ENDINCLINATION="24;0;" ID="Arrow_ID_1005009779" STARTARROW="None" STARTINCLINATION="24;0;"/>
</node>
<node CREATED="1612535648889" ID="ID_526990189" MODIFIED="1612535656704" TEXT="gtk_box_gadget_allocate_child">
<linktarget COLOR="#a9b4c1" DESTINATION="ID_526990189" ENDARROW="Default" ENDINCLINATION="24;0;" ID="Arrow_ID_1005009779" SOURCE="ID_261273731" STARTARROW="None" STARTINCLINATION="24;0;"/>
<node CREATED="1612535679525" HGAP="30" ID="ID_1762849787" MODIFIED="1663956468314" TEXT="ruft dann gtk_widget_size_allocate_with_baseline" VSHIFT="26">
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<linktarget COLOR="#a9b4c1" DESTINATION="ID_1762849787" ENDARROW="Default" ENDINCLINATION="38;-96;" ID="Arrow_ID_1571144985" SOURCE="ID_1498770016" STARTARROW="None" STARTINCLINATION="476;0;"/>
</node>
</node>
</node>
</node>
</node>
<node CREATED="1612527537150" ID="ID_619170334" MODIFIED="1663967533656" TEXT="gtk_widget_size_allocate">
<arrowlink COLOR="#5c5a78" DESTINATION="ID_1103556230" ENDARROW="Default" ENDINCLINATION="-618;-30;" ID="Arrow_ID_1785324866" STARTARROW="Default" STARTINCLINATION="-4;247;"/>
<linktarget COLOR="#4c96df" DESTINATION="ID_619170334" ENDARROW="Default" ENDINCLINATION="22;-288;" ID="Arrow_ID_1708313707" SOURCE="ID_1762849787" STARTARROW="None" STARTINCLINATION="-77;137;"/>
<linktarget COLOR="#4c96df" DESTINATION="ID_619170334" ENDARROW="Default" ENDINCLINATION="22;-288;" ID="Arrow_ID_89255297" SOURCE="ID_462243081" STARTARROW="None" STARTINCLINATION="-30;150;"/>
<linktarget COLOR="#4c96df" DESTINATION="ID_619170334" ENDARROW="Default" ENDINCLINATION="22;-288;" ID="Arrow_ID_1241133759" SOURCE="ID_563938836" STARTARROW="None" STARTINCLINATION="-30;150;"/>
<node CREATED="1612528130053" ID="ID_1806340634" MODIFIED="1612528177893" TEXT="macht nur etwas f&#xfc;r &quot;toplevel&quot;-Widgets">
<richcontent TYPE="NOTE"><html>
<head>
</head>
<body>
<p>
das ist eine Flag in der privaten Widget-Struktur. Keine Ahnung was das bedeutet.<br />Und &#252;brigens: sichtbar mu&#223; das Widget auch noch sein...
</p>
</body>
</html></richcontent>
<icon BUILTIN="messagebox_warning"/>
</node>
<node CREATED="1612529820222" HGAP="22" ID="ID_1943944289" MODIFIED="1663956475522" TEXT="unterscheidet dann" VSHIFT="12">
<node CREATED="1663956186778" HGAP="117" ID="ID_834898748" MODIFIED="1663956450989" TEXT="gtk_widget_get_request_mode()" VSHIFT="37">
<node CREATED="1663956207368" ID="ID_18553128" MODIFIED="1663956217421" TEXT="gtksizerequest.c 450"/>
<node CREATED="1663956419563" ID="ID_1026472626" MODIFIED="1663956420751" TEXT="GTK_WIDGET_GET_CLASS (widget)-&gt;get_request_mode (widget)"/>
<node CREATED="1663956425698" ID="ID_225463858" MODIFIED="1663956441088" TEXT="Doku">
<richcontent TYPE="NOTE"><html>
<head>
</head>
<body>
<p>
&#160;* Gets whether the widget prefers a height-for-width layout
</p>
<p>
&#160;* or a width-for-height layout.
</p>
<p>
&#160;*
</p>
<p>
&#160;* #GtkBin widgets generally propagate the preference of
</p>
<p>
&#160;* their child, container widgets need to request something either in
</p>
<p>
&#160;* context of their children or in context of their allocation
</p>
<p>
&#160;* capabilities.
