mirror of
https://github.com/UberGames/GtkRadiant.git
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12b372f89c
git-svn-id: svn://svn.icculus.org/gtkradiant/GtkRadiant@1 8a3a26a2-13c4-0310-b231-cf6edde360e5
125 lines
3 KiB
C++
125 lines
3 KiB
C++
/*
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Copyright (C) 2001-2006, William Joseph.
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All Rights Reserved.
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This file is part of GtkRadiant.
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GtkRadiant is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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GtkRadiant is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GtkRadiant; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#if !defined (INCLUDED_XORRECTANGLE_H)
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#define INCLUDED_XORRECTANGLE_H
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#include <gtk/gtkwidget.h>
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#include "math/vector.h"
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class rectangle_t
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{
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public:
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rectangle_t()
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: x(0), y(0), w(0), h(0)
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{}
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rectangle_t(float _x, float _y, float _w, float _h)
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: x(_x), y(_y), w(_w), h(_h)
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{}
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float x;
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float y;
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float w;
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float h;
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};
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struct Coord2D
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{
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float x, y;
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Coord2D(float _x, float _y)
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: x(_x), y(_y)
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{
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}
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};
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inline Coord2D coord2d_device2screen(const Coord2D& coord, unsigned int width, unsigned int height)
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{
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return Coord2D(((coord.x + 1.0f) * 0.5f) * width, ((coord.y + 1.0f) * 0.5f) * height);
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}
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inline rectangle_t rectangle_from_area(const float min[2], const float max[2], unsigned int width, unsigned int height)
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{
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Coord2D botleft(coord2d_device2screen(Coord2D(min[0], min[1]), width, height));
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Coord2D topright(coord2d_device2screen(Coord2D(max[0], max[1]), width, height));
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return rectangle_t(botleft.x, botleft.y, topright.x - botleft.x, topright.y - botleft.y);
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}
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class XORRectangle
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{
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rectangle_t m_rectangle;
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GtkWidget* m_widget;
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GdkGC* m_gc;
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bool initialised() const
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{
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return m_gc != 0;
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}
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void lazy_init()
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{
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if(!initialised())
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{
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m_gc = gdk_gc_new(m_widget->window);
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GdkColor color = { 0, 0xffff, 0xffff, 0xffff, };
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GdkColormap* colormap = gdk_window_get_colormap(m_widget->window);
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gdk_colormap_alloc_color (colormap, &color, FALSE, TRUE);
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gdk_gc_copy(m_gc, m_widget->style->white_gc);
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gdk_gc_set_foreground(m_gc, &color);
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gdk_gc_set_background(m_gc, &color);
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gdk_gc_set_function(m_gc, GDK_INVERT);
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}
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}
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void draw() const
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{
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const int x = float_to_integer(m_rectangle.x);
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const int y = float_to_integer(m_rectangle.y);
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const int w = float_to_integer(m_rectangle.w);
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const int h = float_to_integer(m_rectangle.h);
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gdk_draw_rectangle(m_widget->window, m_gc, FALSE, x, -(h) - (y - m_widget->allocation.height), w, h);
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}
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public:
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XORRectangle(GtkWidget* widget) : m_widget(widget), m_gc(0)
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{
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}
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~XORRectangle()
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{
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if(initialised())
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{
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gdk_gc_unref(m_gc);
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}
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}
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void set(rectangle_t rectangle)
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{
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if(GTK_WIDGET_REALIZED(m_widget))
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{
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lazy_init();
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draw();
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m_rectangle = rectangle;
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draw();
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}
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}
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};
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#endif
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