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Timeline: investigate problem with horizontal scrollbar

Browse source 
As it turns out, this happens as side-effect from the workaround 2019-08-22

fc5eaf857c

Obviously, just set_size() on the canvas is not sufficient for
GTK actually to establish a size-request (seemingly the canvas counts
as /empty/ and only real widgets would make a difference).
However, since the ruler canvas is directly placed into the box,
and not adapted by a ScrolledWindow, explicitly set_size_request()
also causes the enclosing Box to "inherit" this minimal required size,
thereby also spreading out the BodyCanvasWidget beyond the size
actually available. GTK handles this situation by hard-clipping
on the right side, which causes the vertical scrollbar to disappear
and keeps the horizontal scrollbar disabled (since nominally it still
spans the whole size available, even while this size is then clipped
subsequently).

This changeset adds a lot of debug printing and demonstrates this
behaviour by setting only a minimal horizontal size_request, so that
the window is no longer expanded and clipped.
This commit is contained in:
Fischlurch 2023-01-04 23:55:21 +01:00
parent c22bbe5f93
commit f3098daeb4
4 changed files with 299 additions and 15 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

29
src/stage/timeline/body-canvas-widget.cpp
View file

@ -52,7 +52,7 @@
//#include "stage/ui-bus.hpp"
//#include "lib/format-string.hpp"
//#include "lib/format-cout.hpp"
#include "lib/format-cout.hpp"//////////////TODO
#include "common/advice.hpp"
#include "lib/util.hpp"
@ -88,7 +88,7 @@ namespace timeline {
const int INITIAL_TIMERULER_HEIGHT_px = 30;
const int INITIAL_CONTENT_HEIGHT_px = 100;
const int INITIAL_CONTENT_WIDTH_px = 200;
const int MINIMAL_CONTENT_WIDTH_px = 100;
/** request a pre-defined CSS style context for the track body */
lumiera::advice::Request<PStyleContext> trackBodyStyle{"style(trackBody)"};
@ -444,7 +444,7 @@ namespace timeline {
};
// initially set up some dummy space. Will be updated to match on first draw() call...
adjustCanvasSize(INITIAL_CONTENT_WIDTH_px, INITIAL_CONTENT_HEIGHT_px, INITIAL_TIMERULER_HEIGHT_px);
adjustCanvasSize(MINIMAL_CONTENT_WIDTH_px, INITIAL_CONTENT_HEIGHT_px, INITIAL_TIMERULER_HEIGHT_px);
this->set_border_width (0);
this->property_expand() = true; // dynamically grab any available additional space
@ -517,9 +517,23 @@ namespace timeline {
BodyCanvasWidget::getEffectiveHorizontalSize() const
{
int widthForDebug = contentArea_.get_allocated_width();
Gtk::Allocation allo;
int basi{0};
contentArea_.get_allocated_size(allo,basi);
int alloW = allo.get_width();
auto hadj = contentArea_.get_hadjustment();
cout<<"|?| win::width="<<widthForDebug<<"("<<alloW<<") hadj="<<hadj->get_value()<<"/"<<hadj->get_upper()<<endl;
widthForDebug = util::max (widthForDebug - 100, 100); ////////////////////////////////////////TODO: visual debugging
return widthForDebug;
}
void
BodyCanvasWidget::on_size_allocate(Gtk::Allocation& allocation)
{
int alloW = allocation.get_width();
cout<<"|V| alloc::width="<<alloW<<endl;
Gtk::Box::on_size_allocate (allocation);
}
/**
@ -539,10 +553,14 @@ namespace timeline {
if (currWidth != newWidth or currHeight != newHeight)
{
canvas.set_size(newWidth, newHeight);
canvas.set_size_request(newWidth, newHeight); //Note: might be more than actually is available.
