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src/Color.cc

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+// Color.cc for Fluxbox window manager
+// Copyright (c) 2002 Henrik Kinnunen (fluxgen@users.sourceforge.net)
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+// $Id: Color.cc,v 1.1 2002/09/14 12:47:50 fluxgen Exp $
+
+#include "Color.hh"
+
+namespace {
+unsigned char maxValue(unsigned short colval) {
+	if (colval == 65535) 
+		return 0xFF;
+
+	return static_cast<unsigned char>(colval/0xFF);
+}
+
+};
+
+namespace FbTk {
+Color::Color():
+m_allocated(false) {
+
+}
+
+Color::Color(unsigned char red, unsigned char green, unsigned char blue, int screen):
+m_red(red),	m_green(green), m_blue(blue), 
+m_pixel(0), m_allocated(false) { 
+	
+	Display *disp = BaseDisplay::getXDisplay();
+	XColor color;
+	// fill xcolor structure
+	color.red = red;
+	color.blue = blue;
+	color.green = green;
+	
+	if (!XAllocColor(disp, DefaultColormap(disp, screen), &color)) {
+		cerr<<"FbTk::Color: Allocation error."<<endl;
+	} else {
+		setRGB(maxValue(color.red),
+			maxValue(color.green),
+			maxValue(color.blue));
+		setPixel(color.pixel);
+		setAllocated(true);
+	}
+}
+
+Color::Color(const char *color_string, int screen):
+m_allocated(false) {
+	setFromString(color_string, screen);
+}
+
+bool Color::setFromString(const char *color_string, int screen) {
+
+	if (color_string == 0) {
+		free();
+		return false;
+	}
+
+	Display *disp = BaseDisplay::instance()->getXDisplay();
+	Colormap colm = DefaultColormap(disp, screen);
+
+	XColor color;
+
+	if (! XParseColor(disp, colm, color_string, &color))
+		cerr<<"FbTk::Color: Parse color error: \""<<color_string<<"\""<<endl;
+	else if (! XAllocColor(disp, colm, &color))
+		cerr<<"FbTk::Color: Allocation error: \""<<color_string<<"\""<<endl;
+
+
+
+	setPixel(color.pixel);
+	setRGB(maxValue(color.red), 
+		maxValue(color.green),
+		maxValue(color.blue));
+	setAllocated(true);
+
+	return true;
+}
+
+void Color::free() {
+	if (isAllocated()) {
+		unsigned long pixel = col.pixel();
+		XFreeColors(disp, colm, &pixel, 1, 0);
+		setPixel(0);
+		setRGB(0, 0, 0);
+		setAllocated(false);
+	}	
+}
+
+};