Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdebase@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 166 insertions, 0 deletions

diff --git a/kcontrol/style/menupreview.cpp b/kcontrol/style/menupreview.cpp
new file mode 100644
index 000000000..a8a74c981
--- /dev/null
+++ b/kcontrol/style/menupreview.cpp
@@ -0,0 +1,166 @@
+/*
+ * Menu Transparency Preview Widget
+ * Copyright (C) 2002 Karol Szwed <gallium@kde.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License version 2 as published by the Free Software Foundation.
+ *
+ * This program 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 this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "menupreview.h"
+
+#include <qpainter.h>
+#include <qimage.h>
+
+#include <kpixmap.h>
+#include <kpixmapeffect.h>
+#include <klocale.h>
+#include <kimageeffect.h>
+#include <kiconloader.h>
+
+
+MenuPreview::MenuPreview( QWidget* parent, int opacity, PreviewMode pvm )
+	: QWidget( parent, 0, WStyle_Customize | WRepaintNoErase ),
+	pixBackground(NULL), pixOverlay(NULL), pixBlended(NULL)
+{
+	setFixedSize(150, 150);
+	setFocusPolicy( NoFocus );
+
+	mode = pvm;
+	if (opacity < 0)   opacity = 0;
+	if (opacity > 100) opacity = 100;
+	menuOpacity = opacity/100.0;
+
+	pixBackground = new KPixmap();
+	pixOverlay = new KPixmap();
+	pixBlended = new KPixmap();
+
+	createPixmaps();
+	blendPixmaps();
+}
+
+MenuPreview::~MenuPreview()
+{
+	delete pixBackground;
+	delete pixOverlay;
+	delete pixBlended;
+}
+
+void MenuPreview::createPixmaps()
+{
+	int w = width()-2;
+	int h = height()-2;
+
+	if (pixBackground)
+		pixBackground->resize( w, h );
+	if (pixOverlay)
+		pixOverlay->resize( w, h );	
+	if (pixBlended)
+		pixBlended->resize( w, h );
+	
+	QColorGroup cg = colorGroup();
+	QColor c1 = cg.background();
+	QColor c2 = cg.mid();
+
+	if (pixBackground) {
+		// Paint checkerboard
+		QPainter p;
+		p.begin(pixBackground);
+		for(int x=0; x < pixBackground->width(); x+=5)
+			for(int y=0; y < pixBackground->height(); y+=5)
+				p.fillRect( x, y, 5, 5, 
+								 (x % 2) ? 
+								((y % 2) ?  c2 : c1  ) : 	// See the grid? ;-)
+								((y % 2) ?  c1 : c2  ) );	
+		KIconLoader* icl = KGlobal::iconLoader();
+		QPixmap pix = icl->loadIcon("go", KIcon::Desktop, KIcon::SizeLarge, KIcon::ActiveState);
+		p.drawPixmap( (width()-2-pix.width())/2, (height()-2-pix.height())/2, pix );
+	}
+
+	if (pixOverlay) {
+		c1 = cg.button().light(110);
+		c2 = cg.button().dark(110);
+		KPixmapEffect::gradient( *pixOverlay, c1, c2, KPixmapEffect::VerticalGradient );
+	}
+}
+
+void MenuPreview::blendPixmaps()
+{
+	// Rebuild pixmaps, and repaint
+	if (pixBlended && pixBackground) 
+	{
+		if (mode == Blend && pixOverlay) {
+			QImage src = pixOverlay->convertToImage();
+			QImage dst = pixBackground->convertToImage();
+			KImageEffect::blend(src, dst, menuOpacity);
+			pixBlended->convertFromImage( dst );
+		} else if (mode == Tint) {
+			QColor clr = colorGroup().button();
+			QImage dst = pixBackground->convertToImage();
+			KImageEffect::blend(clr, dst, menuOpacity);
+			pixBlended->convertFromImage( dst );
+		}
+	}
+}
+
+void MenuPreview::setOpacity( int opacity )
+{
+	if (opacity < 0 || opacity > 100)
+		return;
+
+	if ((int)(menuOpacity*100) != opacity) {
+		menuOpacity = opacity/100.0;
+		blendPixmaps();
+		repaint( false );
+	}
+}
+
+void MenuPreview::setPreviewMode( PreviewMode pvm )
+{
+	if (mode != pvm) {
+		mode = pvm;
+		blendPixmaps();
+		repaint( false );
+	}
+}
+
+void MenuPreview::paintEvent( QPaintEvent* /* pe */ )
+{
+	// Paint the frame and blended pixmap
+	QColorGroup cg = colorGroup();
+	int x2 = width()-1;
+	int y2 = height()-1;
+
+	QPainter p(this);
+	p.setPen(cg.dark());
+	p.drawLine(0, 0, x2, 0);
+	p.drawLine(0, 0, 0, y2);
+	p.setPen(cg.light());
+	p.drawLine(1, y2, x2, y2);
+	p.drawLine(x2, 1, x2, y2);
+
+	if (mode == NoEffect)
+		p.fillRect(1, 1, --x2, --y2, cg.button());
+	else if (mode != NoEffect && pixBlended)
+		p.drawPixmap(1, 1, *pixBlended, 0, 0, --x2, --y2);
+
+	QRect r = rect();
+	r.moveBy(6,3);
+	p.setPen( cg.text() );
+	p.drawText( r, AlignTop | AlignLeft, QString::number((int)(menuOpacity*100))+i18n("%") );
+}
+
+#include "menupreview.moc"
+
+// vim: set noet ts=4:
+