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() ) );

5 files changed, 11 insertions, 6 deletions

diff --git a/ChangeLog b/ChangeLog
index 7c26832..de27eb5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,46 +1,47 @@
 2004-??-??	The Opie Team <opie@handhelds.org>
 
+	* Fixed Drawpad initialization (Bug #1314) (mickeyl)
 	* Added four themes courtesy Robert Griebl (http://www.softforge.de/zstyle)
 	* Added Conversion tool for pim-data (eilers)
 	* Modifcation of the PIM API for providing generic use of OPimRecords. (eilers)
 
 2004-25-04	The Opie Team <opie@handhelds.org>
 
 	* Released as Version 1.1.3 (devel)
 	* Introduced first implementation of SQL-Support using SQLite (eilers)
 	* Added a new Gutenberg Project reader app - opie-gutenbrowser (ljp)
 	* Added a real system graffiti character set (brad)
 	* Added Generic Keyconfig Widget (zecke)
 	* Improved Screenshotapplet and Drawpad integration. You can now open a screenshot in drawpad and take notes (zecke)
 	* Added new Bible reader app - opie-dagger (drw)
 	* Added a new Image Viewer. Work is ongoing (zecke,alwin)
 	* Added namespace usage in libopie2 and everywhere (zecke,alwin)
 	* Enabled the possibility to pass command line arguments to applications (mickeyl)
 	* Added an about applet showing some credits and information about Opie (mickeyl)
 	* Added benchmarking functionality to sysinfo (mickeyl)
 	* Added applet and configuration application for switching hardware keyboard layouts (alwin)
 	* Ported applications from libopie1 to libopie2* (drw,ar,alwin)
 	* Imported fullscreen and font improvements from the Qkonsole fork to embeddedkonsole (waspe)
 	* Clean-up of package information in control files (drw)
 	* Repaired mediummount which was broken since integrating the quicklauncher (alwin)
 	* Improved big-screen support (zecke,ar)
 	* Improved multikeyboard support, added keyboard layout switching applet (mouse)
 	* Added a new mail client based on libetpan (harlekin,alwin,jgf)
 	* Added new package manager - opie-packagemanager (drw)
 	* Improved light-n-power for C7x0 (mickeyl)
 	* Added automatic rotation support for C7x0 (treke)
 	* Split libopie1 up into a set of smaller - functionally grouped - libraries (mickeyl)
 	* Added scanning the wireless network neighbourhood to networksettings (mickeyl)
 
 2003-11-29	The Opie Team <opie@handhelds.org>
 
 	* Released as Version 1.0.3
 	* Improved i18n (various contributors)
 	* Reduced application startup time by integrating the TT quicklauncher (zecke,harlekin)
 	* Made the Documents Tab optional (mickeyl)
 	* Integrated basic support for HP iPAQ 54xx and the Jornada 5xx (chicken)
 
 2003-08-04	The Opie Team <opie@handhelds.org>
 
 	* Released as Version 1.0.0
 	* Including a PPP module for easy dial up (tille,harlekin,zecke)
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
@@ -4,97 +4,96 @@
  *                                                                         *
  *   (C) 2002 by S. Prud'homme <prudhomme@laposte.net>                     *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "drawpad.h"
 
 #include "drawpadcanvas.h"
 #include "ellipsetool.h"
 #include "erasetool.h"
 #include "exportdialog.h"
 #include "filledellipsetool.h"
 #include "filledrectangletool.h"
 #include "filltool.h"
 #include "importdialog.h"
 #include "linetool.h"
 #include "newpagedialog.h"
 #include "page.h"
 #include "pageinformationdialog.h"
 #include "pointtool.h"
 #include "rectangletool.h"
 #include "texttool.h"
 #include "thumbnailview.h"
 
 #include <opie2/qcolordialog.h>
 #include <opie2/ocolorpopupmenu.h>
 
 #include <qpe/applnk.h>
 #include <qpe/config.h>
 #include <qtoolbar.h>
 #include <qpe/resource.h>
 #include <qpe/qpeapplication.h>
 
 #include <qmenubar.h>
 #include <qaction.h>
 #include <qfile.h>
 #include <qmessagebox.h>
 #include <qspinbox.h>
 #include <qtoolbutton.h>
 #include <qtooltip.h>
 #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)
 {
     // init members
     connect( qApp, SIGNAL(appMessage(const QCString&, const QByteArray&)),
              this, SLOT(slotAppMessage(const QCString&, const QByteArray&)) );
 
     m_pDrawPadCanvas = new DrawPadCanvas(this, this);
 
     connect(m_pDrawPadCanvas, SIGNAL(pagesChanged()), this, SLOT(updateView()));
 
     setCentralWidget(m_pDrawPadCanvas);
 
     // init menu
 
     setToolBarsMovable(false);
 
     QToolBar* menuToolBar = new QToolBar(this);
     QMenuBar* menuBar = new QMenuBar(menuToolBar);
 
     QPopupMenu* toolsPopupMenu = new QPopupMenu(menuBar);
 