</p>
</body>
</html></richcontent>
<icon BUILTIN="info"/>
</node>
</node>
<node CREATED="1612529852915" HGAP="22" ID="ID_1335328932" MODIFIED="1663956457164" TEXT="GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH" VSHIFT="-25">
<node CREATED="1612531874357" ID="ID_321040886" MODIFIED="1663955991363" TEXT="gtk_widget_get_preferred_width">
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<node CREATED="1612613898889" ID="ID_1906328896" MODIFIED="1612613898889" TEXT="gtk_widget_real_get_width"/>
<node CREATED="1612614169294" ID="ID_1044574457" MODIFIED="1612614182044" TEXT="default-Impl (widget) liefert einfach 0"/>
<node CREATED="1612614424711" ID="ID_876925671" MODIFIED="1612614453769" TEXT="Button: delegiert an gtk_css_gadget_get_preferred_size"/>
</node>
<node CREATED="1612531881837" ID="ID_503088638" MODIFIED="1612531883430" TEXT="gtk_widget_get_preferred_height_for_width">
<node CREATED="1612613911103" ID="ID_1759726068" MODIFIED="1612613912600" TEXT="gtk_widget_real_get_height_for_width"/>
<node CREATED="1612614183776" ID="ID_1283663519" MODIFIED="1612614233786" TEXT="default-Impl (widget) delegiert an get_preferred_heigt">
<richcontent TYPE="NOTE"><html>
<head>
</head>
<body>
<p>
also stellt eigentlich grade nicht die versprochene Logik bereit
</p>
</body>
</html></richcontent>
</node>
<node CREATED="1612614424711" ID="ID_407129358" MODIFIED="1612614528239" TEXT="Button: delegiert an gtk_css_gadget_get_preferred_size (ORIENTATION_VERTICAL und &quot;forSize&quot;)"/>
</node>
</node>
<node CREATED="1612529854679" ID="ID_620839789" MODIFIED="1612529865489" TEXT="sonst == default">
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<node CREATED="1612531908423" ID="ID_981765041" MODIFIED="1612531909730" TEXT="gtk_widget_get_preferred_height"/>
<node CREATED="1612531918893" ID="ID_1720836756" MODIFIED="1612531919753" TEXT="gtk_widget_get_preferred_width_for_height"/>
</node>
<node CREATED="1612529867091" ID="ID_1467925874" MODIFIED="1612531897569" TEXT="d.h. es gibt zwei, nicht drei Alternativen">
<icon BUILTIN="idea"/>
</node>
</node>
<node CREATED="1612529887521" ID="ID_761185703" MODIFIED="1612529894551" TEXT="danach liegt vor">
<node CREATED="1612529924676" ID="ID_677442017" MODIFIED="1612529929887" TEXT="min_width"/>
<node CREATED="1612529930763" ID="ID_540378683" MODIFIED="1612529935382" TEXT="natural_width"/>
<node CREATED="1612529935882" ID="ID_574785014" MODIFIED="1612529938438" TEXT="min_height"/>
<node CREATED="1612529939218" ID="ID_226125510" MODIFIED="1612529942181" TEXT="natural_heigt"/>
</node>
<node CREATED="1612529944548" ID="ID_1276575353" MODIFIED="1612529951405" TEXT="nun wird justiert">
<node CREATED="1612530023488" ID="ID_716347716" MODIFIED="1612530028518" TEXT="(widget)-&gt;adjust_size_allocation">
<icon BUILTIN="info"/>
</node>
<node CREATED="1612530030341" ID="ID_1722501910" MODIFIED="1612530038256" TEXT="stets zweimal aufgerufen">
<node CREATED="1612529954784" ID="ID_1163322850" MODIFIED="1612529961136" TEXT="zuerst in horizontaler Dimension"/>
<node CREATED="1612529961751" ID="ID_1659658095" MODIFIED="1612529966442" TEXT="dann in vertikaler Dimension"/>
</node>
<node CREATED="1612530387661" ID="ID_1677551972" MODIFIED="1612530414969">
<richcontent TYPE="NODE"><html>
<head>
</head>
<body>
<p>
danach noch die <i>adjust_baseline_allocation</i>
</p>
</body>
</html></richcontent>
</node>
</node>
<node CREATED="1612530059555" ID="ID_1426144413" MODIFIED="1612534894781" TEXT="Signal: SIZE_ALLOCATE">
