From fe2be78491ab016a9ffb6f5d61d447c4bb88583e Mon Sep 17 00:00:00 2001
From: Robert Knight <robertknight@gmail.com>
Date: Tue, 19 Jun 2007 19:48:58 +0000
Subject: [PATCH] Animated entry of color schemes in the list.

svn path=/trunk/KDE/kdebase/apps/konsole/; revision=677729
---
 src/EditProfileDialog.cpp | 43 ++++++++++++++++++++++++++++++++++++++-
 src/EditProfileDialog.h   | 19 +++++++++++++++++
 2 files changed, 61 insertions(+), 1 deletion(-)

diff --git a/src/EditProfileDialog.cpp b/src/EditProfileDialog.cpp
index 2b29956b4..1b49aacb4 100644
--- a/src/EditProfileDialog.cpp
+++ b/src/EditProfileDialog.cpp
@@ -31,6 +31,8 @@
 #include <QtGui/QLinearGradient>
 #include <QtGui/QRadialGradient>
 
+#include <QtCore/QTimeLine>
+
 // KDE
 #include <kcodecaction.h>
 #include <KFontDialog>
@@ -314,7 +316,15 @@ void EditProfileDialog::setupAppearancePage(const Profile* info)
     // setup color list
     updateColorSchemeList();
 
-    _ui->colorSchemeList->setItemDelegate(new ColorSchemeViewDelegate(this));
+    ColorSchemeViewDelegate* delegate = new ColorSchemeViewDelegate(this);
+
+    QTimeLine* timeLine = new QTimeLine( 1000 , this );
+    delegate->setEntryTimeLine(timeLine);
+
+    connect( timeLine , SIGNAL(valueChanged(qreal)) , this ,
+             SLOT(colorSchemeAnimationUpdate()) );
+
+    _ui->colorSchemeList->setItemDelegate(delegate);
     _ui->colorSchemeList->setMouseTracking(true);
     _ui->colorSchemeList->installEventFilter(this);
 
@@ -341,6 +351,16 @@ void EditProfileDialog::setupAppearancePage(const Profile* info)
              SLOT(setFontSize(int)) );
     connect( _ui->editFontButton , SIGNAL(clicked()) , this ,
              SLOT(showFontDialog()) );
+
+    // start entry animation
+    timeLine->start();
+}
+void EditProfileDialog::colorSchemeAnimationUpdate()
+{
+    QAbstractItemModel* model = _ui->colorSchemeList->model();
+
+    for ( int i = model->rowCount() ; i >= 0 ; i-- )
+        _ui->colorSchemeList->update( model->index(i,0) );
 }
 void EditProfileDialog::updateFontPreviewLabel(const QFont& font)
 {
@@ -926,9 +946,30 @@ QWidget* ColorSchemeViewDelegate::createEditor(QWidget* parent, const QStyleOpti
 }
 #endif
 
+void ColorSchemeViewDelegate::setEntryTimeLine(QTimeLine* timeLine)
+{
+    _entryTimeLine = timeLine;
+}
+
 void ColorSchemeViewDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option,
                        const QModelIndex& index) const
 {
+    // entry animation
+    //
+    // note that the translation occurs for each item drawn, but the 
+    // painter is not reset between painting items.  this means that when
+    // the items are painted in order ( as occurs when the list is first
+    // shown ), there is a visually pleasing staggering of items as they
+    // enter.
+    if ( _entryTimeLine != 0 )
+    {
+        qreal value = 1.0-_entryTimeLine->currentValue();
+        painter->translate(  value * 
+                             option.rect.width() , 0 );
+
+        painter->setOpacity( _entryTimeLine->currentValue() );
+    }
+
     const ColorScheme* scheme = index.data(Qt::UserRole + 1).value<const ColorScheme*>();
 
     Q_ASSERT(scheme);
diff --git a/src/EditProfileDialog.h b/src/EditProfileDialog.h
index dc937700d..133e30752 100644
--- a/src/EditProfileDialog.h
+++ b/src/EditProfileDialog.h
@@ -25,12 +25,14 @@
 #include <QtCore/QPair>
 #include <QtCore/QHash>
 #include <QtCore/QSet>
+#include <QtCore/QPointer>
 
 // KDE
 #include <KDialog>
 
 class QAbstractButton;
 class QTextCodec;
+class QTimeLine;
 
 namespace Ui
 {
@@ -121,6 +123,8 @@ private slots:
     void fontSelected(const QFont&);
     //void previewFont(const QFont&);
 
+    void colorSchemeAnimationUpdate();
+
     // scrolling page
     void noScrollBack();
     void fixedScrollBack();
@@ -204,6 +208,8 @@ private:
  */
 class ColorSchemeViewDelegate : public QAbstractItemDelegate
 {
+Q_OBJECT
+
 public:
     ColorSchemeViewDelegate(QObject* parent = 0);
 
@@ -213,6 +219,19 @@ public:
     virtual QSize sizeHint( const QStyleOptionViewItem& option,
                        const QModelIndex& index) const;
 
+    /** 
+     * Sets the timeline used to control the entry animation
+     * for this delegate.
+     *
+     * During a call to paint(), the value of the timeLine is used to
+     * determine how to render the item ( with 0 being the beginning 
+     * of the animation and 1.0 being the end )
+     */
+    void setEntryTimeLine( QTimeLine* timeLine );
+
+private:
+    QPointer<QTimeLine> _entryTimeLine;
+
    // virtual QWidget* createEditor(QWidget* parent, const QStyleOptionViewItem& option, 
    //                               const QModelIndex& index) const;
    // virtual bool editorEvent(QEvent* event,QAbstractItemModel* model,