Split UI code into application/plugin UI and UI library.

1 files changed, 297 insertions, 0 deletions

diff --git a/dggui/widget.cc b/dggui/widget.cc
new file mode 100644
index 0000000..da6b1e2
--- /dev/null
+++ b/dggui/widget.cc
@@ -0,0 +1,297 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            widget.cc
+ *
+ *  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.
+ */
+#include "widget.h"
+
+#include <cassert>
+
+#include "painter.h"
+#include "window.h"
+
+namespace GUI
+{
+
+Widget::Widget(Widget* parent)
+	: parent(parent)
+{
+	if(parent)
+	{
+		parent->addChild(this);
+		_window = parent->window();
+	}
+
+	pixbuf.x = translateToWindowX();
+	pixbuf.y = translateToWindowY();
+}
+
+Widget::~Widget()
+{
+	if(parent)
+	{
+		parent->removeChild(this);
+	}
+}
+
+void Widget::show()
+{
+	setVisible(true);
+}
+
+void Widget::hide()
+{
+	setVisible(false);
+}
+
+void Widget::setVisible(bool visible)
+{
+	_visible = visible;
+	pixbuf.visible = visible;
+	redraw();
+}
+
+bool Widget::visible() const
+{
+	return _visible;
+}
+
+void Widget::redraw()
+{
+	dirty = true;
+	window()->needsRedraw();
+}
+
+void Widget::addChild(Widget* widget)
+{
+	children.push_back(widget);
+}
+
+void Widget::removeChild(Widget* widget)
+{
+	for(auto i = children.begin(); i != children.end(); ++i)
+	{
+		if(*i == widget)
+		{
+			children.erase(i);
+			return;
+		}
+	}
+}
+
+void Widget::reparent(Widget* parent)
+{
+	if(parent == this->parent)
+	{
+		return; // Already at the right parent.
+	}
+
+	if(this->parent)
+	{
+		this->parent->removeChild(this);
+	}
+
+	if(parent)
+	{
+		parent->addChild(this);
+	}
+
+	this->parent = parent;
+}
+
+void Widget::resize(std::size_t width, std::size_t height)
+{
+	assert(width < 32000 && height < 32000); // Catch negative values as size_t
+	if((width < 1) || (height < 1) ||
+	   ((width == _width) && (height == _height)))
+	{
+		return;
+	}
+
+	_width = width;
+	_height = height;
+
+	// Store old size/position in pixelbuffer for rendering invalidation.
+	if(!pixbuf.has_last)
+	{
+		pixbuf.last_width = pixbuf.width;
+		pixbuf.last_height = pixbuf.height;
+		pixbuf.last_x = pixbuf.x;
+		pixbuf.last_y = pixbuf.y;
+		pixbuf.has_last = true;
+	}
+
+	pixbuf.realloc(width, height);
+	pixbuf.x = translateToWindowX();
+	pixbuf.y = translateToWindowY();
+	redraw();
+	sizeChangeNotifier(width, height);
+}
+
+void Widget::move(int x, int y)
+{
+	if((_x == x) &&
+	   (_y == y))
+	{
+		return;
+	}
+
+	_x = x;
+	_y = y;
+
+	// Store old size/position in pixelbuffer for rendering invalidation.
+	if(!pixbuf.has_last)
+	{
+		pixbuf.last_width = pixbuf.width;
+		pixbuf.last_height = pixbuf.height;
+		pixbuf.last_x = pixbuf.x;
+		pixbuf.last_y = pixbuf.y;
+		pixbuf.has_last = true;
+	}
+
+	//pixbuf.x = translateToWindowX();
+	//pixbuf.y = translateToWindowY();
+
+	positionChangeNotifier(x, y);
+}
+
+int Widget::x() const
+{
+	return _x;
+}
+
+int Widget::y() const
+{
+	return _y;
+}
+
+std::size_t Widget::width() const
+{
+	return _width;
+}
+
+std::size_t Widget::height() const
+{
+	return _height;
+}
+
+Point Widget::position() const
+{
+	return { _x, _y };
+}
+
+PixelBufferAlpha& Widget::getPixelBuffer()
+{
+	return pixbuf;
+}
+
+ImageCache& Widget::getImageCache()
+{
+	assert(parent);
+	return parent->getImageCache();
+}
+
+Widget* Widget::find(int x, int y)
+{
+	for(auto i = children.rbegin(); i != children.rend(); ++i)
+	{
+		Widget* widget = *i;
+		if(widget->visible())
+		{
+			if((x >= widget->x()) && (x < (widget->x() + (int)widget->width())) &&
+			   (y >= widget->y()) && (y < (widget->y() + (int)widget->height())))
+			{
+				return widget->find(x - widget->x(), y - widget->y());
+			}
+		}
+	}
+
+	return this;
+}
+
+Window* Widget::window()
+{
+	return _window;
+}
+
+std::vector<PixelBufferAlpha*> Widget::getPixelBuffers()
+{
+	std::vector<PixelBufferAlpha*> pixelBuffers;
+
+	pixbuf.x = translateToWindowX();
+	pixbuf.y = translateToWindowY();
+
+	if(dirty)
+	{
+		repaintEvent(nullptr);
+		pixbuf.dirty = true;
+		dirty = false;
+	}
+
+	if(pixbuf.dirty || visible())
+	{
+		pixelBuffers.push_back(&pixbuf);
+	}
+
+	if(visible())
+	{
+		for(auto child : children)
+		{
+			auto childPixelBuffers = child->getPixelBuffers();
+			pixelBuffers.insert(pixelBuffers.end(),
+			                    childPixelBuffers.begin(), childPixelBuffers.end());
+		}
+	}
+
+	return pixelBuffers;
+}
+
+bool Widget::hasKeyboardFocus()
+{
+	return window()->keyboardFocus() == this;
+}
+
+std::size_t Widget::translateToWindowX()
+{
+	size_t window_x = x();
+	if(parent)
+	{
+		window_x += parent->translateToWindowX();
+	}
+
+	return window_x;
+}
+
+std::size_t Widget::translateToWindowY()
+{
+	size_t window_y = y();
+	if(parent)
+	{
+		window_y += parent->translateToWindowY();
+	}
+
+	return window_y;
+}
+
+} // GUI::