     QAction* deleteAllAction = new QAction(tr("Delete All"), QString::null, 0, this);
     connect(deleteAllAction, SIGNAL(activated()), this, SLOT(deleteAll()));
     deleteAllAction->addTo(toolsPopupMenu);
 
     toolsPopupMenu->insertSeparator();
 
     QAction* importPageAction = new QAction(tr("Import"), tr("Import..."), 0, this);
     connect(importPageAction, SIGNAL(activated()), this, SLOT(importPage()));
     importPageAction->addTo(toolsPopupMenu);
 
     QAction* exportPageAction = new QAction(tr("Export"), tr("Export..."), 0, this);
     connect(exportPageAction, SIGNAL(activated()), this, SLOT(exportPage()));
     exportPageAction->addTo(toolsPopupMenu);
 
     toolsPopupMenu->insertSeparator();
 
     QAction* thumbnailViewAction = new QAction(tr("Thumbnail View"), tr("Thumbnail View..."), 0, this);
     connect(thumbnailViewAction, SIGNAL(activated()), this, SLOT(thumbnailView()));
     thumbnailViewAction->addTo(toolsPopupMenu);
 
     QAction* pageInformationAction = new QAction(tr("Page Information"), tr("Page Information..."), 0, this);
     connect(pageInformationAction, SIGNAL(activated()), this, SLOT(pageInformation()));
     pageInformationAction->addTo(toolsPopupMenu);
 
     toolsPopupMenu->insertSeparator();
 
@@ -236,97 +235,100 @@ DrawPad::DrawPad(QWidget* parent, const char* name,  WFlags /*fl*/ )
 
     m_pTool = 0;
     setRectangleTool();
     setEllipseTool();
     setPointTool();
 
     emptyToolBar = new QToolBar(this);
     emptyToolBar->setHorizontalStretchable(true);
     emptyToolBar->addSeparator();
 
     // init draw parameters toolbar
 
     QToolBar* drawParametersToolBar = new QToolBar(this);
 
     m_pPenWidthSpinBox = new QSpinBox(1, 9, 1, drawParametersToolBar);
     connect(m_pPenWidthSpinBox, SIGNAL(valueChanged(int)), this, SLOT(changePenWidth(int)));
 
     QToolTip::add(m_pPenWidthSpinBox, tr("Pen Width"));
     m_pPenWidthSpinBox->setValue(1);
     m_pPenWidthSpinBox->setFocusPolicy(QWidget::NoFocus);
     QWhatsThis::add( m_pPenWidthSpinBox, tr( "Click here to select the width of the drawing pen." ) );
 
     m_pPenColorToolButton = new QToolButton(drawParametersToolBar);
     m_pPenColorToolButton->setPixmap(Resource::loadPixmap("drawpad/pencolor"));
     QWhatsThis::add( m_pPenColorToolButton, tr( "Click here to select the color used when drawing." ) );
 
     Opie::OColorPopupMenu* penColorPopupMenu = new Opie::OColorPopupMenu(Qt::black, m_pPenColorToolButton);
     connect(penColorPopupMenu, SIGNAL(colorSelected(const QColor&)), this, SLOT(changePenColor(const QColor&)));
 
     QToolTip::add(m_pPenColorToolButton, tr("Pen Color"));
     m_pPenColorToolButton->setPopup(penColorPopupMenu);
     m_pPenColorToolButton->setPopupDelay(0);
 
     changePenColor(Qt::black);
 
     m_pBrushColorToolButton = new QToolButton(drawParametersToolBar);
     m_pBrushColorToolButton->setPixmap(Resource::loadPixmap("drawpad/brushcolor"));
     QWhatsThis::add( m_pBrushColorToolButton, tr( "Click here to select the color used when filling in areas." ) );
 
     Opie::OColorPopupMenu* brushColorPopupMenu = new Opie::OColorPopupMenu(Qt::white, m_pBrushColorToolButton);
     connect(brushColorPopupMenu, SIGNAL(colorSelected(const QColor&)), this, SLOT(changeBrushColor(const QColor&)));
 
     QToolTip::add(m_pBrushColorToolButton, tr("Fill Color"));
     m_pBrushColorToolButton->setPopup(brushColorPopupMenu);
     m_pBrushColorToolButton->setPopupDelay(0);
 
     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() ) );
 }
 
 
 void DrawPad::finishStartup()
 {
     // init pages
 
     QFile file(Global::applicationFileName("drawpad", "drawpad.xml"));
 
     if (file.open(IO_ReadOnly)) {
         m_pDrawPadCanvas->load(&file);
         file.close();
     } else {
         m_pDrawPadCanvas->initialPage();
     }
 
     loadConfig();
 
 }
 
 DrawPad::~DrawPad()
 {
     saveConfig();
 
