From 645250e1cd8ce9bc1faea599df7a1b05836bfeb8 Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Tue, 29 Dec 2020 16:09:43 +0100
Subject: Split UI code into application/plugin UI and UI library.

---
 dggui/widget.h | 139 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 139 insertions(+)
 create mode 100644 dggui/widget.h

(limited to 'dggui/widget.h')

diff --git a/dggui/widget.h b/dggui/widget.h
new file mode 100644
index 0000000..b9436b7
--- /dev/null
+++ b/dggui/widget.h
@@ -0,0 +1,139 @@
+/* -*- 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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