Added KDE3 moodin engine

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/ksplash-engine-moodin@1094437 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 165 insertions, 0 deletions

diff --git a/src/effectwidget.cpp b/src/effectwidget.cpp
new file mode 100644
index 0000000..1a2804a
--- /dev/null
+++ b/src/effectwidget.cpp
@@ -0,0 +1,165 @@
+/***************************************************************************
+ *   Copyright Sean Meiners 2004 <Sean.Meiners@LinspireInc.com>            *
+ *   Copyright (C) by                                                      *
+ *     - 2005: Christian Leh <moodwrod@web.de>                             *
+ *                                                                         * 
+ *   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. (The original KSplash/ML   *
+ *   codebase (upto version 0.95.3) is BSD-licensed.)                      *
+ *                                                                         *
+ ***************************************************************************/
+
+#include <qwidget.h>
+#include <qstyle.h>
+#include <qtimer.h>
+#include <qpainter.h>
+#include <qimage.h>
+
+#include "effectwidget.h"
+
+QImage* EffectWidget::bgImage = 0;
+
+EffectWidget::EffectWidget(QWidget* parent, const char* name)
+           :QWidget(parent, name)
+{
+  timer = 0;
+  delayMS = 20;
+  currentStep = 0;
+  totalSteps = 0;
+  playing = false;
+  loop = false;
+  beginOpacity = 20.0;
+  endOpacity = 80.0;
+  setBackgroundMode(NoBackground);
+  setBackgroundOrigin(QWidget::ParentOrigin);
+  updateCache();
+}
+
+
+void EffectWidget::setImage(QImage *i)
+{
+  image = i;
+}
+
+
+void EffectWidget::setDelay(int delayInMS)
+{
+  delayMS = delayInMS;
+
+  if (timer)
+    timer->changeInterval(delayMS);
+}
+
+
+void EffectWidget::setLoop(bool loop)
+{
+  this->loop = loop;
+}
+
+
+void EffectWidget::setSteps(int steps)
+{
+  totalSteps = steps;
+}
+
+
+void EffectWidget::start()
+{
+  if ((playing) || (!image) || (totalSteps < 1) || (image->isNull()))
+    return;
+
+  if (!timer)
+  {
+    timer = new QTimer(this);
+    connect(timer,SIGNAL(timeout()),this,SLOT(timerTick()));
+  }
+  
+  playing = true;
+  update();
+  timer->start(delayMS);
+}
+
+
+void EffectWidget::stop()
+{
+  if ((!playing) || (!timer))
+    return;
+
+  timer->stop();
+  playing = false;
+}
+
+
+void EffectWidget::setStart(float begin, float end, bool reverse)
+{
+  beginOpacity = begin;
+  endOpacity = end - beginOpacity;
+
+  if (reverse)
+  {
+    float h = beginOpacity;
+    beginOpacity = endOpacity;
+    endOpacity = h;
+  }
+}
+
+
+void EffectWidget::rewind()
+{
+  stop();
+  currentStep = 0;
+}
+
+
+void EffectWidget::timerTick()
+{
+  if (loop)
+  {
+    currentStep ++;
+    currentStep %= totalSteps;
+  }
+  else if (currentStep + 1 < totalSteps)
+    currentStep ++;
+  else
+    timer->stop();
+
+  update();
+}
+
+
+void EffectWidget::moveEvent(QMoveEvent *)
+{
+  updateCache();
+}
+
+
+void EffectWidget::resizeEvent(QResizeEvent *)
+{
+  updateCache();
+}
+
+
+void EffectWidget::updateCache()
+{
+  if (!bgImage)
+    return;
+
+  QPoint pos(mapToParent(QPoint(0, 0)));
+  background = bgImage->copy(pos.x(), pos.y(), width(), height());
+  bitBlt(this, 0, 0, &background);
+}
+
+void EffectWidget::paintEvent(QPaintEvent *)
+{
+  if (background.isNull())
+    return;
+
+  QImage upper = image->copy();
+  QImage lower = background.copy();
+  KImageEffect::blendOnLower(upper, lower, KImageEffect::Centered, (currentStep + 1 == totalSteps) ? 1.0 : endOpacity / float(totalSteps) * float(currentStep) + beginOpacity);
+
+  bitBlt(this, 0, 0, &lower);
+}
+
+#include "effectwidget.moc"