} // Assuming canvas is embedded into scrolled pane
// Note: must force GTK at least to claim the necessary height,
// otherwise the enclosing Box won't reflow and adapt;
// implicitly this defines minimum timeline window width
canvas.set_size_request(MINIMAL_CONTENT_WIDTH_px, newHeight);
}
};
cout<<"|!| adjustCanvasSize("<<canvasWidth<<", "<<rulerHeight<<"+"<<contentHeight<<")"<<endl;/////////////TODO
adjust (rulerCanvas_, canvasWidth, rulerHeight);
adjust (mainCanvas_, canvasWidth, contentHeight);
}
@ -669,6 +687,7 @@ namespace timeline {
cox->save();
cox->translate(-offH, -offV);
cout<<"|.| trans->"<<adjH->get_lower()<<"·"<<offH<<"·"<<adjH->get_upper()<<"("<<adjH->get_page_size()<<"±"<<adjH->get_page_increment()<<")"<<endl;
}

1
src/stage/timeline/body-canvas-widget.hpp
View file

@ -196,6 +196,7 @@ namespace timeline {
void slotStructureChange() noexcept;
void maybeRebuildLayout();
void adjustCanvasSize(int canvasWidth, int totalHeight, int rulerHeight);
void on_size_allocate(Gtk::Allocation& allocation) override; /////////////////////////TODO
};

5
src/stage/timeline/timeline-layout.cpp
View file

@ -39,7 +39,7 @@
//#include "stage/ui-bus.hpp"
//#include "lib/format-string.hpp"
//#include "lib/format-cout.hpp"
#include "lib/format-cout.hpp"///////////////////////////TODO
#include "common/advice.hpp"
//#include "lib/util.hpp"
@ -145,7 +145,10 @@ namespace timeline {
{
int contentWidthPx = bodyCanvas_.getEffectiveHorizontalSize();
if (contentWidthPx != zoomWindow_.pxWidth())
{////////////////////////////////////////////////////////////////TODO
cout<<"|!| zoom-calibrateExtension("<<zoomWindow_.pxWidth()<<" ⟶ "<<contentWidthPx<<")"<<endl;
zoomWindow_.calibrateExtension (contentWidthPx);
}////////////////////////////////////////////////////////////////TODO
}
void

279
wiki/thinkPad.ichthyo.mm
View file

@ -28028,11 +28028,13 @@
</node>
</node>
<node CREATED="1555082672083" ID="ID_1185653910" MODIFIED="1557498707228" TEXT="BodyCanvasWidget">
<node CREATED="1555082682753" ID="ID_1277383747" MODIFIED="1557498707228" TEXT="verwaltet und organisiert die Struktur"/>
<node CREATED="1555082682753" ID="ID_1277383747" MODIFIED="1557498707228" TEXT="verwaltet und organisiert die Struktur">
<node CREATED="1555082693273" ID="ID_723726755" MODIFIED="1557498707228" TEXT="hat zwei konkrete TimelineCanvas">
<node CREATED="1555082703199" ID="ID_81861736" MODIFIED="1557498707228" TEXT="oben f&#xfc;r den Time-Ruler"/>
<node CREATED="1555082710728" ID="ID_676334326" MODIFIED="1557498707228" TEXT="unten f&#xfc;r die Track-Struktur"/>
</node>
<node CREATED="1672872295046" ID="ID_1036782095" MODIFIED="1672872302033" TEXT="srolled pane"/>
</node>
<node CREATED="1555198475915" ID="ID_216668392" MODIFIED="1557498707228" TEXT="Koordinieren der draw-Aktivit&#xe4;t">
<node CREATED="1555198484257" ID="ID_447173098" MODIFIED="1557498707228" TEXT="Problem: Aufteilung">
<arrowlink DESTINATION="ID_577805455" ENDARROW="Default" ENDINCLINATION="146;-10;" ID="Arrow_ID_228489961" STARTARROW="Default" STARTINCLINATION="110;0;"/>
@ -29110,6 +29112,21 @@
<icon BUILTIN="flag-yellow"/>
<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1565282669252" ID="ID_1077695296" MODIFIED="1565282697164" TEXT="horizontal zu zeichnende Spanne">
