PanningPreviewInterface Class Reference

#include <panningPreviewInterface.h>

Inheritance diagram for PanningPreviewInterface:

Collaboration diagram for PanningPreviewInterface:

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 ()
Public Member Functions inherited from SplitViewInterface
	SplitViewInterface (QWidget *parent=0, const char *name=0)
	Creates layout.
void	setPreviewMode (PREVIEW_MODE mode, bool forceDrawLabel=false)
	Sets preview mode.
virtual QSize	minimumSizeHint () const
void	setImages (QImage origImage, QImage adjustedImage)
void	setAdjustedImage (QImage adjustedImage)
	sets adjusted image and repaints
QImage &	getOrigImage ()
	returns orig image object

Protected Member Functions
void	resizeEvent (QResizeEvent *)
Protected Member Functions inherited from SplitViewInterface
void	paintEvent (QPaintEvent *e)
void	mousePressEvent (QMouseEvent *e)
void	mouseReleaseEvent (QMouseEvent *)
void	mouseMoveEvent (QMouseEvent *e)

Private Member Functions
void	generateOrigImage ()

Private Attributes
QImage	fullSizeImage
	Full size image.
QRect	selection
	Current selection.

Detailed Description

Definition at line 23 of file panningPreviewInterface.h.

Constructor & Destructor Documentation

PanningPreviewInterface()

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

Creates layout.

Definition at line 17 of file panningPreviewInterface.cpp.

                                                                                      : 
                                                  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 );
}

References fullSizeImage, and selection.

Member Function Documentation

generateOrigImage()

void PanningPreviewInterface::generateOrigImage ( )

private

Definition at line 107 of file panningPreviewInterface.cpp.

{
  //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();
}

References fullSizeImage, selection, selectionChanged(), and SplitViewInterface::setImages().

Referenced by setSelection().

getSelection()

QRect PanningPreviewInterface::getSelection

(

)

Definition at line 119 of file panningPreviewInterface.cpp.

{ return selection; }

References selection.

Referenced by GrainEditor::generateAdjustedPreviewImage(), and GrainEditor::previewResized().

paintingSize()

QSize PanningPreviewInterface::paintingSize

(

)

Definition at line 36 of file panningPreviewInterface.cpp.

{
  return QSize( QMIN( fullSizeImage.width(),  size().width()  ),
                QMIN( fullSizeImage.height(), size().height() ) );
}

References fullSizeImage, height, and width.

Referenced by resizeEvent(), and setSelection().

resizeEvent()

void PanningPreviewInterface::resizeEvent ( QResizeEvent * )

protectedvirtual

Implements SplitViewInterface.

Definition at line 42 of file panningPreviewInterface.cpp.

{
  //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 ); 
}

References fullSizeImage, paintingSize(), selection, and setSelection().

selectionChanged

void PanningPreviewInterface::selectionChanged ( )

signal

Referenced by generateOrigImage().

setSelection

void PanningPreviewInterface::setSelection ( QRect selection )

slot

Definition at line 76 of file panningPreviewInterface.cpp.

{
  //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();
}

References fullSizeImage, generateOrigImage(), paintingSize(), and selection.

Referenced by resizeEvent().

sizeHint()

QSize PanningPreviewInterface::sizeHint ( ) const

virtual

Implements SplitViewInterface.

Definition at line 30 of file panningPreviewInterface.cpp.

{
  //subjetively chosen default size :)
  return QSize( 500, 400 );
}

Member Data Documentation

fullSizeImage

QImage PanningPreviewInterface::fullSizeImage

private

Full size image.

Definition at line 48 of file panningPreviewInterface.h.

Referenced by generateOrigImage(), paintingSize(), PanningPreviewInterface(), resizeEvent(), and setSelection().

selection

QRect PanningPreviewInterface::selection

private

Current selection.

Definition at line 51 of file panningPreviewInterface.h.

Referenced by generateOrigImage(), getSelection(), PanningPreviewInterface(), resizeEvent(), and setSelection().

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

• panningPreviewInterface.h
• panningPreviewInterface.cpp