From c09daf3f0938f079a88e99c68f34c8011a1cedf6 Mon Sep 17 00:00:00 2001
From: Wilco Greven <greven@kde.org>
Date: Mon, 2 Sep 2002 19:47:18 +0000
Subject: [PATCH] Created a Canvas class. For now it's simply a QScrollView,
 but I will move some stuff from the part in there.

svn path=/trunk/kdegraphics/kpdf/; revision=175355
---
 kpdf/kpdf_canvas.cpp | 11 +++++++++++
 kpdf/kpdf_canvas.h   | 19 +++++++++++++++++++
 kpdf/kpdf_part.cpp   | 27 +++++++++++++--------------
 kpdf/kpdf_part.h     | 35 ++++++-----------------------------
 4 files changed, 49 insertions(+), 43 deletions(-)
 create mode 100644 kpdf/kpdf_canvas.cpp
 create mode 100644 kpdf/kpdf_canvas.h

diff --git a/kpdf/kpdf_canvas.cpp b/kpdf/kpdf_canvas.cpp
new file mode 100644
index 000000000..b4d466f9e
--- /dev/null
+++ b/kpdf/kpdf_canvas.cpp
@@ -0,0 +1,11 @@
+#include "kpdf_canvas.h"
+#include "kpdf_canvas.moc"
+
+using namespace KPDF;
+
+Canvas::Canvas(QWidget* parent, const char* name, WFlags f)
+  : QScrollView(parent, name, f)
+{
+}
+
+// vim:ts=2:sw=2:tw=78:et
diff --git a/kpdf/kpdf_canvas.h b/kpdf/kpdf_canvas.h
new file mode 100644
index 000000000..52cb6a196
--- /dev/null
+++ b/kpdf/kpdf_canvas.h
@@ -0,0 +1,19 @@
+#ifndef _KPDF_CANVAS_H_
+#define _KPDF_CANVAS_H_
+
+#include <qscrollview.h>
+
+namespace KPDF
+{
+  class Canvas : public QScrollView
+  {
+    Q_OBJECT
+
+  public:
+    Canvas(QWidget* parent = 0, const char* name = 0, WFlags f = 0);
+  };
+}
+
+#endif
+
+// vim:ts=2:sw=2:tw=78:et
diff --git a/kpdf/kpdf_part.cpp b/kpdf/kpdf_part.cpp
index 0713bef7b..f70aedf7d 100644
--- a/kpdf/kpdf_part.cpp
+++ b/kpdf/kpdf_part.cpp
@@ -3,8 +3,6 @@
 #include <math.h>
 
 #include <qfile.h>
-#include <qscrollview.h>
-#include <qtextstream.h>
 
 #include <kaction.h>
 #include <kdebug.h>
@@ -20,6 +18,7 @@
 #include "PDFDoc.h"
 #include "XOutputDev.h"
 
+#include "kpdf_canvas.h"
 #include "kpdf_pagewidget.h"
 
 typedef KParts::GenericFactory<KPDF::Part> KPDFPartFactory;
@@ -42,11 +41,11 @@ Part::Part(QWidget *parentWidget, const char *widgetName,
   // we need an instance
   setInstance(KPDFPartFactory::instance());
 
-  m_scrollView = new QScrollView(parentWidget, widgetName);
-  setWidget(m_scrollView);
+  m_canvas = new Canvas(parentWidget, widgetName);
+  setWidget(m_canvas);
 
-  m_pageWidget = new PageWidget(m_scrollView->viewport());
-  m_scrollView->addChild(m_pageWidget);
+  m_pageWidget = new PageWidget(m_canvas->viewport());
+  m_canvas->addChild(m_pageWidget);
 
   connect(m_pageWidget, SIGNAL(linkClicked(LinkAction*)), 
           SLOT(executeAction(LinkAction*)));
@@ -144,25 +143,25 @@ Part::displayPage(int pageNumber, float /*zoomFactor*/)
   {
     const double pageAR = pageWidth/pageHeight; // Aspect ratio
 
-    const int scrollViewWidth  = m_scrollView->contentsRect().width();
-    const int scrollViewHeight = m_scrollView->contentsRect().height();
-    const int scrollBarWidth   = m_scrollView->verticalScrollBar()->width();
+    const int canvasWidth    = m_canvas->contentsRect().width();
+    const int canvasHeight   = m_canvas->contentsRect().height();
+    const int scrollBarWidth = m_canvas->verticalScrollBar()->width();
 
     // Calculate the height so that the page fits the viewport width 
     // assuming that we need a vertical scrollbar.
-    float height = float(scrollViewWidth - scrollBarWidth) / pageAR;
+    float height = float(canvasWidth - scrollBarWidth) / pageAR;
 
     // If the vertical scrollbar wasn't needed after all, calculate the page
     // size so that the page fits the viewport width without the scrollbar.
-    if (ceil(height) <= scrollViewHeight)
+    if (ceil(height) <= canvasHeight)
     {
-      height = float(scrollViewWidth) / pageAR;
+      height = float(canvasWidth) / pageAR;
 
       // Handle the rare case that enlarging the page resulted in the need of 
       // a vertical scrollbar. We can fit the page to the viewport height in
       // this case.
-      if (ceil(height) > scrollViewHeight)
-        height = float(scrollViewHeight) * pageAR;
+      if (ceil(height) > canvasHeight)
+        height = float(canvasHeight) * pageAR;
     }
 
     m_zoomFactor = (height / pageHeight) / basePpp;
diff --git a/kpdf/kpdf_part.h b/kpdf/kpdf_part.h
index 42dc9e7f6..2316799aa 100644
--- a/kpdf/kpdf_part.h
+++ b/kpdf/kpdf_part.h
@@ -9,7 +9,6 @@
 
 class QPainter;
 class QPixmap;
-class QScrollView;
 class QWidget;
 
 class KAboutData;
@@ -22,31 +21,9 @@ class LinkDest;
 class PDFDoc;
 class XOutputDev;
 
-/*
-class QPixmapWidget : public QWidget
-{
-public:
-    QPixmapWidget( QPixmap* bg, QWidget* parent = 0, const char* name = 0 )
-        : QWidget( parent, name )
-	, m_pixmap( bg )
-    {
-        setFixedSize( bg->size() );
-    }
-
-protected:
-    void paintEvent( QPaintEvent* pe )
-    {
-	QPainter p( this );
-	p.drawPixmap( pe->rect().topLeft(), *m_pixmap, pe->rect() );
-    }
-
-private:
-    QPixmap* m_pixmap;
-};
-*/
-
 namespace KPDF
 {
+  class Canvas;
   class PageWidget;
 
   /**
@@ -101,11 +78,11 @@ namespace KPDF
     void executeAction(LinkAction*);
 
   private:
-    QScrollView* m_scrollView;
-    QPixmap      m_pagePixmap;
-    PageWidget*  m_pageWidget;
-    PDFDoc*      m_doc;
-    XOutputDev*  m_outputDev;
+    Canvas*     m_canvas;
+    QPixmap     m_pagePixmap;
+    PageWidget* m_pageWidget;
+    PDFDoc*     m_doc;
+    XOutputDev* m_outputDev;
 
     KToggleAction* m_fitWidth;