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Mandelbrot: Allow panning with the arrow keys

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This commit is contained in:
ronak69 2023-10-21 14:00:31 +00:00 committed by Andreas Kling
parent 0f33d2a36d
commit 52340dc78a
1 changed files with 40 additions and 0 deletions
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40
Userland/Demos/Mandelbrot/Mandelbrot.cpp
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@ -233,6 +233,8 @@ private:
Mandelbrot() = default;
virtual void paint_event(GUI::PaintEvent&) override;
virtual void keydown_event(GUI::KeyEvent& event) override;
virtual void keyup_event(GUI::KeyEvent& event) override;
virtual void mousedown_event(GUI::MouseEvent& event) override;
virtual void mousemove_event(GUI::MouseEvent& event) override;
virtual void mouseup_event(GUI::MouseEvent& event) override;
@ -298,6 +300,44 @@ void Mandelbrot::paint_event(GUI::PaintEvent& event)
painter.draw_rect(Gfx::IntRect::from_two_points(m_selection_start, m_selection_end), Color::Blue);
}
void Mandelbrot::keydown_event(GUI::KeyEvent& event)
{
switch (event.key()) {
case KeyCode::Key_Left:
m_set.pan_by(Gfx::IntPoint { 10, 0 });
break;
case KeyCode::Key_Right:
m_set.pan_by(Gfx::IntPoint { -10, 0 });
break;
case KeyCode::Key_Up:
m_set.pan_by(Gfx::IntPoint { 0, 10 });
break;
case KeyCode::Key_Down:
m_set.pan_by(Gfx::IntPoint { 0, -10 });
break;
default:
GUI::Widget::keydown_event(event);
return;
}
m_panning = true;
update();
}
void Mandelbrot::keyup_event(GUI::KeyEvent& event)
{
switch (event.key()) {
case KeyCode::Key_Left:
case KeyCode::Key_Right:
case KeyCode::Key_Up:
case KeyCode::Key_Down:
m_panning = false;
break;
default:
GUI::Widget::keydown_event(event);
}
}
void Mandelbrot::mousedown_event(GUI::MouseEvent& event)
{
if (event.button() == GUI::MouseButton::Primary) {