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Demos: Add ability to use scroll wheel in starfield

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This change adds the ability to use the scroll wheel to change
the speed in starfield.
This commit is contained in:
HawDevelopment 2022-12-28 11:54:51 +01:00 • committed by Tim Flynn
parent e8e1d1905e
commit a21703f1df
1 changed files with 11 additions and 0 deletions
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11
Userland/Demos/Starfield/Starfield.cpp
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@ -46,6 +46,7 @@ private:
virtual void paint_event(GUI::PaintEvent&) override; virtual void paint_event(GUI::PaintEvent&) override;
virtual void timer_event(Core::TimerEvent&) override; virtual void timer_event(Core::TimerEvent&) override;
virtual void keydown_event(GUI::KeyEvent&) override; virtual void keydown_event(GUI::KeyEvent&) override;
virtual void mousewheel_event(GUI::MouseEvent&) override;
Vector<Coordinate> m_stars; Vector<Coordinate> m_stars;
int m_sweep_plane = 2000; int m_sweep_plane = 2000;
@ -89,6 +90,16 @@ void Starfield::keydown_event(GUI::KeyEvent& event)
} }
} }
void Starfield::mousewheel_event(GUI::MouseEvent& event)
{
if (event.wheel_delta_y() == 0)
return;
m_speed += event.wheel_delta_y() > 0 ? -1 : 1;
if (m_speed < 1)
m_speed = 1;
}
void Starfield::paint_event(GUI::PaintEvent& event) void Starfield::paint_event(GUI::PaintEvent& event)
{ {
GUI::Painter painter(*this); GUI::Painter painter(*this);