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Clip-Drag: now able to detect creation of a new clip widget

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..and thus there is now one dedicated source location,
where configuration of new clip widgets can be done reliably.

So all prerequisites are solved and we can start
building a prototypical drag-gesture implementation
This commit is contained in:
Fischlurch 2021-03-27 14:42:08 +01:00
parent d4b1735013
commit 451673dd09
3 changed files with 33 additions and 7 deletions
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12
src/stage/timeline/clip-presenter.hpp
View file

@ -215,16 +215,26 @@ namespace timeline {
/**
* reevaluate desired presentation mode and available data,
* possibly leading to a changed appearance style of the clip.
* Whenever a new clip widget has been created, this function is also responsible
* for additional setup, and especially to enable the dragging gestures on this clip.
* @remark a typical example would be, when a clip's temporal position, previously unspecified,
* now becomes defined through a diff message. With this data, it becomes feasible
* _actually to show the clip_ in the timeline. Thus the [Appearance style](\ref ClipDelegate::Appearance)
* of the presentation widget (delegate) can be switched up from `PENDING` to `ABRIDGED`.
* @note however this function is invoked from ctor and then serves to allocate the delegate initially.
*/
void
establishAppearance(WidgetHook* newView =nullptr,
optional<TimeSpan> const& timing =nullopt)
{
ClipDelegate::selectAppearance (this->widget_, defaultAppearance, newView, timing);
void* prevDelegate = widget_.get();
auto newAppearance = ClipDelegate::selectAppearance (this->widget_, defaultAppearance, newView, timing);
if (prevDelegate != widget_.get()
and newAppearance > ClipDelegate::DEGRADED)
{// a new dedicated clip widget has been created...
WARN (stage, "configure clip-dragging");
}
}

3
src/stage/timeline/clip-widget.cpp
View file

@ -347,7 +347,7 @@ namespace timeline {
/**
* the default implementation would ask the embedded child widgets;
* however we just force the given size confinement onto them
* @todo 1/21 this kindof works, but produces lots of layout warings
* @todo 1/21 this kindof works, but produces lots of layout warnings
*/
void
get_preferred_width_vfunc(int& minimum_width, int& natural_width) const override
@ -464,6 +464,7 @@ namespace timeline {
}
ENSURE (existing);
return existing->changeAppearance (desired);
// fine-tune appearance style within limits of the mode established
}

25
wiki/thinkPad.ichthyo.mm
View file

@ -32202,7 +32202,8 @@
</node>
</node>
</node>
<node CREATED="1616771214558" ID="ID_1771867762" MODIFIED="1616771231731" TEXT="Problem: Widget-Existenz wird dynamisch gesteuert">
<node COLOR="#435e98" CREATED="1616771214558" ID="ID_1771867762" MODIFIED="1616852161665" TEXT="Problem: Widget-Existenz wird dynamisch gesteuert">
<icon BUILTIN="messagebox_warning"/>
<node CREATED="1616771234015" ID="ID_240157641" MODIFIED="1616771254326" TEXT="relativ autonom">
<node CREATED="1616771255343" ID="ID_620255063" MODIFIED="1616771287475" TEXT="deshalb kann das Subject die Einrichtung nicht fix machen"/>
<node CREATED="1616771294654" ID="ID_334680468" MODIFIED="1616771818181" TEXT="auch der Zeitpunkt ist nicht absolut festgelegt">
@ -32225,7 +32226,8 @@
<icon BUILTIN="messagebox_warning"/>
</node>
</node>
<node CREATED="1616771830690" ID="ID_1923283447" MODIFIED="1616771854190" TEXT="Konsequenz: Setup f&#xfc;r Dragging mu&#xdf; immer wieder erneut erfolgen">
<node COLOR="#435e98" CREATED="1616771830690" ID="ID_1923283447" MODIFIED="1616852149613" TEXT="Konsequenz: Setup f&#xfc;r Dragging mu&#xdf; immer wieder erneut erfolgen">
<icon BUILTIN="yes"/>
<node CREATED="1616771909543" ID="ID_704625942" MODIFIED="1616771922497" TEXT="und zwar genau dann, wenn ein neues Widget geschaffen wurde"/>
<node CREATED="1616772271009" ID="ID_1822723171" MODIFIED="1616772366205" TEXT="Problem: es ist nicht (einfach) m&#xf6;glich, eine bestehende Gesten-Konfiguration zu erkennen">
<richcontent TYPE="NOTE"><html>
@ -32240,7 +32242,8 @@
</html></richcontent>
<icon BUILTIN="messagebox_warning"/>
</node>
<node CREATED="1616771937519" ID="ID_897110549" MODIFIED="1616771965142" TEXT="Aufgabe: diese &#xc4;nderungen zuverl&#xe4;ssig erkennen">
<node COLOR="#338800" CREATED="1616771937519" FOLDED="true" ID="ID_897110549" MODIFIED="1616852141975" TEXT="Aufgabe: diese &#xc4;nderungen zuverl&#xe4;ssig erkennen">
<icon BUILTIN="button_ok"/>
<node CREATED="1616771968190" ID="ID_1961266206" MODIFIED="1616771986228" TEXT="es k&#xf6;nnte onLocalChange() passieren">
<icon BUILTIN="idea"/>
</node>
@ -32310,18 +32313,30 @@
<icon BUILTIN="smiley-neutral"/>
</node>
</node>
<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1616804300325" ID="ID_480439366" MODIFIED="1616804320898" TEXT="auf dieser Basis nun ein neu erzeugtes Widget erkennen">
<icon BUILTIN="flag-yellow"/>
<node COLOR="#338800" CREATED="1616804300325" ID="ID_480439366" MODIFIED="1616852111077" TEXT="auf dieser Basis nun ein neu erzeugtes Widget erkennen">
<icon BUILTIN="button_ok"/>
<node CREATED="1616804350672" ID="ID_1181865023" MODIFIED="1616804359373" TEXT="Kriterien">
<icon BUILTIN="idea"/>
<node CREATED="1616804323416" ID="ID_1065320975" MODIFIED="1616804335337" TEXT="immer wenn sich das Delegate &#xe4;ndert"/>
<node CREATED="1616804336046" ID="ID_438456915" MODIFIED="1616804350049" TEXT="und der neue Stil ein eigentst&#xe4;ndiges Widget rechtfertigt"/>
</node>
<node COLOR="#435e98" CREATED="1616852094050" ID="ID_1854197256" MODIFIED="1616852126061" TEXT="eingebaut und per Log-Meldung verifiziert">
<icon BUILTIN="info"/>
</node>
</node>
</node>
</node>
</node>
<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1616852178983" ID="ID_389047439" MODIFIED="1616852207108" TEXT="Strukturen gem&#xe4;&#xdf; Konzept anlegen">
<icon BUILTIN="flag-yellow"/>
<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1616852190829" ID="ID_1663212368" MODIFIED="1616852206157" TEXT="CmdContext">
<icon BUILTIN="flag-yellow"/>
</node>
<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1616852275162" ID="ID_1272601084" MODIFIED="1616852283276" TEXT="DragRelocateController verwalten">
<icon BUILTIN="flag-yellow"/>
</node>
</node>
</node>
<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1616684916746" ID="ID_571239713" MODIFIED="1616684947088">
<richcontent TYPE="NODE"><html>
<head>