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5aefd7f828
Painter gains the ability to draw lines with arbitrary thickness. It's basically implemented by drawing filled rects for thickness>1. In PaintBrush, Tool classes can now override on_contextmenu() to provide a context menu for the toolbox button. :^)
68 lines
2 KiB
C++
68 lines
2 KiB
C++
#include "PenTool.h"
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#include "PaintableWidget.h"
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#include <LibGUI/GAction.h>
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#include <LibGUI/GMenu.h>
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#include <LibGUI/GPainter.h>
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PenTool::PenTool()
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{
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}
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PenTool::~PenTool()
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{
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}
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void PenTool::on_mousedown(GMouseEvent& event)
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{
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if (event.button() != GMouseButton::Left && event.button() != GMouseButton::Right)
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return;
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GPainter painter(m_widget->bitmap());
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painter.draw_line(event.position(), event.position(), m_widget->color_for(event), m_thickness);
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m_widget->update();
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m_last_drawing_event_position = event.position();
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}
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void PenTool::on_mouseup(GMouseEvent& event)
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{
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if (event.button() == GMouseButton::Left || event.button() == GMouseButton::Right)
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m_last_drawing_event_position = { -1, -1 };
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}
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void PenTool::on_mousemove(GMouseEvent& event)
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{
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if (!m_widget->rect().contains(event.position()))
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return;
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if (event.buttons() & GMouseButton::Left || event.buttons() & GMouseButton::Right) {
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GPainter painter(m_widget->bitmap());
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if (m_last_drawing_event_position != Point(-1, -1))
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painter.draw_line(m_last_drawing_event_position, event.position(), m_widget->color_for(event), m_thickness);
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else
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painter.draw_line(event.position(), event.position(), m_widget->color_for(event), m_thickness);
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m_widget->update();
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m_last_drawing_event_position = event.position();
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}
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}
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void PenTool::on_contextmenu(GContextMenuEvent& event)
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{
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if (!m_context_menu) {
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m_context_menu = make<GMenu>("PenTool Context Menu");
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m_context_menu->add_action(GAction::create("1", [this](auto&) {
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m_thickness = 1;
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}));
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m_context_menu->add_action(GAction::create("2", [this](auto&) {
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m_thickness = 2;
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}));
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m_context_menu->add_action(GAction::create("3", [this](auto&) {
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m_thickness = 3;
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}));
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m_context_menu->add_action(GAction::create("4", [this](auto&) {
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m_thickness = 4;
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}));
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}
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m_context_menu->popup(event.screen_position());
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}
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