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LibGUI: Add a simple GWidget class registry/factory

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You can now register a GWidget subclass with REGISTER_GWIDGET(class)
and it will be available for factory construction through the new
GWidgetClassRegistration interface.

To obtain a GWidgetClassRegistration for a given class name, you call
GWidgetClassRegistration::find(class_name). You can also iterate over
all the registered classes using GWCR::for_each(callback).

This will be very useful for implementing a proper GUI designer, and
also in the future for things like script bindings.

NOTE: All of the registrations are done in GWidget.cpp at the moment
since I ran into trouble with the fricken linker pruning the global
constructors this mechanism relies on. :^)
This commit is contained in:
Andreas Kling 2019-11-10 10:58:03 +01:00
parent a353d16ff4
commit ca538b6cee
10 changed files with 109 additions and 8 deletions
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3
Libraries/LibGUI/GTextEditor.h
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@ -102,7 +102,8 @@ public:
void set_cursor(const GTextPosition&);
protected:
GTextEditor(Type, GWidget* parent);
explicit GTextEditor(GWidget* parent);
explicit GTextEditor(Type, GWidget* parent);
virtual void did_change_font() override;
virtual void paint_event(GPaintEvent&) override;