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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* widget.h
*
* Sun Oct 9 13:01:44 CEST 2011
* Copyright 2011 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of DrumGizmo.
*
* DrumGizmo is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* DrumGizmo is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with DrumGizmo; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#pragma once
#include "guievent.h"
#include "pixelbuffer.h"
#include "notifier.h"
#include "layout.h"
#include "canvas.h"
#include <vector>
namespace GUI
{
struct Point
{
int x;
int y;
};
struct Size
{
std::size_t width;
std::size_t height;
};
class ImageCache;
class Window;
class Widget
: public Listener
, public LayoutItem
, public Canvas
{
friend class Painter;
public:
Widget(Widget* parent);
virtual ~Widget();
virtual void show();
virtual void hide();
void setVisible(bool visible);
virtual bool visible() const;
//! Mark widget dirty and shedule redraw on next window redraw.
void redraw();
// From LayoutItem
virtual void resize(std::size_t width, std::size_t height) override;
virtual void move(int x, int y) override;
virtual int x() const override;
virtual int y() const override;
virtual std::size_t width() const override;
virtual std::size_t height() const override;
Point position() const;
// From Canvas
PixelBufferAlpha& GetPixelBuffer() override;
virtual bool isFocusable() { return false; }
virtual bool catchMouse() { return false; }
void addChild(Widget* widget);
void removeChild(Widget* widget);
void reparent(Widget* parent);
virtual void repaintEvent(RepaintEvent* repaintEvent) {}
virtual void mouseMoveEvent(MouseMoveEvent* mouseMoveEvent) {}
virtual void buttonEvent(ButtonEvent* buttonEvent) {}
virtual void scrollEvent(ScrollEvent* scrollEvent) {}
virtual void keyEvent(KeyEvent* keyEvent) {}
virtual void mouseLeaveEvent() {}
virtual void mouseEnterEvent() {}
virtual ImageCache& getImageCache();
Widget* find(int x, int y);
virtual Window* window();
std::vector<PixelBufferAlpha*> getPixelBuffers();
bool hasKeyboardFocus();
Notifier<std::size_t, std::size_t> sizeChangeNotifier; // (width, height)
Notifier<int, int> positionChangeNotifier; // (x, y)
//! Translate x-coordinate from parent-space to window-space.
virtual std::size_t translateToWindowX();
//! Translate y-coordinate from parent-space to window-space.
virtual std::size_t translateToWindowY();
protected:
friend class EventHandler;
PixelBufferAlpha pixbuf{0,0};
std::vector<Widget*> children;
Widget* parent = nullptr;
Window* _window = nullptr;
int _x{0};
int _y{0};
std::size_t _width{0};
std::size_t _height{0};
bool _visible{true};
bool dirty{true};
};
} // GUI::
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