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</node>
<node CREATED="1612530091126" ID="ID_1651628600" MODIFIED="1612530097016" TEXT="ggfs ein Redraw ausgel&#xf6;st"/>
</node>
<node CREATED="1612534851565" ID="ID_800205161" MODIFIED="1612534894781" TEXT="widget-&gt;size_allocate">
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<node CREATED="1612534944266" ID="ID_1372642184" MODIFIED="1612534985979" TEXT="gtk_widget_real_size_allocate">
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<node CREATED="1612535006062" ID="ID_1456025781" MODIFIED="1612535014459" TEXT="pa&#xdf;t dann auch noch das GDK-Window an"/>
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</node>
<node CREATED="1612534965805" ID="ID_384051197" MODIFIED="1612534981305" TEXT="gtk_widget_set_allocation">
<linktarget COLOR="#6f6096" DESTINATION="ID_384051197" ENDARROW="Default" ENDINCLINATION="189;0;" ID="Arrow_ID_31086336" SOURCE="ID_1372642184" STARTARROW="None" STARTINCLINATION="161;15;"/>
<node CREATED="1612535196135" HGAP="24" ID="ID_293434969" MODIFIED="1612535244957" TEXT="weist einfach die Allokation zu" VSHIFT="12"/>
<node CREATED="1612535204550" ID="ID_1965689659" MODIFIED="1612535224055" TEXT="setzt au&#xdf;erdem auch noch die ClipArea auf genau diese Allokation"/>
</node>
<node CREATED="1612530262998" ID="ID_300054220" MODIFIED="1612530266178" TEXT="Einsichten">
<node CREATED="1612530267006" ID="ID_1055756887" MODIFIED="1612530295140" TEXT="man hat grunds&#xe4;tzlich nur die Wahl &quot;height for width&quot; oder anders herum?"/>
<node CREATED="1612530297000" ID="ID_786276329" MODIFIED="1612530314209" TEXT="die minimal_width|heigt wird nur f&#xfc;r einen Konsistenzcheck verwendet">
<node CREATED="1612530584619" ID="ID_51694809" MODIFIED="1612530601140" TEXT="in der weiteren Verarbeitung steht an der Stelle eine Variable &quot;dummy&quot;"/>
</node>
<node CREATED="1612530343387" ID="ID_750045618" MODIFIED="1612530358270" TEXT="jedoch die natural_width|height wird weiterverarbeitet"/>
<node CREATED="1612530419105" ID="ID_1290168160" MODIFIED="1612530523191" TEXT="und zwar &#xfc;ber die Indirektion">
<node CREATED="1612530440941" ID="ID_894448937" MODIFIED="1612530446521" TEXT="widget-&gt;adjust_size_allocation"/>
<node CREATED="1612530498191" ID="ID_117553121" MODIFIED="1612530503860" TEXT="gtk_widget_real_adjust_size_allocation()"/>
<node CREATED="1612530640491" ID="ID_1645471050" MODIFIED="1612530666958" TEXT="ruft auf (entsprechend Orientierung)">
<richcontent TYPE="NOTE"><html>
<head>
</head>
<body>
<p>
also entweder in horizontaler, oder in vertikaler Richtung
</p>
</body>
</html></richcontent>
<node CREATED="1612530653137" ID="ID_1843450417" MODIFIED="1612530654181" TEXT="adjust_for_margin"/>
<node CREATED="1612530676214" ID="ID_277814433" MODIFIED="1612530677407" TEXT="adjust_for_align"/>
</node>
</node>
</node>
</node>
</node>
<node CREATED="1663975843179" ID="ID_1935747548" MODIFIED="1663976133002" TEXT="was ist ein CSS Gadget?">
<richcontent TYPE="NOTE"><html>
<head>
</head>
<body>
<p>
/*
</p>
<p>
&#160;* Gadgets are 'next-generation widgets' - they combine a CSS node
</p>
<p>
&#160;* for style matching with geometry management and drawing. Each gadget
</p>
<p>
&#160;* corresponds to 'CSS box'. Compared to traditional widgets, they are more
</p>
<p>
&#160;* like building blocks - a typical GTK+ widget will have multiple gadgets,
</p>
<p>
&#160;* for example a check button has its main gadget, and sub-gadgets for
</p>
<p>
&#160;* the checkmark and the text.
