Better scroll to fit implementation.

glabels/MainWindow.cpp

@@ -572,17 +572,18 @@ namespace glabels
 	{
 		QWidget* page = new QWidget;
 
-		mView = new View();
+		mViewScrollArea = new QScrollArea();
+		mViewScrollArea->setMinimumSize( 640, 450 );
+		mViewScrollArea->setWidgetResizable( true );
+
+		mView = new View( mViewScrollArea );
 		mObjectEditor = new ObjectEditor();
 
-		QScrollArea* scrollArea = new QScrollArea();
-		scrollArea->setMinimumSize( 640, 450 );
-		scrollArea->setWidgetResizable( true );
-		scrollArea->setWidget( mView );
+		mViewScrollArea->setWidget( mView );
 
 		QVBoxLayout* editorVLayout = new QVBoxLayout;
 		editorVLayout->addWidget( editorToolBar );
-		editorVLayout->addWidget( scrollArea );
+		editorVLayout->addWidget( mViewScrollArea );
 
 		QHBoxLayout* editorHLayout = new QHBoxLayout;
 		editorHLayout->addLayout( editorVLayout );

glabels/MainWindow.h

@@ -29,6 +29,7 @@ class QMenuBar;
 class QMenu;
 class QToolBar;
 class QLabel;
+class QScrollArea;
 
 
 namespace glabels
@@ -189,6 +190,7 @@ namespace glabels
 
 		QTabWidget*   mNotebook;
 		LabelModel*   mModel;
+		QScrollArea*  mViewScrollArea;
 		View*         mView;
 		ObjectEditor* mObjectEditor;
 		PrintView*    mPrintView;

glabels/PageRenderer.cpp

@@ -175,7 +175,6 @@ namespace glabels
 
 		printCropMarks( painter );
 
-		qDebug() << "ipage = " << iPage << ", iStart = " << iStart << ", iEnd = " << iEnd;
 		for ( int i = iStart; i < iEnd; i++ )
 		{
 			painter->save();

glabels/View.cpp

@@ -74,7 +74,8 @@ namespace
 ///
 /// Constructor
 ///
-glabels::View::View( QWidget *parent ) : QWidget(parent)
+glabels::View::View( QScrollArea* scrollArea, QWidget* parent )
+	: QWidget(parent), mScrollArea(scrollArea)
 {
 	mState = IdleState;
 
@@ -232,9 +233,8 @@ glabels::View::zoomToFit()
 	using std::min;
 	using std::max;
 
-	// Assumes parent widget (QScrollArea) exists
-	double wPixels = parentWidget()->width();
-	double hPixels = parentWidget()->height();
+	double wPixels = mScrollArea->maximumViewportSize().width();
+	double hPixels = mScrollArea->maximumViewportSize().height();
 	
 	double x_scale = ( wPixels - ZOOM_TO_FIT_PAD ) / mModel->w();
 	double y_scale = ( hPixels - ZOOM_TO_FIT_PAD ) / mModel->h();
@@ -280,7 +280,7 @@ glabels::View::setZoomReal( double zoom, bool zoomToFitFlag )
 	/* Actual scale depends on DPI of display (assume DpiX == DpiY). */
 	mScale = zoom * physicalDpiX() / PTS_PER_INCH;
 
-	setMinimumSize( mScale*mModel->w(), mScale*mModel->h() );
+	setMinimumSize( mScale*mModel->w() + ZOOM_TO_FIT_PAD, mScale*mModel->h() + ZOOM_TO_FIT_PAD );
 
 	/* Adjust origin to center label in widget. */
 	mX0 = (width()/mScale - mModel->w()) / 2;

glabels/View.h

@@ -22,6 +22,7 @@
 #define glabels_View_h
 
 #include <QWidget>
+#include <QScrollArea>
 #include <QPainter>
 
 #include "LabelRegion.h"
@@ -46,7 +47,7 @@ namespace glabels
 		// Lifecycle
 		/////////////////////////////////////
 	public:
-		View( QWidget *parent = 0 );
+		View( QScrollArea* scrollArea, QWidget* parent = 0 );
 
 
 		/////////////////////////////////////
@@ -142,8 +143,8 @@ namespace glabels
 		// Private slots
 		/////////////////////////////////////
 	private:
-		void onLabelChanged();
-		void onLabelSizeChanged();
+		void onModelChanged();
+		void onModelSizeChanged();
 
 
 		/////////////////////////////////////
@@ -167,6 +168,8 @@ namespace glabels
 			Barcode
 		};
 
+		QScrollArea*        mScrollArea;
+
 		double              mZoom;
 		bool                mZoomToFitFlag;
 		double              mScale;