BUGFIX for 1314: Fix page initialization on first start of drawpad.

Problem was caused by a race condition. Developers: If you have todo
initializations which depend on the widget layout being finished,
_don't_ do this in the widget constructor but in a callback from the mainloop,
i.e. via QTimer::singleShot( 10, this, SLOT( myInitialization() ) );

4 files changed, 10 insertions, 6 deletions

diff --git a/noncore/graphics/drawpad/drawpad.cpp b/noncore/graphics/drawpad/drawpad.cpp
index d9d0ce0..c0f42d9 100644
--- a/noncore/graphics/drawpad/drawpad.cpp
+++ b/noncore/graphics/drawpad/drawpad.cpp
@@ -49,7 +49,6 @@
 #include <qwhatsthis.h>
 
 using namespace Opie::Ui;
-using namespace Opie::Ui;
 DrawPad::DrawPad(QWidget* parent, const char* name,  WFlags /*fl*/ )
     : QMainWindow(parent, name, WStyle_ContextHelp)
 {
@@ -281,7 +280,10 @@ DrawPad::DrawPad(QWidget* parent, const char* name,  WFlags /*fl*/ )
 
     changeBrushColor(Qt::white);
 
-    finishStartup();
+    // delay the rest of the initialization and do it from within the mainloop
+    // if we don't do this, the widget layout may not be constructed upon
+    // and we will end up with a wrong QScrollview page size (Mickeyl)
+    QTimer::singleShot( 100, this, SLOT( finishStartup() ) );
 }
 
 
diff --git a/noncore/graphics/drawpad/drawpad.h b/noncore/graphics/drawpad/drawpad.h
index ba9e47d..63d3057 100644
--- a/noncore/graphics/drawpad/drawpad.h
+++ b/noncore/graphics/drawpad/drawpad.h
@@ -41,9 +41,10 @@ public:
     QBrush brush() { return m_brush; }
 
     bool antiAliasing();
-    void finishStartup();
 
 private slots:
+    void finishStartup();
+
     void newPage();
     void clearPage();
     void deletePage();
diff --git a/noncore/graphics/drawpad/drawpadcanvas.cpp b/noncore/graphics/drawpad/drawpadcanvas.cpp
index 423ef26..5d0c6e4 100644
--- a/noncore/graphics/drawpad/drawpadcanvas.cpp
+++ b/noncore/graphics/drawpad/drawpadcanvas.cpp
@@ -516,11 +516,13 @@ void DrawPadCanvas::contentsMouseMoveEvent(QMouseEvent* e)
 
 void DrawPadCanvas::drawContents(QPainter* p, int cx, int cy, int cw, int ch)
 {
+    Page* currentPage = m_pages.current();
+    if ( !currentPage ) return; // no page yet --> initialization not finished (Mickeyl)
     QRect clipRect(cx, cy, cw, ch);
-    QRect pixmapRect(0, 0, m_pages.current()->pixmap()->width(), m_pages.current()->pixmap()->height());
+    QRect pixmapRect(0, 0, currentPage->pixmap()->width(), m_pages.current()->pixmap()->height());
     QRect drawRect = pixmapRect.intersect(clipRect);
 
-    p->drawPixmap(drawRect.topLeft(), *(m_pages.current()->pixmap()), drawRect);
+    p->drawPixmap(drawRect.topLeft(), *(currentPage->pixmap()), drawRect);
 
     if (drawRect.right() < clipRect.right()) {
         p->fillRect(drawRect.right() + 1, cy, cw - drawRect.width(), ch, colorGroup().dark());
diff --git a/noncore/graphics/drawpad/main.cpp b/noncore/graphics/drawpad/main.cpp
index e48bb2e..f468022 100644
--- a/noncore/graphics/drawpad/main.cpp
+++ b/noncore/graphics/drawpad/main.cpp
@@ -16,5 +16,4 @@
 #include <opie2/oapplicationfactory.h>
 
 using namespace Opie::Core;
-using namespace Opie::Core;
 OPIE_EXPORT_APP( OApplicationFactory<DrawPad> )