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VisualBuilder: Use real GWidgets instead of pretend VBWidgets.

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That first design was the wrong idea. Instead, have VBWidget instantiate
a GWidget of the appropriate type and parent it to the VBForm.
We then use a new "greedy hit-testing" mechanism in GWidget to prevent any
mouse events from reaching the VBForm's children.

To paint the grabbers above the child widgets, I added a slightly hackish
but kind of neat second_paint_event() that is called after a widget has
painted all of his children. :^)
This commit is contained in:
Andreas Kling 2019-04-11 03:34:37 +02:00
parent af070324db
commit c6ffb3e2b8
12 changed files with 94 additions and 87 deletions
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4
Applications/VisualBuilder/VBForm.h
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@ -9,6 +9,9 @@ public:
explicit VBForm(const String& name, GWidget* parent = nullptr);
virtual ~VBForm() override;
String name() const { return m_name; }
void set_name(const String& name) { m_name = name; }
bool is_selected(const VBWidget&) const;
VBWidget* widget_at(const Point&);
@ -17,6 +20,7 @@ public:
protected:
virtual void paint_event(GPaintEvent&) override;
virtual void second_paint_event(GPaintEvent&) override;
virtual void mousedown_event(GMouseEvent&) override;
virtual void mousemove_event(GMouseEvent&) override;
virtual void mouseup_event(GMouseEvent&) override;