<icon BUILTIN="flag-yellow"/>
<node CREATED="1672843594185" ID="ID_1806332659" MODIFIED="1672843600804" TEXT="Ausdehnung des Canvas">
<node CREATED="1672843603784" ID="ID_547988829" MODIFIED="1672843680818" TEXT="initial festlegen">
<arrowlink COLOR="#4b3d60" DESTINATION="ID_1283622298" ENDARROW="Default" ENDINCLINATION="-940;-885;" ID="Arrow_ID_425073157" STARTARROW="None" STARTINCLINATION="-693;122;"/>
</node>
<node CREATED="1672843689370" ID="ID_1279756396" MODIFIED="1672843707230" TEXT="reale Ausdehnung vom ScrolledWindow contentArea_">
<node COLOR="#435e98" CREATED="1672843720006" ID="ID_1969670799" MODIFIED="1672843870753" TEXT="siehe: Size-Allokation auf GTK Widget">
<arrowlink COLOR="#536cc0" DESTINATION="ID_1464608958" ENDARROW="Default" ENDINCLINATION="-1020;1248;" ID="Arrow_ID_1013900284" STARTARROW="None" STARTINCLINATION="-2004;139;"/>
<icon BUILTIN="info"/>
</node>
<node CREATED="1672843882154" ID="ID_1978068021" MODIFIED="1672845093813" TEXT="Widget::get_allocation|width|height (aktuell g&#xfc;ltiger Wert incl Alignment/Modifikationen)">
<linktarget COLOR="#a9b4c1" DESTINATION="ID_1978068021" ENDARROW="Default" ENDINCLINATION="323;11;" ID="Arrow_ID_920771700" SOURCE="ID_400583877" STARTARROW="None" STARTINCLINATION="462;0;"/>
</node>
<node CREATED="1672843927836" ID="ID_477932212" MODIFIED="1672844195140" TEXT="Widget::get_allocated_size (was gesetzt wurde, aber bereits ohne Dekoration)"/>
</node>
</node>
</node>
<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1565282697992" ID="ID_1761874542" MODIFIED="1565282702979" TEXT="vertikal belegter Raum">
<icon BUILTIN="flag-yellow"/>
@ -29151,7 +29168,8 @@
</node>
<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1566406980688" ID="ID_196847136" MODIFIED="1566406988165" TEXT="Layout-Anpsassungen">
<icon BUILTIN="flag-yellow"/>
<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1566407065037" ID="ID_548414744" MODIFIED="1566487490014" TEXT="Scrollbar anpassen nach Gr&#xf6;&#xdf;en&#xe4;nderung">
<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1566407065037" ID="ID_548414744" MODIFIED="1672842637926" TEXT="Scrollbar anpassen nach Gr&#xf6;&#xdf;en&#xe4;nderung">
<linktarget COLOR="#795b80" DESTINATION="ID_548414744" ENDARROW="Default" ENDINCLINATION="-897;636;" ID="Arrow_ID_1661740759" SOURCE="ID_679418178" STARTARROW="Default" STARTINCLINATION="-286;-17;"/>
<icon BUILTIN="pencil"/>
<node COLOR="#435e98" CREATED="1566407096905" ID="ID_1463503563" MODIFIED="1566487536944" TEXT="reagiert noch nicht...">
<font ITALIC="true" NAME="SansSerif" SIZE="12"/>
@ -29264,19 +29282,130 @@
<linktarget COLOR="#16d17f" DESTINATION="ID_489535600" ENDARROW="Default" ENDINCLINATION="-80;-272;" ID="Arrow_ID_1038229013" SOURCE="ID_832049284" STARTARROW="None" STARTINCLINATION="-102;166;"/>
<font NAME="SansSerif" SIZE="12"/>
<icon BUILTIN="button_ok"/>
<node CREATED="1566487213692" ID="ID_617175720" MODIFIED="1576282358055" TEXT="sollte eigentlich automatisch funktionieren">
<node CREATED="1566487213692" ID="ID_617175720" MODIFIED="1672867705882" TEXT="sollte eigentlich automatisch funktionieren">
<richcontent TYPE="NOTE"><html>
<head>
</head>
<body>
<ul>
<li>
die Funktionen zum expliziten Setzen und re-Sizing sind deprecated.