</p>
<p>
&#160;*
</p>
<p>
&#160;* Gadgets are not themselves hierarchically organized, but it is common
</p>
<p>
&#160;* to have a 'main' gadget, which gets used by the widgets size_allocate,
</p>
<p>
&#160;* get_preferred_width, etc. and draw callbacks, and which in turn calls out
</p>
<p>
&#160;* to the sub-gadgets. This call tree might extend further if there are
</p>
<p>
&#160;* sub-sub-gadgets that a allocated relative to sub-gadgets. In typical
</p>
<p>
&#160;* situations, the callback chain will reflect the tree structure of the
</p>
<p>
&#160;* gadgets CSS nodes.
</p>
<p>
&#160;*
</p>
<p>
&#160;* Geometry management - Gadgets implement much of the CSS box model for you:
</p>
<p>
&#160;* margins, border, padding, shadows, min-width/height are all applied automatically.
</p>
<p>
&#160;*
</p>
<p>
&#160;* Drawing - Gadgets implement standardized CSS drawing for you: background,
</p>
<p>
&#160;* shadows and border are drawn before any custom drawing, and the focus outline
</p>
<p>
&#160;* is (optionally) drawn afterwards.
</p>
<p>
&#160;*
</p>
<p>
&#160;* Invalidation - Gadgets sit 'between' widgets and CSS nodes, and connect
</p>
<p>
&#160;* to the nodes ::style-changed signal and trigger appropriate invalidations
</p>
<p>
&#160;* on the widget side.
</p>
<p>
&#160;*/
</p>
</body>
</html></richcontent>
<linktarget COLOR="#56719e" DESTINATION="ID_1935747548" ENDARROW="Default" ENDINCLINATION="-1149;116;" ID="Arrow_ID_875944733" SOURCE="ID_1277756929" STARTARROW="None" STARTINCLINATION="-702;39;"/>
<icon BUILTIN="info"/>
</node>
</node>
<node CREATED="1504215708147" ID="ID_975007807" MODIFIED="1557498707238" TEXT="Widget">
<node CREATED="1535630469053" ID="ID_608304313" MODIFIED="1557498707238" TEXT="konkret...">
<font ITALIC="true" NAME="SansSerif" SIZE="12"/>
@ -57929,6 +58316,7 @@
<node CREATED="1540646156591" ID="ID_1103556230" MODIFIED="1560693186079" TEXT="Gtk::Widget::size_allocate(Allocation const&amp;) ">
<linktarget COLOR="#59699c" DESTINATION="ID_1103556230" ENDARROW="Default" ENDINCLINATION="-876;0;" ID="Arrow_ID_72712594" SOURCE="ID_841316619" STARTARROW="None" STARTINCLINATION="-1659;0;"/>
<linktarget COLOR="#7573ab" DESTINATION="ID_1103556230" ENDARROW="Default" ENDINCLINATION="763;-59;" ID="Arrow_ID_1309280117" SOURCE="ID_1615499339" STARTARROW="None" STARTINCLINATION="537;121;"/>
<linktarget COLOR="#5c5a78" DESTINATION="ID_1103556230" ENDARROW="Default" ENDINCLINATION="-618;-30;" ID="Arrow_ID_1785324866" SOURCE="ID_619170334" STARTARROW="Default" STARTINCLINATION="-4;247;"/>
<node CREATED="1540646197649" ID="ID_1973894224" MODIFIED="1557498707239" TEXT="kann ein Container auf einem Kind-Widget aufrufen"/>
<node CREATED="1540646207146" ID="ID_781482261" MODIFIED="1557498707239" TEXT="Folge: Framework adjustiert die Allocation (f&#xfc;r Margins)"/>
<node CREATED="1540646220099" ID="ID_219594395" MODIFIED="1557498707239" TEXT="und ruft die virtuelle Funktion adjust_size_allocation"/>
@ -57985,7 +58373,7 @@
<icon BUILTIN="idea"/>
</node>
<node CREATED="1540647547755" ID="ID_577859258" MODIFIED="1557498707239" TEXT="die Clip-Region ist auf den tats&#xe4;chlich zu zeichnenden Bereich gesetzt">
