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Code Issues Activity Actions

PaintBrush: Use draw_line() when drawing continuously.

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This commit is contained in:
Andreas Kling 2019-06-10 19:35:24 +02:00
parent 6aa4cb6740
commit 642c82fbff
2 changed files with 15 additions and 3 deletions
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17
Applications/PaintBrush/PaintableWidget.cpp
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@ -30,10 +30,13 @@ void PaintableWidget::mousedown_event(GMouseEvent& event)
GPainter painter(*m_bitmap); GPainter painter(*m_bitmap);
painter.set_pixel(event.position(), Color::Black); painter.set_pixel(event.position(), Color::Black);
update({ event.position(), { 1, 1 } }); update({ event.position(), { 1, 1 } });
m_last_drawing_event_position = event.position();
} }
void PaintableWidget::mouseup_event(GMouseEvent&) void PaintableWidget::mouseup_event(GMouseEvent& event)
{ {
if (event.button() == GMouseButton::Left)
m_last_drawing_event_position = { -1, -1 };
} }
void PaintableWidget::mousemove_event(GMouseEvent& event) void PaintableWidget::mousemove_event(GMouseEvent& event)
@ -43,7 +46,15 @@ void PaintableWidget::mousemove_event(GMouseEvent& event)
if (event.buttons() & GMouseButton::Left) { if (event.buttons() & GMouseButton::Left) {
GPainter painter(*m_bitmap); GPainter painter(*m_bitmap);
painter.set_pixel(event.position(), Color::Black);
update({ event.position(), { 1, 1 } }); if (m_last_drawing_event_position != Point(-1, -1)) {
painter.draw_line(m_last_drawing_event_position, event.position(), Color::Black);
update();
} else {
painter.set_pixel(event.position(), Color::Black);
update({ event.position(), { 1, 1 } });
}
m_last_drawing_event_position = event.position();
} }
} }

1
Applications/PaintBrush/PaintableWidget.h
View file

@ -15,5 +15,6 @@ private:
virtual void mouseup_event(GMouseEvent&) override; virtual void mouseup_event(GMouseEvent&) override;
virtual void mousemove_event(GMouseEvent&) override; virtual void mousemove_event(GMouseEvent&) override;
Point m_last_drawing_event_position { -1, -1 };
RetainPtr<GraphicsBitmap> m_bitmap; RetainPtr<GraphicsBitmap> m_bitmap;
}; };