</li>
<li>
eigentlich sollte die Box automatisch auf Gr&#246;&#223;en&#228;nderungen der Kind-Elemente reagieren gem&#228;&#223; Flow/Fill-Layout
</li>
<li>
f&#252;r klassische Widgets wie z.B. Button funktioniert das auch
</li>
<li>
aber auf ein set_size() auf dem Canvas reagiert das Layout anscheinend nicht
</li>
</ul>
</body>
</html></richcontent>
</node>
<node CREATED="1566487282848" ID="ID_771271362" MODIFIED="1672867836660" TEXT="Workaround: jeweils erneut set_size_request">
<richcontent TYPE="NOTE"><html>
<head>
</head>
<body>
<p>
die Funktionen zum expliziten Setzen und re-Sizing sind deprecated.
<u>Anmerkung 1/2023</u>: seinerzeit habe ich die Mechanik der Layout-Zuteilung noch nicht wirklich verstanden
</p>
<p>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">commit fc5eaf857c687d769df22d6f98a25e8e359e7c49 </font>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">Author: Ichthyostega &lt;prg@ichthyostega.de&gt; </font>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">Date:&#160;&#160;&#160;Thu Aug 22 17:34:32 2019 +0200 </font>
</p>
<p>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">&#160;&#160;&#160;&#160;Timeline: find a workaround to cause the Box to reflow the rulerCanvas </font>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">&#160;&#160;&#160; </font>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">&#160;&#160;&#160;&#160;seemingly, the Box with PACK_SHRINK allocates a zero height to the rulerCanvas initally, </font>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">&#160;&#160;&#160;&#160;which is correct at that point, since the widgets are not yet realised. </font>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">&#160;&#160;&#160;&#160;However, when we later set_size() on the rulerCanvas, the enclosing Box should reflow. </font>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">&#160;&#160;&#160;&#160;It does indeed if the child widget is a button or something similar, however, </font>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">&#160;&#160;&#160;&#160;somehow this reflowing does not work when we set_size on the canvas. </font>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">&#160;&#160;&#160; </font>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">&#160;&#160;&#160;&#160;A workaround is to place a new set_size_request(). </font>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">&#160;&#160;&#160; </font>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">&#160;&#160;&#160;&#160;TODO: do this more precisely, and only on the rulerCanvas. To the contrary, </font>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">&#160;&#160;&#160;&#160;the mainCanvas is placed into a scolling-pane and thus does not need a size-Request. </font>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">&#160;&#160;&#160;&#160;Moreover, the latter automatically communicates with the hadjustment() / vadjustment() of </font>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">&#160;&#160;&#160;&#160;the enclosing scrollbars. </font>
</p>