     QFile file(Global::applicationFileName("drawpad", "drawpad.xml"));
 
     if (file.open(IO_WriteOnly)) {
         m_pDrawPadCanvas->save(&file);
         file.close();
     }
 }
 
 bool DrawPad::antiAliasing()
 {
     return (m_pAntiAliasingAction->isOn());
 }
 
 void DrawPad::newPage()
 {
     QRect rect = m_pDrawPadCanvas->contentsRect();
 
     NewPageDialog newPageDialog(rect.width(), rect.height(), m_pen.color(), m_brush.color(), this);
 
     if (newPageDialog.exec() == QDialog::Accepted) {
         m_pDrawPadCanvas->newPage(newPageDialog.selectedTitle(), newPageDialog.selectedWidth(),
                                   newPageDialog.selectedHeight(), newPageDialog.selectedColor());
     }
 }
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
@@ -1,94 +1,95 @@
 /***************************************************************************
  *                                                                         *
  *   DrawPad - a drawing program for Opie Environment                      *
  *                                                                         *
  *   (C) 2002 by S. Prud'homme <prudhomme@laposte.net>                     *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef DRAWPAD_H
 #define DRAWPAD_H
 
 #include <qmainwindow.h>
 #include <qpen.h>
 
 class DrawPadCanvas;
 class Tool;
 
 class QAction;
 class QColor;
 class QSpinBox;
 class QToolButton;
 class QWidgetStack;
 
 class DrawPad : public QMainWindow
 {
     Q_OBJECT
 
 public:
     DrawPad(QWidget* parent = 0, const char* name = 0, WFlags fl = 0);
     ~DrawPad();
 
     static QString appName() { return QString::fromLatin1("drawpad"); }
 
     Tool* tool() { return m_pTool; }
     QPen pen() { return m_pen; }
     QBrush brush() { return m_brush; }
 
     bool antiAliasing();
-    void finishStartup();
 
 private slots:
+    void finishStartup();
+
     void newPage();
     void clearPage();
     void deletePage();
 
     void slotAppMessage( const QCString&, const QByteArray& );
 
     void setPointTool();
     void setLineTool();
     void setRectangleTool();
     void setFilledRectangleTool();
     void setEllipseTool();
     void setFilledEllipseTool();
     void setTextTool();
     void setFillTool();
     void setEraseTool();
 
     void changePenWidth(int value);
     void changePenColor(const QColor& color);
     void changeBrushColor(const QColor& color);
 
     void updateView();
 
     void deleteAll();
     void importPage();
     void exportPage();
     void thumbnailView();
     void pageInformation();
 
 private:
     void loadConfig();
     void saveConfig();
 
     DrawPadCanvas* m_pDrawPadCanvas;
 
     Tool* m_pTool;
     QPen m_pen;
     QBrush m_brush;
 
     QAction* m_pAntiAliasingAction;
 
     QAction* m_pUndoAction;
     QAction* m_pRedoAction;
 
     QAction* m_pFirstPageAction;
     QAction* m_pPreviousPageAction;
     QAction* m_pNextPageAction;
     QAction* m_pLastPageAction;
 
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
@@ -471,62 +471,64 @@ void DrawPadCanvas::goFirstPage()
 }
 
 void DrawPadCanvas::goPreviousPage()
 {
     m_pages.prev();
 
     resizeContents(m_pages.current()->pixmap()->width(), m_pages.current()->pixmap()->height());
     viewport()->update();
 
     emit pagesChanged();
 }
 
 void DrawPadCanvas::goNextPage()
 {
     m_pages.next();
     resizeContents(m_pages.current()->pixmap()->width(), m_pages.current()->pixmap()->height());
     viewport()->update();
 
     emit pagesChanged();
 }
 
 void DrawPadCanvas::goLastPage()
 {
     m_pages.last();
 
     resizeContents(m_pages.current()->pixmap()->width(), m_pages.current()->pixmap()->height());
     viewport()->update();
 
     emit pagesChanged();
 }
 
 void DrawPadCanvas::contentsMousePressEvent(QMouseEvent* e)
 {
     m_pDrawPad->tool()->mousePressEvent(e);
 }
 
 void DrawPadCanvas::contentsMouseReleaseEvent(QMouseEvent* e)
 {
     m_pDrawPad->tool()->mouseReleaseEvent(e);
 }
 
 void DrawPadCanvas::contentsMouseMoveEvent(QMouseEvent* e)
 {
     m_pDrawPad->tool()->mouseMoveEvent(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());
     }
 
     if (drawRect.bottom() < clipRect.bottom()) {
         p->fillRect(cx, drawRect.bottom() + 1, cw, ch - drawRect.height(), 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
@@ -1,20 +1,19 @@
 /***************************************************************************
  *                                                                         *
  *   DrawPad - a drawing program for Opie Environment                      *
  *                                                                         *
  *   (C) 2002 by S. Prud'homme <prudhomme@laposte.net>                     *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "drawpad.h"
 
 #include <opie2/oapplicationfactory.h>
 
 using namespace Opie::Core;
-using namespace Opie::Core;
 OPIE_EXPORT_APP( OApplicationFactory<DrawPad> )