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PaintBrush: Factor out the pen tool into an actual PenTool class.

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Also add a Tool base class, and an empty BucketTool subclass which is the
next thing to implement.
This commit is contained in:
Andreas Kling 2019-06-14 18:51:57 +02:00
parent a12751695e
commit 56cbe15033
10 changed files with 185 additions and 33 deletions
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41
Applications/PaintBrush/PaintableWidget.cpp
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@ -1,10 +1,20 @@
#include "PaintableWidget.h"
#include "Tool.h"
#include <LibGUI/GPainter.h>
#include <SharedGraphics/GraphicsBitmap.h>
static PaintableWidget* s_the;
PaintableWidget& PaintableWidget::the()
{
return *s_the;
}
PaintableWidget::PaintableWidget(GWidget* parent)
: GWidget(parent)
{
ASSERT(!s_the);
s_the = this;
set_fill_with_background_color(true);
set_background_color(Color::MidGray);
m_bitmap = GraphicsBitmap::create(GraphicsBitmap::Format::RGB32, { 600, 400 });
@ -33,37 +43,18 @@ Color PaintableWidget::color_for(const GMouseEvent& event)
void PaintableWidget::mousedown_event(GMouseEvent& event)
{
if (event.button() != GMouseButton::Left && event.button() != GMouseButton::Right)
return;
GPainter painter(*m_bitmap);
painter.set_pixel(event.position(), color_for(event));
update({ event.position(), { 1, 1 } });
m_last_drawing_event_position = event.position();
if (m_tool)
m_tool->on_mousedown(*this, event);
}
void PaintableWidget::mouseup_event(GMouseEvent& event)
{
if (event.button() == GMouseButton::Left || event.button() == GMouseButton::Right)
m_last_drawing_event_position = { -1, -1 };
if (m_tool)
m_tool->on_mouseup(*this, event);
}
void PaintableWidget::mousemove_event(GMouseEvent& event)
{
if (!rect().contains(event.position()))
return;
if (event.buttons() & GMouseButton::Left || event.buttons() & GMouseButton::Right) {
GPainter painter(*m_bitmap);
if (m_last_drawing_event_position != Point(-1, -1)) {
painter.draw_line(m_last_drawing_event_position, event.position(), color_for(event));
update();
} else {
painter.set_pixel(event.position(), color_for(event));
update({ event.position(), { 1, 1 } });
}
m_last_drawing_event_position = event.position();
}
if (m_tool)
m_tool->on_mousemove(*this, event);
}