<p>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">commit 2390385dc50a8504336f5e1fa1a5dc35eca58f2f </font>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">Author: Ichthyostega &lt;prg@ichthyostega.de&gt; </font>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">Date:&#160;&#160;&#160;Wed Aug 21 19:13:55 2019 +0200 </font>
</p>
<p>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">&#160;&#160;&#160;&#160;Timeline: implement function to set the drawing canvas size </font>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">&#160;&#160;&#160; </font>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">&#160;&#160;&#160;&#160;as can be verified with the debugger, it sets the correct sizes now. </font>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">&#160;&#160;&#160;&#160;And it is called only once (unless the content size actually changes). </font>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">&#160;&#160;&#160; </font>
</p>
<p>
<font color="#4d2a27" face="Monospaced" size="2">&#160;&#160;&#160;&#160;TODO: however, the visible display of the GTK widgets is not adjusted </font>
</p>
</body>
</html></richcontent>
</node>
<node CREATED="1566487282848" ID="ID_771271362" MODIFIED="1566487296971" TEXT="Workaround: jeweils erneut set_size_request">
<icon BUILTIN="idea"/>
<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1566487379550" ID="ID_272047983" MODIFIED="1576282358055" TEXT="TODO: genauer machen, und nur f&#xfc;r den Ruler-Canvas">
<richcontent TYPE="NOTE"><html>
@ -29305,11 +29434,104 @@
<node BACKGROUND_COLOR="#fdfdcf" COLOR="#ff0000" CREATED="1672798667029" ID="ID_1699842831" MODIFIED="1672799054739" TEXT="Integration ZoomWindow: funktioniert nicht (mehr)">
<linktarget COLOR="#ac3f80" DESTINATION="ID_1699842831" ENDARROW="Default" ENDINCLINATION="-1384;79;" ID="Arrow_ID_927325344" SOURCE="ID_133007183" STARTARROW="None" STARTINCLINATION="-1848;-74;"/>
<icon BUILTIN="broken-line"/>
<node CREATED="1672798696337" ID="ID_1553490887" MODIFIED="1672798742711" TEXT="greife jetzt ScrolledWindow::get_allocated_width() ab"/>
<node CREATED="1672798696337" ID="ID_1553490887" MODIFIED="1672798742711" TEXT="greife jetzt ScrolledWindow::get_allocated_width() ab">
<node CREATED="1672845045702" ID="ID_400583877" MODIFIED="1672845097544" TEXT="das w&#xe4;re grunds&#xe4;tzlich korrekt">
<arrowlink DESTINATION="ID_1978068021" ENDARROW="Default" ENDINCLINATION="323;11;" ID="Arrow_ID_920771700" STARTARROW="None" STARTINCLINATION="462;0;"/>
<icon BUILTIN="yes"/>
</node>
<node CREATED="1672845054021" ID="ID_1400277326" MODIFIED="1672845155612" TEXT="und ist auch konsistent mit dem &#xbb;horizontal adjustment&#xab; des ScrolledWindow">
<richcontent TYPE="NOTE"><html>
<head>
</head>
<body>
<p>
per DUMP-Print verifiziert: Maximalwert der Scrollbar (=hadj) ist identisch mit get_allocated_width
</p>
</body>
</html></richcontent>
</node>
</node>
<node CREATED="1672798745175" ID="ID_399045239" MODIFIED="1672798762372" TEXT="kalibriere damit das ZoomWindow, und beziehe davon dann die Canvas-Gr&#xf6;&#xdf;e"/>
<node CREATED="1672798763432" ID="ID_485578749" MODIFIED="1672798787610" TEXT="horizontale Scrollbar blockt und wird nach rechts beschnitten">
<icon BUILTIN="messagebox_warning"/>