<linktarget COLOR="#5e86ca" DESTINATION="ID_577859258" ENDARROW="Default" ENDINCLINATION="-1325;0;" ID="Arrow_ID_1966515866" SOURCE="ID_1534655843" STARTARROW="None" STARTINCLINATION="-1797;81;"/>
<linktarget COLOR="#5e86ca" DESTINATION="ID_577859258" ENDARROW="Default" ENDINCLINATION="-1494;46;" ID="Arrow_ID_1966515866" SOURCE="ID_1534655843" STARTARROW="None" STARTINCLINATION="-1797;81;"/>
</node>
<node CREATED="1554476229422" ID="ID_1814758951" MODIFIED="1557498707239" TEXT="dirty-region des Widget">
<node CREATED="1554476290649" ID="ID_1743268737" MODIFIED="1557498707239" TEXT="der Bereich welcher tats&#xe4;chlich neu gezeichnet werden mu&#xdf;">
@ -58008,9 +58396,179 @@
<icon BUILTIN="messagebox_warning"/>
<node CREATED="1612468930840" ID="ID_340039660" MODIFIED="1612468940602" TEXT="das ist von GTK nicht vorgesehen"/>
<node CREATED="1612468941622" ID="ID_1584501445" MODIFIED="1612468951097" TEXT="wegen Layout, Themes, Schriftarten"/>
<node COLOR="#435e98" CREATED="1612620409921" ID="ID_1143769023" MODIFIED="1612620497457" TEXT="size handling in Framework">
<arrowlink COLOR="#4b67b0" DESTINATION="ID_615948747" ENDARROW="Default" ENDINCLINATION="-1100;0;" ID="Arrow_ID_1297405131" STARTARROW="None" STARTINCLINATION="-1942;189;"/>
<icon BUILTIN="info"/>
<node COLOR="#435e98" CREATED="1612620409921" ID="ID_1143769023" MODIFIED="1663946886390" TEXT="explizite Gr&#xf6;&#xdf;e vs automatische Gr&#xf6;&#xdf;e">
<arrowlink COLOR="#4b67b0" DESTINATION="ID_615948747" ENDARROW="Default" ENDINCLINATION="-1100;0;" ID="Arrow_ID_1297405131" STARTARROW="None" STARTINCLINATION="-2000;141;"/>
<linktarget COLOR="#796ba9" DESTINATION="ID_1143769023" ENDARROW="Default" ENDINCLINATION="-733;-40;" ID="Arrow_ID_1215170372" SOURCE="ID_740164704" STARTARROW="None" STARTINCLINATION="-1892;158;"/>
<icon BUILTIN="idea"/>
<node CREATED="1663955547906" ID="ID_1016430790" MODIFIED="1663955571483" TEXT="Widget kann nur an zwei Stellen mitbestimmen">
<node CREATED="1663955572854" ID="ID_1528456404" MODIFIED="1663955585704" TEXT="size_request == Minimalanforderung"/>
<node CREATED="1663955586196" ID="ID_16918762" MODIFIED="1663955605462" TEXT="get_width_for_height | get_height_for_width"/>
</node>
<node CREATED="1663967697587" ID="ID_502729133" MODIFIED="1663967701287" TEXT="Platz-Zuteilung">
<node CREATED="1663967702275" ID="ID_1441338062" MODIFIED="1663967710309" TEXT="macht normalerweise das Framework(GTK)"/>
<node CREATED="1663967711002" ID="ID_1524127663" MODIFIED="1663967716503" TEXT="Container machen das f&#xfc;r ihre Kinder">
<node CREATED="1663967756387" ID="ID_1440467863" MODIFIED="1663967792184" TEXT="Einstieg: Gtk::Widget::size_allocate | ggfs. incl &#xbb;Baseline&#xab;">
<node CREATED="1663967838832" ID="ID_930797784" MODIFIED="1663967902777" TEXT="void gtk_widget_size_allocate (GtkWidget *widget, GtkAllocation *allocation)">
<font NAME="Monospaced" SIZE="12"/>
</node>
<node COLOR="#3f1d5e" CREATED="1663967838832" ID="ID_952771766" MODIFIED="1663968099720" TEXT="void gtk_widget_size_allocate_with_baseline (GtkWidget*, GtkAllocation*, baseline) ">
