From 7b117e354cbc11d7dcd3a4a33177cf21e9ed22ef Mon Sep 17 00:00:00 2001
From: Matthias Hoelzer-Kluepfel <hoelzer@kde.org>
Date: Mon, 15 May 2000 14:53:59 +0000
Subject: [PATCH] Zooming fixes. Has to be redone sometime soon.

svn path=/trunk/kdegraphics/kdvi/; revision=49582
---
 dviwin.cpp         | 17 +++++++++++------
 dviwin.h           | 10 ++++++++--
 kdvi_multipage.cpp | 17 +++++++++--------
 3 files changed, 28 insertions(+), 16 deletions(-)

diff --git a/dviwin.cpp b/dviwin.cpp
index 1520748e6..b6513d154 100644
--- a/dviwin.cpp
+++ b/dviwin.cpp
@@ -98,7 +98,7 @@ extern  void qt_processEvents(void)
 
 //------ now comes the dviWindow class implementation ----------
 
-dviWindow::dviWindow( int bdpi, int zoom, const char *mfm, const char *ppr, int mkpk, QWidget *parent, const char *name ) 
+dviWindow::dviWindow( int bdpi, double zoom, const char *mfm, const char *ppr, int mkpk, QWidget *parent, const char *name ) 
   : QWidget( parent, name )
 {
   setBackgroundMode(NoBackground);
@@ -126,8 +126,9 @@ dviWindow::dviWindow( int bdpi, int zoom, const char *mfm, const char *ppr, int
 	pixmap = NULL;
 
 	double xres = ((double)(DisplayWidth(DISP,(int)DefaultScreen(DISP)) *25.4)/DisplayWidthMM(DISP,(int)DefaultScreen(DISP)) ); //@@@
-	double s    = (basedpi * 100)/(xres*(double)zoom);
+	double s    = basedpi/(xres*zoom);
 	mane.shrinkfactor = currwin.shrinkfactor = s;
+	_zoom = zoom;
 
 	resize(0,0);
 }
@@ -381,6 +382,8 @@ void dviWindow::changePageSize()
   resize( page_w, page_h );
   currwin.win = mane.win = pixmap->handle();
   drawPage();
+
+  kdDebug() << "New Pixmap size = " << page_w << "x" << page_h << endl;
 }
 
 //------ setup the dvi interpreter (should do more here ?) ----------
@@ -418,14 +421,16 @@ int dviWindow::totalPages()
 }
 
 
-void dviWindow::setZoom(int zoom)
+void dviWindow::setZoom(double zoom)
 {
-  if ((zoom < 5) || (zoom > 500))
-    zoom = 100;
+  //  if ((zoom < 0.05) || (zoom > 5.0))
+  //    zoom = 1.0;
 
   double xres = ((double)(DisplayWidth(DISP,(int)DefaultScreen(DISP)) *25.4)/DisplayWidthMM(DISP,(int)DefaultScreen(DISP)) ); //@@@
-  double s    = (basedpi * 100)/(xres*(double)zoom);
+  double s    = basedpi/(xres*zoom);
   mane.shrinkfactor = currwin.shrinkfactor = s;
+  _zoom = zoom;
+
   init_page();
   reset_fonts();
   changePageSize();
diff --git a/dviwin.h b/dviwin.h
index 4ba20d39c..16d3bdf43 100644
--- a/dviwin.h
+++ b/dviwin.h
@@ -19,7 +19,7 @@ class dviWindow : public QWidget
 	Q_OBJECT
 
 public:
-	dviWindow( int basedpi, int zoom, const char *mfmode, const char *paper, int makepk,
+	dviWindow( int basedpi, double zoom, const char *mfmode, const char *paper, int makepk,
 	QWidget *parent=0, const char *name=0 );
 	~dviWindow();
 
@@ -45,7 +45,11 @@ public:
 public slots:
 	void		setFile(const char *fname);
 	void		gotoPage(int page);
-	void		setZoom(int zoom);
+	//	void		setZoom(int zoom);
+
+	void		setZoom(double zoom);
+	double          zoom() { return _zoom; };
+
 	void		drawPage();
 
 protected:
@@ -63,6 +67,8 @@ private:
 	QString		FontPath;
 	QString		paper_type;
 	int		ChangesPossible;
+	double          _zoom;
+
 };
 
 #endif
diff --git a/kdvi_multipage.cpp b/kdvi_multipage.cpp
index e7c7dafe5..b6ab86f89 100644
--- a/kdvi_multipage.cpp
+++ b/kdvi_multipage.cpp
@@ -15,7 +15,6 @@ extern "C"
 {
   void *init_libkdvi()
   {
-    kdDebug() << "DVI Widget created!" << endl;
     return new KDVIMultiPageFactory;
   }
 };
@@ -59,7 +58,7 @@ KDVIMultiPage::KDVIMultiPage(QWidget *parent, const char *name)
 {
   setInstance(KDVIMultiPageFactory::instance()); 
 
-  window = new dviWindow(300, 100, "cx", "a4", 1, scrollView());
+  window = new dviWindow(300, 1.0, "cx", "a4", 0, scrollView());
 
   scrollView()->addChild(window);
 }
@@ -76,6 +75,8 @@ bool KDVIMultiPage::openFile()
 
   emit numberOfPages(window->totalPages());
   scrollView()->resizeContents(window->width(), window->height());
+
+  return true;
 }
 
 
@@ -90,27 +91,27 @@ QStringList KDVIMultiPage::fileFormats()
 
 bool KDVIMultiPage::gotoPage(int page)
 {
-  kdDebug() << "New Page number: " << page << endl;
+  window->gotoPage(page);
   return true;
 }
 
 
 void KDVIMultiPage::setZoom(double zoom)
 {
-  kdDebug() << "New Zoom Factor: " << zoom << endl;
-
-  window->setZoom(zoom*100);
+  window->setZoom(zoom);
   scrollView()->resizeContents(window->width(), window->height());
 }
 
 
+extern unsigned int page_w, page_h; 
+
 double KDVIMultiPage::zoomForHeight(int height)
 {
-  return height/200.0;
+  return (window->zoom() * (double)height)/(double)page_h;
 }
 
 
 double KDVIMultiPage::zoomForWidth(int width)
 {
-  return width/300.0;
+  return (window->zoom() * (double)width)/(double)page_w;
 }