</node>
<node CREATED="1672845159233" ID="ID_914079601" MODIFIED="1672867934061" TEXT="(1) Problem ist: keine Invalidierung &#x27f9; keine Display-Evaluation &#x27f9; Wert nicht abgerufen">
<icon BUILTIN="idea"/>
<node CREATED="1672847404194" ID="ID_1941365833" MODIFIED="1672847417490" TEXT="unser Layout-Code merkt daher gar nicht, wenn sich etwas &#xe4;ndert"/>
<node CREATED="1672847418472" ID="ID_411937904" MODIFIED="1672867873212" TEXT="Beobachtung m&#xf6;gliche Aktivierungen">
<icon BUILTIN="list"/>
<node CREATED="1672847435934" ID="ID_204065179" MODIFIED="1672847440225" TEXT="on_draw()">
<node CREATED="1672847448238" ID="ID_1819538437" MODIFIED="1672847457023" TEXT="wird wohl permanent aufgerufen"/>
<node CREATED="1672847458467" ID="ID_1233413965" MODIFIED="1672847471149" TEXT="sehe jede &#xc4;nderung des Layout sofort"/>
</node>
<node CREATED="1672847440981" ID="ID_828221766" MODIFIED="1672847446416" TEXT="on_size_allocate()">
<node CREATED="1672847675830" ID="ID_1048944592" MODIFIED="1672847684009" TEXT="nur bei Geometrie-&#xc4;nderungen"/>
<node CREATED="1672847684840" ID="ID_272958565" MODIFIED="1672847693224" TEXT="und bei Focus gain/loss"/>
</node>
<node CREATED="1672847699754" ID="ID_921332802" MODIFIED="1672867412724" TEXT="Feststellung: Gr&#xf6;&#xdf;e &quot;st&#xf6;&#xdf;t an&quot; an gesetzter Canvas-Gr&#xf6;&#xdf;e">
<richcontent TYPE="NOTE"><html>
<head>
</head>
<body>
<p>
Beispiel:
</p>
<ul>
<li>
initial wurde Canvas-Gr&#246;&#223;e auf 852px gesetzt (Debugging Code zieht 100px ab)
</li>
<li>
die Allocation f&#252;r das BodyCanvasWidget wird minimal 852
</li>
<li>
wenn man das Fenster (oder den Teiler der Pane) weiter verkleinert, wird trotzdem 852 geliefert &#10233; nach rechts beschnitten
</li>
</ul>
</body>
</html></richcontent>
<icon BUILTIN="idea"/>
</node>
</node>
</node>
<node CREATED="1672867905486" ID="ID_74954726" MODIFIED="1672867930798" TEXT="(2) Problem ist: Mindestgr&#xf6;&#xdf;e des Ruler-Canvas">
<icon BUILTIN="idea"/>
<node CREATED="1672867946048" ID="ID_303294117" MODIFIED="1672867967257" TEXT="das kommt von dem Workaround wegen Box-re-Pack"/>
<node CREATED="1672867974932" ID="ID_1158620825" MODIFIED="1672868021465" TEXT="der Ruler-Canvas liegt nicht in einer scrolled pane und &#x201e;spreizt&#x201c; deshalb">
<node CREATED="1672869698743" ID="ID_283208573" MODIFIED="1672869708010" TEXT="in vertikaler Richtung ist das ja auch korrekt"/>
<node CREATED="1672869723476" ID="ID_401276544" MODIFIED="1672869749468" TEXT="Gtk::Layout hat selber V/H-Adjustments und br&#xe4;uchte theoretisch kein Scrolled Window"/>
<node CREATED="1672869752647" ID="ID_1600272917" MODIFIED="1672869783428" TEXT="aber in horizontaler Richtung wollen wir ein kleineres Minimum">
<icon BUILTIN="messagebox_warning"/>
</node>
<node CREATED="1672871169883" ID="ID_923032562" MODIFIED="1672871357241" TEXT="mit dieser Korrektur funktioniert die horizontale Scrollbar (halbwegs) wie erwartet">
<richcontent TYPE="NOTE"><html>
<head>
</head>
<body>
<ul>
<li>
zumindest kann man nun das Fenster tats&#228;chlich verkleinern, und dann mit der Scrollbar horizontal den Haupt-Canvas bewegen.
