Fix the painting routines for the desktop/panel. Make sure we only paint the *requested* rectangle, and not the whole thing on every request.

2 files changed, 8 insertions, 7 deletions

diff --git a/src-qt5/core/lumina-desktop/LDesktopBackground.cpp b/src-qt5/core/lumina-desktop/LDesktopBackground.cpp
index 3d33db71..97249384 100644
--- a/src-qt5/core/lumina-desktop/LDesktopBackground.cpp
+++ b/src-qt5/core/lumina-desktop/LDesktopBackground.cpp
@@ -7,12 +7,13 @@
 #include "LDesktopBackground.h"
 
 #include <QPainter>
+#include <QPaintEvent>
 
-void LDesktopBackground::paintEvent(QPaintEvent *) {
+void LDesktopBackground::paintEvent(QPaintEvent *ev) {
     if (bgPixmap != NULL) {
         QPainter painter(this);
         painter.setBrush(*bgPixmap);
-        painter.drawRect(0, 0, width(), height());
+        painter.drawRect(ev->rect());
     }
 }
 
diff --git a/src-qt5/core/lumina-desktop/LPanel.cpp b/src-qt5/core/lumina-desktop/LPanel.cpp
index b0abf498..6e07f624 100644
--- a/src-qt5/core/lumina-desktop/LPanel.cpp
+++ b/src-qt5/core/lumina-desktop/LPanel.cpp
@@ -324,12 +324,12 @@ void LPanel::paintEvent(QPaintEvent *event){
     QPainter *painter = new QPainter(this);
     //qDebug() << "Paint Panel:" << PPREFIX;
     //Make sure the base background of the event rectangle is the associated rectangle from the BGWindow
-    QRect rec = this->geometry(); //start with the global geometry of the panel
+    QRect rec = event->rect();//this->geometry(); //start with the global geometry of the panel
     //Need to translate that rectangle to the background image coordinates
-    //qDebug() << " - Rec:" << rec << hidden << this->geometry();
-    rec.moveTo( rec.x()-LSession::handle()->screenGeom(screennum).x(), rec.y()-LSession::handle()->screenGeom(screennum).y() );
-    //qDebug() << " - Adjusted Global Rec:" << rec;
-    painter->drawPixmap(QRect(0,0,this->width(), this->height()), bgWindow->grab(rec) );
+    qDebug() << " - Rec:" << rec << hidden << this->geometry() << bgWindow->geometry();
+    rec.moveTo( bgWindow->mapFromGlobal( this->mapToGlobal(rec.topLeft()) ) ); //(rec.x()-LSession::handle()->screenGeom(screennum).x(), rec.y()-LSession::handle()->screenGeom(screennum).y() );
+    qDebug() << " - Adjusted Window Rec:" << rec;
+    painter->drawPixmap(event->rect(), bgWindow->grab(rec) );
   }
   QWidget::paintEvent(event); //now pass the event along to the normal painting event
 }