Added color history singleton class.

2014-07-09 21:15:42 -04:00
parent 6c8b49f1e6
commit e689c9a24a
3 changed files with 205 additions and 0 deletions
@@ -0,0 +1,119 @@
+/*  ColorHistory.cpp
+ *
+ *  Copyright (C) 2014  Jim Evins <evins@snaught.com>
+ *
+ *  This file is part of gLabels-qt.
+ *
+ *  gLabels-qt is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  gLabels-qt 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with gLabels-qt.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "ColorHistory.h"
+
+#include <QSettings>
+
+
+namespace glabels
+{
+
+	ColorHistory::ColorHistory()
+	{
+	}
+
+
+	ColorHistory* ColorHistory::instance()
+	{
+		static ColorHistory* singletonInstance = 0;
+
+		if ( singletonInstance == 0 )
+		{
+			singletonInstance = new ColorHistory();
+		}
+
+		return singletonInstance;
+	}
+
+
+	void ColorHistory::addColor( const QColor &color )
+	{
+		QColor oldColors[MAX_COLORS];
+		QColor newColors[MAX_COLORS];
+		int n;
+
+		readColorArray( oldColors, n );
+
+		int i;
+		newColors[0] = color;
+		for ( i = 0; ( i < (MAX_COLORS-1) ) && (i < n); i++ )
+		{
+			newColors[i+1] = oldColors[i];
+		}
+
+		writeColorArray( newColors, i+1 );
+		emit changed();
+	}
+
+
+	QColor ColorHistory::getColor( int i )
+	{
+		QColor colors[MAX_COLORS];
+		int n;
+
+		if ( (n > 0) && (i < n) )
+		{
+			return colors[i];
+		}
+		else
+		{
+			return QColor( 0, 0, 0, 0 );
+		}
+	}
+
+
+	void ColorHistory::readColorArray( QColor array[MAX_COLORS], int& n )
+	{
+		QSettings settings;
+
+		settings.beginGroup( "ColorHistory" );
+
+		settings.beginReadArray( "history" );
+		n = settings.value( "history/size", 0 ).toInt();
+		for ( int i = 0; i < n; i++ )
+		{
+			settings.setArrayIndex(i);
+			array[i] = settings.value( "color" ).value<QColor>();
+		}
+		settings.endArray();
+
+		settings.endGroup();
+	}
+
+
+	void ColorHistory::writeColorArray( const QColor array[MAX_COLORS], int n )
+	{
+		QSettings settings;
+
+		settings.beginGroup( "ColorHistory" );
+
+		settings.beginWriteArray( "history" );
+		for ( int i = 0; (i < n) && (i < MAX_COLORS); i++ )
+		{
+			settings.setArrayIndex(i);
+			settings.setValue( "color", array[i] );
+		}
+		settings.endArray();
+
+		settings.endGroup();
+	}
+
+}