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Demos: Add a little "Mouse" demo for showing mouse button states

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This was very helpful when adding support for 5-button mice! :^)
This commit is contained in:
Andreas Kling 2020-05-02 22:13:54 +02:00
parent 67b92a7d5f
commit b8f778a430
3 changed files with 109 additions and 0 deletions
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100
Demos/Mouse/main.cpp Normal file
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#include <LibGUI/Application.h>
#include <LibGUI/BoxLayout.h>
#include <LibGUI/Frame.h>
#include <LibGUI/Painter.h>
#include <LibGUI/Widget.h>
#include <LibGUI/Window.h>
static unsigned s_mouse_button_state;
class MouseButtonIndicator final : public GUI::Frame {
C_OBJECT(MouseButtonIndicator);
public:
virtual ~MouseButtonIndicator() {}
private:
virtual void paint_event(GUI::PaintEvent& event) override
{
Frame::paint_event(event);
GUI::Painter painter(*this);
painter.add_clip_rect(event.rect());
Color background_color;
Color foreground_color;
if (s_mouse_button_state & m_button) {
background_color = Color::Black;
foreground_color = Color::White;
} else {
background_color = Color::White;
foreground_color = Color::Black;
}
painter.fill_rect(frame_inner_rect(), background_color);
painter.draw_text(frame_inner_rect(), m_name, Gfx::TextAlignment::Center, foreground_color);
}
void mousedown_event(GUI::MouseEvent& event) override
{
event.ignore();
}
void mouseup_event(GUI::MouseEvent& event) override
{
event.ignore();
}
MouseButtonIndicator(const String& name, GUI::MouseButton button)
: m_name(name)
, m_button(button)
{
}
String m_name;
GUI::MouseButton m_button;
};
class MainWidget final : public GUI::Widget {
C_OBJECT(MainWidget);
public:
void mousedown_event(GUI::MouseEvent& event) override
{
s_mouse_button_state = event.buttons();
update();
Widget::mousedown_event(event);
}
void mouseup_event(GUI::MouseEvent& event) override
{
s_mouse_button_state = event.buttons();
update();
Widget::mouseup_event(event);
}
private:
MainWidget() {}
};
int main(int argc, char** argv)
{
GUI::Application app(argc, argv);
auto window = GUI::Window::construct();
window->set_title("Mouse button demo");
auto& main_widget = window->set_main_widget<MainWidget>();
main_widget.set_fill_with_background_color(true);
main_widget.set_layout<GUI::VerticalBoxLayout>();
main_widget.add<MouseButtonIndicator>("Left", GUI::MouseButton::Left);
main_widget.add<MouseButtonIndicator>("Middle", GUI::MouseButton::Middle);
main_widget.add<MouseButtonIndicator>("Right", GUI::MouseButton::Right);
main_widget.add<MouseButtonIndicator>("Back", GUI::MouseButton::Back);
main_widget.add<MouseButtonIndicator>("Forward", GUI::MouseButton::Forward);
window->show();
return app.exec();
}