PanningPreviewInterface Class Reference

#include <panningPreviewInterface.h>

Inheritance diagram for PanningPreviewInterface:

[legend]Collaboration diagram for PanningPreviewInterface:

[legend]List of all members.

Public Slots
void	setSelection (QRect selection)
Signals
void	selectionChanged ()
Public Member Functions
	PanningPreviewInterface (QString imageFilename, QWidget *parent=0, const char *name=0)
	Creates layout.
virtual QSize	sizeHint () const
QRect	getSelection ()
QSize	paintingSize ()
Protected Member Functions
void	resizeEvent (QResizeEvent *)
Private Member Functions
void	generateOrigImage ()
Private Attributes
QImage	fullSizeImage
	Full size image.
QRect	selection
	Current selection.

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Constructor & Destructor Documentation

PanningPreviewInterface::PanningPreviewInterface (  QString  imageFilename, QWidget *  parent = 0, const char *  name = 0 )

Creates layout. Definition at line 15 of file panningPreviewInterface.cpp. References fullSizeImage, and selection. : SplitViewInterface (parent, name ) { //load full size image fullSizeImage = QImage( imageFilename ); //a 0-width selection is invalid and prevents //resize events from triggering painting //until the true selection region is set selection.setWidth( 0 ); }

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Member Function Documentation

void PanningPreviewInterface::generateOrigImage (   )  [private]

Definition at line 105 of file panningPreviewInterface.cpp. References fullSizeImage, selection, selectionChanged(), and SplitViewInterface::setImages(). Referenced by setSelection(). { //generate orig image //set adjusted image to null so repain won't occur until it is reset setImages( fullSizeImage.copy( selection.left(), selection.top(), selection.width(), selection.height() ), QImage() ); //emit signal indicating adjusted image is out of date emit selectionChanged(); }

QRect PanningPreviewInterface::getSelection (   )

Definition at line 117 of file panningPreviewInterface.cpp. Referenced by GrainEditor::generateAdjustedPreviewImage(), and GrainEditor::previewResized(). { return selection; }

QSize PanningPreviewInterface::paintingSize (   )

Definition at line 34 of file panningPreviewInterface.cpp. References fullSizeImage. Referenced by resizeEvent(), and setSelection(). { return QSize( QMIN( fullSizeImage.width(), size().width() ), QMIN( fullSizeImage.height(), size().height() ) ); }

void PanningPreviewInterface::resizeEvent (  QResizeEvent *   )  [protected, virtual]

Implements SplitViewInterface. Definition at line 40 of file panningPreviewInterface.cpp. References fullSizeImage, paintingSize(), selection, and setSelection(). { //center of new selection... QPoint center; //if selection not set then default to center of image if( selection.width() == 0) { //compute center selection center center = QPoint( fullSizeImage.width() / 2, fullSizeImage.height() / 2 ); } //else construct new selection that is centered over old selection else { //compute center selection center center = QPoint( selection.left() + selection.width()/2, selection.top() + selection.height()/2 ); } //determine width/height that will be used for painting QSize actualSize = paintingSize(); //compute new selection area centerd over old selection region QRect newSelection; newSelection.setLeft( center.x() - actualSize.width() /2 ); newSelection.setTop ( center.y() - actualSize.height()/2 ); newSelection.setRight( newSelection.left() + actualSize.width() - 1 ); newSelection.setBottom( newSelection.top() + actualSize.height() - 1 ); //set selection which will result in regenerating of orig and adjusted images setSelection( newSelection ); }

void PanningPreviewInterface::selectionChanged (   )  [signal]

Referenced by generateOrigImage().

void PanningPreviewInterface::setSelection (  QRect  selection  )  [slot]

Definition at line 74 of file panningPreviewInterface.cpp. References fullSizeImage, generateOrigImage(), paintingSize(), and selection. Referenced by resizeEvent(). { //set the selection selection = s; //get the available painting size QSize actualSize = paintingSize(); //if too wide or tall shrink selection if( selection.width() > actualSize.width() ) selection.setRight( selection.left() + actualSize.width() - 1 ); if( selection.height() > actualSize.height() ) selection.setBottom( selection.top() + actualSize.height() - 1 ); //shift selection area if it extends beyond image boundary if( selection.left() < 0 ) selection.moveBy( -selection.left(), 0 ); if( selection.top() < 0 ) selection.moveBy( 0, -selection.top() ); if( selection.right() > fullSizeImage.width()-1 ) selection.moveBy( (fullSizeImage.width()-1) - selection.right(), 0 ); if( selection.bottom() > fullSizeImage.height()-1 ) selection.moveBy( 0, (fullSizeImage.height()-1) - selection.bottom() ); //regenerate orig and adjusted images generateOrigImage(); }

QSize PanningPreviewInterface::sizeHint (   )  const [virtual]

Implements SplitViewInterface. Definition at line 28 of file panningPreviewInterface.cpp. { //subjetively chosen default size :) return QSize( 500, 400 ); }

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Member Data Documentation

QImage PanningPreviewInterface::fullSizeImage [private]

Full size image. Definition at line 46 of file panningPreviewInterface.h. Referenced by generateOrigImage(), paintingSize(), PanningPreviewInterface(), resizeEvent(), and setSelection().

QRect PanningPreviewInterface::selection [private]

Current selection. Definition at line 49 of file panningPreviewInterface.h. Referenced by generateOrigImage(), PanningPreviewInterface(), resizeEvent(), and setSelection().

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The documentation for this class was generated from the following files:

• panningPreviewInterface.h
• panningPreviewInterface.cpp

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