From 8fbf461b279c0b96fdf5b764ef04376b5f7da7ec Mon Sep 17 00:00:00 2001
From: deva <deva>
Date: Wed, 23 Feb 2011 07:23:11 +0000
Subject: Fade between widgets introduced in Collapser.

---
 client/collapser.cc | 72 ++++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 55 insertions(+), 17 deletions(-)

(limited to 'client/collapser.cc')

diff --git a/client/collapser.cc b/client/collapser.cc
index a00dcff..6ae9d21 100644
--- a/client/collapser.cc
+++ b/client/collapser.cc
@@ -31,7 +31,7 @@
 
 #include "debug.h"
 
-#define ANIM_TIME 250
+#define ANIM_TIME 2000
 #define ANIM_INTERVAL 20
 
 Collapser::Collapser(QWidget *collapsed, QWidget *expanded, bool setcollapsed,
@@ -58,48 +58,57 @@ Collapser::Collapser(QWidget *collapsed, QWidget *expanded, bool setcollapsed,
 
 void Collapser::setWidgets(QWidget *collapsed, QWidget *expanded)
 {
+  DEBUG(collapser, "\n");
   setCollapsedWidget(collapsed);
   setExpandedWidget(expanded);
 }
 
 void Collapser::setCollapsedWidget(QWidget *collapsed)
 {
+  DEBUG(collapser, "\n");
   this->collapsed = collapsed;
-
+  /*
   if(isCollapsed() == true && collapsed) {
     layout()->addWidget(collapsed);
     collapsed->setVisible(true);
   }
+  */
 }
 
 void Collapser::setExpandedWidget(QWidget *expanded)
 {
+  DEBUG(collapser, "\n");
   this->expanded = expanded;
-
+  /*
   if(isCollapsed() == false && expanded) {
     layout()->addWidget(expanded);
     expanded->setVisible(true);
   }
+  */
 }
 
 QWidget *Collapser::collapsedWidget()
 {
+  DEBUG(collapser, "\n");
   return collapsed;
 }
 
 QWidget *Collapser::expandedWidget()
 {
+  DEBUG(collapser, "\n");
   return expanded;
 }
 
 
 bool Collapser::isCollapsed()
 {
+  DEBUG(collapser, "\n");
   return is_collapsed;
 }
 
 void Collapser::setCollapsed(bool setcollapsed)
 {
+  DEBUG(collapser, "\n");
   if(this->is_collapsed == setcollapsed) return;
 
   if(setcollapsed) collapse();
@@ -108,6 +117,7 @@ void Collapser::setCollapsed(bool setcollapsed)
 
 void Collapser::collapse()
 {
+  DEBUG(collapser, "\n");
   emit collapsing();
 
   t_anim.start();
@@ -119,14 +129,17 @@ void Collapser::collapse()
     expanded->setVisible(false);
     layout()->removeWidget(expanded);
   }
+  if(expanded) placeholder.grab_from(expanded);
 
   layout()->addWidget(&placeholder);
   placeholder.setVisible(true);
-  if(expanded) placeholder.grab(expanded);
+
+  if(collapsed) placeholder.grab_to(collapsed);
 }
 
 void Collapser::expand()
 {
+  DEBUG(collapser, "\n");
   emit expanding();
 
   t_anim.start();
@@ -134,16 +147,16 @@ void Collapser::expand()
   // show expanded
   if(collapsed) {
     collapsed->setVisible(false);
-    //    qApp->processEvents(); // Make sure it is actually invisble before removing it form the layout.
+    //qApp->processEvents(); // Make sure it is actually invisble before removing it form the layout.
     layout()->removeWidget(collapsed);
+
+    placeholder.grab_from(collapsed);
   }
-  if(expanded) {
-    layout()->addWidget(&placeholder);
-    placeholder.setVisible(true);
-    placeholder.grab(expanded);
-    //    layout()->addWidget(expanded);
-    //    expanded->setVisible(true);
-  }
+
+  layout()->addWidget(&placeholder);
+  placeholder.setVisible(true);
+
+  if(expanded) placeholder.grab_to(expanded);
   
   is_collapsed = false;
   timer->start();
@@ -151,12 +164,14 @@ void Collapser::expand()
 
 void Collapser::toggleCollapse()
 {
+  DEBUG(collapser, "\n");
   if(!is_collapsed) collapse();
   else expand();
 }
 
 void Collapser::anim()
 {
+  DEBUG(collapser, "\n");
   int c_height = 16;
   int e_height = 16;
   if(collapsed) {
@@ -175,6 +190,8 @@ void Collapser::anim()
   if(x < 1) {
     y = x * x * x;
 
+    placeholder.setWeight(x);
+
     int height;
     if(!is_collapsed) {
       height = (int)((1 - y) * c_height + y * e_height);
@@ -195,7 +212,7 @@ void Collapser::anim()
 
       if(collapsed) {
         layout()->addWidget(collapsed);
-        collapsed->setFixedHeight(c_height);
+        // collapsed->setFixedHeight(c_height);
         collapsed->setVisible(true);
       }
 
@@ -227,16 +244,37 @@ void Collapser::anim()
 void Collapser::Placeholder::paintEvent(QPaintEvent *)
 {
   QPainter p(this);
-  p.drawPixmap(rect(), pixmap, pixmap.rect());
+  p.setOpacity(1 - weight);
+  p.drawPixmap(rect(), pixmap_from, pixmap_from.rect());
+  p.setOpacity(weight);
+  p.drawPixmap(rect(), pixmap_to, pixmap_to.rect());
+}
+
+void Collapser::Placeholder::grab_from(QWidget *w)
+{
+  weight = 0; // Reset
+
+  if(!w) return;
+  //  w->setFixedWidth(contentsRect().width());
+  QSize sz = w->minimumSizeHint();
+  //  w->setFixedHeight(sz.height());
+  w->resize(width(), sz.height());
+  pixmap_from = QPixmap::grabWidget(w, 0, 0);
 }
 
-void Collapser::Placeholder::grab(QWidget *w)
+void Collapser::Placeholder::grab_to(QWidget *w)
 {
+  weight = 0; // Reset
+
   if(!w) return;
   //  w->setFixedWidth(contentsRect().width());
   QSize sz = w->minimumSizeHint();
   //  w->setFixedHeight(sz.height());
-  DEBUG(collapser, "WIDTH: %d\n", width());
   w->resize(width(), sz.height());
-  pixmap = QPixmap::grabWidget(w, 0, 0);
+  pixmap_to = QPixmap::grabWidget(w, 0, 0);
+}
+
+void Collapser::Placeholder::setWeight(double w)
+{
+  weight = w * w * w;
 }
-- 
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