<richcontent TYPE="NOTE"><html>
<head>
</head>
<body>
<p>
Hier steckt die Implementierung, und zwar die Kernimplementierung der Platzzuteilungs-Logik von GTK
</p>
</body>
</html></richcontent>
<font BOLD="true" NAME="Monospaced" SIZE="12"/>
<icon BUILTIN="back"/>
</node>
</node>
<node CREATED="1663968217230" ID="ID_189000213" MODIFIED="1663968243111" TEXT="das ermittelt Pr&#xe4;ferenz und width-for-height | vis versa">
<node CREATED="1663973733068" ID="ID_419342062" MODIFIED="1663973735583" TEXT="delegiert an">
<node CREATED="1663973741555" ID="ID_49363701" MODIFIED="1663973742215" TEXT="gtk_widget_compute_size_for_orientation">
<node CREATED="1663973794195" ID="ID_639016320" MODIFIED="1663973821275" TEXT="for_size : Vorgabe oder -1 (=preferred)"/>
</node>
<node CREATED="1663974052296" ID="ID_1989206706" MODIFIED="1663974059035" TEXT="delegiert weiter...">
<node CREATED="1663974060249" ID="ID_186068184" MODIFIED="1663974060249" TEXT="gtk_widget_query_size_for_orientation"/>
<node CREATED="1663974135813" ID="ID_1305072943" MODIFIED="1663974144367" TEXT="dies ruft dann je nach orientation..."/>
<node CREATED="1663974315044" ID="ID_137296585" MODIFIED="1663974409384" TEXT="Warnung: hier wird ein Cache verwendet">
<icon BUILTIN="messagebox_warning"/>
</node>
<node CREATED="1663974144931" ID="ID_566577800" MODIFIED="1663976168903" TEXT="widget_class-&gt;get_preferred_width | height">
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<node CREATED="1663975550843" ID="ID_650217219" MODIFIED="1663975618095" TEXT="gtk_widget_real_get_width">
<node CREATED="1663975562545" ID="ID_1821813272" MODIFIED="1663975567220" TEXT="basis: setzt auf 0"/>
</node>
<node CREATED="1663975607443" HGAP="62" ID="ID_1509275843" MODIFIED="1663975616192" TEXT="gtk_button_get_preferred_width" VSHIFT="-18">
<node CREATED="1663975632692" ID="ID_151194506" MODIFIED="1663975639133" TEXT="delegiert an den Content"/>
<node CREATED="1663976074208" ID="ID_1192731327" MODIFIED="1663976171045" TEXT="gtk_css_gadget_get_preferred_size">
<linktarget COLOR="#a9b4c1" DESTINATION="ID_1192731327" ENDARROW="Default" ENDINCLINATION="-210;-13;" ID="Arrow_ID_1198291141" SOURCE="ID_774587702" STARTARROW="None" STARTINCLINATION="-209;-13;"/>
</node>
<node CREATED="1663975629109" ID="ID_1277756929" MODIFIED="1663976133002" TEXT="CSS Gadget als strukturierte Layout-Repr&#xe4;sentation">
<arrowlink COLOR="#56719e" DESTINATION="ID_1935747548" ENDARROW="Default" ENDINCLINATION="-1149;116;" ID="Arrow_ID_875944733" STARTARROW="None" STARTINCLINATION="-702;39;"/>
<icon BUILTIN="idea"/>
</node>
<node CREATED="1663976709823" ID="ID_1269320643" MODIFIED="1663976752139">
<richcontent TYPE="NODE"><html>
<head>
</head>
<body>
<p>
<font face="Monospaced" size="2">min_size = get_number (style, GTK_CSS_PROPERTY_MIN_WIDTH); </font>
</p>
<p>
<font face="Monospaced" size="2">min_for_size = get_number (style, GTK_CSS_PROPERTY_MIN_HEIGHT);&#160;</font>
</p>
</body>
</html></richcontent>
<icon BUILTIN="back"/>
</node>