</li>
<li>
aber der Ruler-Canvas scrollt nicht mit
</li>
<li>
und der Anzeige-Zustand der Scrollbar ist bei mouse-over(Scrollbar) nicht richtig synchronisiert; das wird erst korrekt nach einem Focus-loss/gain
</li>
</ul>
</body>
</html></richcontent>
</node>
</node>
</node>
</node>
</node>
<node CREATED="1672872402655" ID="ID_57784666" MODIFIED="1672872407100" TEXT="dynamische Anzeige">
<node CREATED="1672872408415" ID="ID_1423497948" MODIFIED="1672872423235" TEXT="Zoom koordinieren"/>
<node CREATED="1672872424309" ID="ID_1732041124" MODIFIED="1672872432016" TEXT="Scrolling koordinieren">
<node CREATED="1672872433811" ID="ID_814093517" MODIFIED="1672872453293" TEXT="Header / Patchbay ist an VAdjustment vom Body angekoppelt"/>
</node>
</node>
</node>
@ -29745,7 +29967,8 @@
<node CREATED="1542309666407" ID="ID_1721729181" MODIFIED="1557498707230" TEXT="initial....">
<node CREATED="1542309671333" ID="ID_1283622298" MODIFIED="1557498707230" TEXT="Gr&#xf6;&#xdf;e des leeren Canvas">
<arrowlink COLOR="#60749f" DESTINATION="ID_400560063" ENDARROW="Default" ENDINCLINATION="-46;0;" ID="Arrow_ID_449772156" STARTARROW="None" STARTINCLINATION="-13;18;"/>
<node CREATED="1542309689328" ID="ID_679418178" MODIFIED="1576282358053" TEXT="verwende size-Allocation des ScrolledWindow">
<linktarget COLOR="#4b3d60" DESTINATION="ID_1283622298" ENDARROW="Default" ENDINCLINATION="-940;-885;" ID="Arrow_ID_425073157" SOURCE="ID_547988829" STARTARROW="None" STARTINCLINATION="-693;122;"/>
<node CREATED="1542309689328" ID="ID_679418178" MODIFIED="1672842637926" TEXT="verwende size-Allocation des ScrolledWindow">
<richcontent TYPE="NOTE"><html>
<head>
@ -29756,6 +29979,7 @@
</p>
</body>
</html></richcontent>
<arrowlink COLOR="#795b80" DESTINATION="ID_548414744" ENDARROW="Default" ENDINCLINATION="-897;636;" ID="Arrow_ID_1661740759" STARTARROW="Default" STARTINCLINATION="-286;-17;"/>
<icon BUILTIN="idea"/>
</node>
</node>
@ -66214,7 +66438,8 @@
</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 CREATED="1663946256977" ID="ID_1464608958" MODIFIED="1672843870753" TEXT="Thema: Size-Handling">
<linktarget COLOR="#536cc0" DESTINATION="ID_1464608958" ENDARROW="Default" ENDINCLINATION="-1020;1248;" ID="Arrow_ID_1013900284" SOURCE="ID_1969670799" STARTARROW="None" STARTINCLINATION="-2004;139;"/>
<node COLOR="#435e98" CREATED="1612527499386" HGAP="34" ID="ID_615948747" MODIFIED="1664401278771" TEXT="Untersuchung: size_request &#x2014; 2/21 + 9/22 f&#xfc;r Clip-Display" VSHIFT="-49">
<richcontent TYPE="NOTE"><html>
<head>
@ -66843,6 +67068,32 @@
</node>
</node>
</node>
<node CREATED="1672842964141" ID="ID_215582571" MODIFIED="1672842976471" TEXT="relevante Gr&#xf6;&#xdf;en">
<node CREATED="1672842978065" ID="ID_1344762228" MODIFIED="1672842981558" TEXT="size-request">
<node CREATED="1672842982532" ID="ID_1586516076" MODIFIED="1672842995869" TEXT="das ist die nat&#xfc;rliche Minimal-Gr&#xf6;&#xdf;e des Widget"/>
<node CREATED="1672842996488" ID="ID_1718515236" MODIFIED="1672843011334" TEXT="sie wird von GTK stets honoriert"/>
<node CREATED="1672843017362" ID="ID_816898465" MODIFIED="1672843030912" TEXT="es gilt das &quot;natural*&quot;-Setting"/>
<node CREATED="1672843033169" ID="ID_796485263" MODIFIED="1672843052405" TEXT="die &quot;minimal*&quot;-Werte werden aktuell (3.20) nicht verwendet"/>
