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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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7
Libraries/LibGUI/GRadioButton.cpp
View file

@ -1,12 +1,17 @@
#include <LibDraw/GraphicsBitmap.h>
#include <LibGUI/GPainter.h>
#include <LibGUI/GRadioButton.h>
#include <LibDraw/GraphicsBitmap.h>
static RefPtr<GraphicsBitmap> s_unfilled_circle_bitmap;
static RefPtr<GraphicsBitmap> s_filled_circle_bitmap;
static RefPtr<GraphicsBitmap> s_changing_filled_circle_bitmap;
static RefPtr<GraphicsBitmap> s_changing_unfilled_circle_bitmap;
GRadioButton::GRadioButton(GWidget* parent)
: GRadioButton({}, parent)
{
}
GRadioButton::GRadioButton(const StringView& text, GWidget* parent)
: GAbstractButton(text, parent)
{