<node BACKGROUND_COLOR="#e0ceaa" COLOR="#690f14" CREATED="1663976761113" HGAP="22" ID="ID_1693421261" MODIFIED="1663976876203" TEXT="&#x27f9; hier wird die CSS-Maschinerie verwendet" VSHIFT="-24">
<richcontent TYPE="NOTE"><html>
<head>
</head>
<body>
<p>
basierend auf der Widget-Struktur, welche in Widget-Paths &#252;bersetzt wurde
</p>
</body>
</html></richcontent>
</node>
</node>
<node CREATED="1663975664139" HGAP="92" ID="ID_1592877551" MODIFIED="1663976850634" TEXT="gtk_frame_get_preferred_width" VSHIFT="-93">
<node CREATED="1663975671490" ID="ID_774587702" MODIFIED="1663976171045" TEXT="macht das Gleiche">
<arrowlink DESTINATION="ID_1192731327" ENDARROW="Default" ENDINCLINATION="-210;-13;" ID="Arrow_ID_1198291141" STARTARROW="None" STARTINCLINATION="-209;-13;"/>
</node>
</node>
</node>
<node CREATED="1663974411518" ID="ID_174035361" MODIFIED="1663974421271" TEXT="widget_class-&gt;get_preferred_width_for_height | vv"/>
<node CREATED="1663974161185" ID="ID_92203435" MODIFIED="1663974166116" TEXT="C++-Impl">
<node CREATED="1663974247357" ID="ID_848538209" MODIFIED="1663974553681" TEXT="get_preferred_width_vfunc_callback">
<linktarget COLOR="#a9b4c1" DESTINATION="ID_848538209" ENDARROW="Default" ENDINCLINATION="-494;38;" ID="Arrow_ID_1696341233" SOURCE="ID_802152831" STARTARROW="None" STARTINCLINATION="516;0;"/>
</node>
<node CREATED="1663974480522" ID="ID_247416623" MODIFIED="1663974480522" TEXT="get_preferred_height_for_width_vfunc_callback"/>
<node CREATED="1663974483852" ID="ID_1328435851" MODIFIED="1663974485496" TEXT="..."/>
<node CREATED="1663975266562" ID="ID_193702026" MODIFIED="1663975273676" TEXT="derzeit nur wenig &#xfc;berschrieben">
<node CREATED="1663975287575" ID="ID_1399216426" MODIFIED="1663975290066" TEXT="cellarea"/>
<node CREATED="1663975290518" ID="ID_10312011" MODIFIED="1663975293146" TEXT="cellrenderer"/>
</node>
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<node CREATED="1663968248218" ID="ID_488172276" MODIFIED="1663968271389" TEXT="anschlie&#xdf;end: Setzen der definitiven Allokation">
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<node CREATED="1663972196609" ID="ID_913451433" MODIFIED="1663972209869" TEXT="konkrete Impl darf Alokation (nur) verkleinern!"/>
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<node CREATED="1663973353379" ID="ID_309346877" MODIFIED="1663974513324" TEXT="gtk_widget_get_preferred_height_for_width"/>
<node CREATED="1663973369308" ID="ID_1930369741" MODIFIED="1663974669350" TEXT="man k&#xf6;nnte die C-VFunk adjust_size_allocation &#xfc;berlagern">
<richcontent TYPE="NOTE"><html>
<head>
</head>
<body>
<p>
Keine gute Idee: diese Funtktion wird verwendet, um die Dekoration zu entfernen, und Stil-Anpassungen zu machen; sie sollte daher besser als <i>pure function </i>betrachtet werden
</p>
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</html></richcontent>
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<node CREATED="1663973396270" ID="ID_864492298" MODIFIED="1663973438074" TEXT="rein informativ: Widget::on_size_allocate()">
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