1 files changed, 126 insertions, 0 deletions
diff --git a/src/imageplugins/coreplugin/hsl/hspreviewwidget.cpp b/src/imageplugins/coreplugin/hsl/hspreviewwidget.cpp
new file mode 100644
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--- /dev/null
+++ b/src/imageplugins/coreplugin/hsl/hspreviewwidget.cpp
@@ -0,0 +1,126 @@
+/* ============================================================
+ *
+ * This file is a part of digiKam project
+ * http://www.digikam.org
+ *
+ * Date        : 2007-01-08
+ * Description : Hue/Saturation preview widget
+ *
+ * Copyright (C) 2007 by Gilles Caulier <caulier dot gilles at gmail dot com>
+ *
+ * This program 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 2, or (at your option)
+ * any later version.
+ * 
+ * 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.
+ * 
+ * ============================================================ */
+
+// TQt includes.
+
+#include <tqdrawutil.h>
+#include <tqimage.h>
+#include <tqpainter.h>
+#include <tqpixmap.h>
+
+// KDE includes.
+
+#include <tdeapplication.h>
+#include <tdelocale.h>
+#include <kimageeffect.h>
+
+// Local includes.
+
+#include "hslmodifier.h"
+#include "dimg.h"
+#include "hspreviewwidget.h"
+#include "hspreviewwidget.moc"
+
+namespace DigikamImagesPluginCore
+{
+
+class HSPreviewWidgetPrivate
+{
+    
+public:
+
+    HSPreviewWidgetPrivate()
+    {   
+        hue = 0.0;
+        sat = 0.0;
+    }
+
+    int     xBorder;
+
+    double  hue;
+    double  sat;
+
+    TQPixmap pixmap;
+};
+
+HSPreviewWidget::HSPreviewWidget(TQWidget *parent, int xBorder)
+	       : TQWidget(parent, 0, TQt::WDestructiveClose)
+{
+    d = new HSPreviewWidgetPrivate;
+    d->xBorder = xBorder;
+}
+
+HSPreviewWidget::~HSPreviewWidget()
+{
+    delete d;
+}
+
+void HSPreviewWidget::setHS(double hue, double sat)
+{
+    d->hue = hue;
+    d->sat = sat;
+    updatePixmap();
+    update();
+}
+
+void HSPreviewWidget::resizeEvent( TQResizeEvent * )
+{
+    updatePixmap();
+}
+
+void HSPreviewWidget::paintEvent( TQPaintEvent * )
+{
+    bitBlt(this, 0+d->xBorder, 0, &d->pixmap);
+}
+
+void HSPreviewWidget::updatePixmap()
+{
+    int xSize = width()-2*d->xBorder;
+    int ySize = height();
+
+    Digikam::DImg image(xSize, ySize, false, false, 0, false);
+    TQColor col;
+    uint   *p;
+
+    for ( int s = ySize-1; s >= 0; s-- )
+    {
+        p = (uint *)image.scanLine(ySize - s - 1);
+
+        for( int h = 0 ; h < xSize ; h++ )
+        {
+            col.setHsv( 359*h/(xSize-1), 255, 192 );
+            *p = col.rgb();
+            p++;
+        }
+    }
+    
+    Digikam::HSLModifier cmod;
+    cmod.setHue(d->hue);
+    cmod.setSaturation(d->sat);
+    cmod.setLightness(0.0);
+    cmod.applyHSL(image);
+
+    d->pixmap = image.convertToPixmap();
+}
+
+}  // NameSpace DigikamImagesPluginCore