<node CREATED="1672843060904" ID="ID_1337685462" MODIFIED="1672843082281" TEXT="es gibt die zwei Varianten: hight-for-width | width-for-height"/>
</node>
<node CREATED="1672843085573" ID="ID_1497640739" MODIFIED="1672843330530" TEXT="size-allocation">
<linktarget COLOR="#7995ad" DESTINATION="ID_1497640739" ENDARROW="Default" ENDINCLINATION="-562;363;" ID="Arrow_ID_1967894607" SOURCE="ID_1504859134" STARTARROW="None" STARTINCLINATION="346;-29;"/>
<node CREATED="1672843091588" ID="ID_1908929596" MODIFIED="1672843108318" TEXT="die tats&#xe4;chlich von GTK zugeteilte Ausdehnung"/>
<node CREATED="1672843109026" ID="ID_448128589" MODIFIED="1672843117060" TEXT="ist stets gr&#xf6;&#xdf;er als der size-request"/>
<node CREATED="1672843122045" ID="ID_1297618005" MODIFIED="1672843134122" TEXT="wird vom Widget sofort um Dekoration reduziert"/>
<node CREATED="1672843134710" ID="ID_1879903789" MODIFIED="1672843144008" TEXT="nur der reduzierte Wert wird gespeichert">
<node CREATED="1672843145045" ID="ID_751859168" MODIFIED="1672843150136" TEXT="in der private-Struktur im Widget"/>
<node CREATED="1672843167666" ID="ID_551602758" MODIFIED="1672843169069" TEXT="priv-&gt;allocation"/>
<node CREATED="1672843251318" ID="ID_17591220" MODIFIED="1672843254290" TEXT="Getter: gtk_widget_get_allocation"/>
</node>
<node CREATED="1672843172626" ID="ID_1142235582" MODIFIED="1672843180449" TEXT="modifizierbar durch Alignment etc.">
<node CREATED="1672843181936" ID="ID_139335819" MODIFIED="1672843188827" TEXT="ebenfalls in der private-Struktur"/>
<node CREATED="1672843198774" ID="ID_1645020005" MODIFIED="1672843199936" TEXT="priv-&gt;allocated_size"/>
<node CREATED="1672843208916" ID="ID_43084891" MODIFIED="1672843210008" TEXT="priv-&gt;allocated_size_baseline"/>
<node CREATED="1672843223747" ID="ID_1074349241" MODIFIED="1672843229014" TEXT="Getter: gtk_widget_get_allocated_size"/>
</node>
</node>
</node>
</node>
<node CREATED="1663975843179" ID="ID_1935747548" MODIFIED="1663976133002" TEXT="was ist ein CSS Gadget?">
<richcontent TYPE="NOTE"><html>
@ -67276,6 +67527,16 @@
</node>
</node>
</node>
<node CREATED="1672842863450" ID="ID_1781957682" MODIFIED="1672842867742" TEXT="mapping">
<node CREATED="1672842868697" ID="ID_871975923" MODIFIED="1672842877133" TEXT="Widget wird einem GDK-Window zugeordnet"/>
<node CREATED="1672842878351" ID="ID_1331083783" MODIFIED="1672842893254" TEXT="Widget wird nach seinem size_request gefragt"/>
<node CREATED="1672842897112" ID="ID_1504859134" MODIFIED="1672843330529" TEXT="Widget bekommt size-Allocation">
<arrowlink COLOR="#7995ad" DESTINATION="ID_1497640739" ENDARROW="Default" ENDINCLINATION="-562;363;" ID="Arrow_ID_1967894607" STARTARROW="None" STARTINCLINATION="346;-29;"/>
<node CREATED="1672842907889" ID="ID_1244611946" MODIFIED="1672842923846" TEXT="diese wird sofort im Widget noch um Margin und Dekorationen reduziert"/>
<node CREATED="1672842924490" ID="ID_1270863386" MODIFIED="1672842931688" TEXT="nur der effektive Wert wird gespeichert"/>
</node>
<node CREATED="1672842936499" ID="ID_493624501" MODIFIED="1672842951923" TEXT="Alignment und Fill-Layout kann das noch modifizieren"/>
</node>
</node>
<node CREATED="1477526858307" ID="ID_676269117" MODIFIED="1557498707239" TEXT="custom widget">
<node COLOR="#ca1b00" CREATED="1477526864162" ID="ID_1385929770" LINK="https://developer.gnome.org/gtkmm-tutorial/stable/sec-custom-widgets.html.en" MODIFIED="1557498707239" TEXT="Beispiel">