QGIS API Documentation: QgsMapOverviewCanvas Class Reference

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A widget that displays an overview map. More...

#include <qgsmapoverviewcanvas.h>

Collaboration diagram for QgsMapOverviewCanvas:

Collaboration graph

Public Slots
void	hasCrsTransformEnabled (bool flag)
void	destinationSrsChanged ()

Public Member Functions
	QgsMapOverviewCanvas (QWidget parent=0, QgsMapCanvas mapCanvas=NULL)
	~QgsMapOverviewCanvas ()
void	drawExtentRect ()
	used for overview canvas to reflect changed extent in main map canvas
void	refresh ()
	renders overview and updates panning widget
void	setBackgroundColor (const QColor &color)
	changes background color
void	setLayerSet (const QStringList &layerSet)
	updates layer set for overview
QStringList &	layerSet ()
void	enableAntiAliasing (bool flag)
void	updateFullExtent ()

Protected Member Functions
void	paintEvent (QPaintEvent *pe)
	Overridden paint event.
void	resizeEvent (QResizeEvent *e)
	Overridden resize event.
void	mouseMoveEvent (QMouseEvent *e)
	Overridden mouse move event.
void	mousePressEvent (QMouseEvent *e)
	Overridden mouse press event.
void	mouseReleaseEvent (QMouseEvent *e)
	Overridden mouse release event.
void	updatePanningWidget (const QPoint &pos)
	called when panning to reflect mouse movement

Protected Attributes
QgsPanningWidget *	mPanningWidget
	widget for panning map in overview
QPoint	mPanningCursorOffset
	position of cursor inside panning widget
QgsMapCanvas *	mMapCanvas
	main map canvas - used to get/set extent
QgsMapRenderer *	mMapRenderer
	for rendering overview
QPixmap	mPixmap
	pixmap where the map is stored
QColor	mBgColor
	background color
bool	mAntiAliasing
	indicates whether antialiasing will be used for rendering
QSize	mNewSize
	resized canvas size

Detailed Description

A widget that displays an overview map.

Definition at line 37 of file qgsmapoverviewcanvas.h.

Constructor & Destructor Documentation

QgsMapOverviewCanvas::QgsMapOverviewCanvas	(	QWidget *	parent = `0`,
		QgsMapCanvas *	mapCanvas = `NULL`
	)

Definition at line 70 of file qgsmapoverviewcanvas.cpp.

References QgsMapRenderer::enableOverviewMode(), mMapRenderer, mPanningWidget, and setBackgroundColor().

QgsMapOverviewCanvas::~QgsMapOverviewCanvas ( )

Definition at line 82 of file qgsmapoverviewcanvas.cpp.

References mMapRenderer.

Member Function Documentation

void QgsMapOverviewCanvas::destinationSrsChanged ( )

slot

Definition at line 322 of file qgsmapoverviewcanvas.cpp.

References QgsMapRenderer::destinationCrs(), QgsMapCanvas::mapRenderer(), mMapCanvas, mMapRenderer, and QgsMapRenderer::setDestinationCrs().

void QgsMapOverviewCanvas::drawExtentRect ( )

used for overview canvas to reflect changed extent in main map canvas

Definition at line 108 of file qgsmapoverviewcanvas.cpp.

References QgsMapRenderer::coordinateTransform(), QgsMapCanvas::extent(), QgsMapRenderer::extent(), QgsRectangle::isEmpty(), mMapCanvas, mMapRenderer, mPanningWidget, QgsDebugMsg, QgsMapToPixel::transform(), QgsRectangle::xMaximum(), QgsRectangle::xMinimum(), QgsRectangle::yMaximum(), and QgsRectangle::yMinimum().

Referenced by refresh(), QgsMapCanvas::setExtent(), updateFullExtent(), QgsMapCanvas::zoomToNextExtent(), and QgsMapCanvas::zoomToPreviousExtent().

void QgsMapOverviewCanvas::enableAntiAliasing ( bool flag )

inline

Definition at line 60 of file qgsmapoverviewcanvas.h.

Referenced by QgsMapCanvas::enableAntiAliasing().

void QgsMapOverviewCanvas::hasCrsTransformEnabled ( bool flag )

slot

Definition at line 317 of file qgsmapoverviewcanvas.cpp.

References mMapRenderer, and QgsMapRenderer::setProjectionsEnabled().

QStringList & QgsMapOverviewCanvas::layerSet ( )

Definition at line 328 of file qgsmapoverviewcanvas.cpp.

References QgsMapRenderer::layerSet(), and mMapRenderer.

Referenced by QgsMapCanvas::setLayerSet().

void QgsMapOverviewCanvas::mouseMoveEvent ( QMouseEvent * e )

protected

Overridden mouse move event.

Definition at line 239 of file qgsmapoverviewcanvas.cpp.

References updatePanningWidget().

void QgsMapOverviewCanvas::mousePressEvent ( QMouseEvent * e )

protected

Overridden mouse press event.

Definition at line 191 of file qgsmapoverviewcanvas.cpp.

References mPanningCursorOffset, mPanningWidget, and updatePanningWidget().

void QgsMapOverviewCanvas::mouseReleaseEvent ( QMouseEvent * e )

protected

Overridden mouse release event.

Definition at line 212 of file qgsmapoverviewcanvas.cpp.

References QgsMapRenderer::coordinateTransform(), QgsMapCanvas::extent(), QgsRectangle::height(), mMapCanvas, mMapRenderer, mPanningWidget, QgsDebugMsg, QgsMapCanvas::refresh(), QgsMapCanvas::setExtent(), QgsRectangle::setXMaximum(), QgsRectangle::setXMinimum(), QgsRectangle::setYMaximum(), QgsRectangle::setYMinimum(), QgsMapToPixel::toMapCoordinates(), QgsRectangle::width(), QgsPoint::x(), and QgsPoint::y().

void QgsMapOverviewCanvas::paintEvent ( QPaintEvent * pe )

protected

Overridden paint event.

Definition at line 92 of file qgsmapoverviewcanvas.cpp.

References mMapRenderer, mNewSize, mPixmap, refresh(), QgsMapRenderer::setOutputSize(), and updateFullExtent().

void QgsMapOverviewCanvas::refresh ( )

renders overview and updates panning widget

Definition at line 257 of file qgsmapoverviewcanvas.cpp.

References drawExtentRect(), mAntiAliasing, mBgColor, mMapRenderer, mPixmap, and QgsMapRenderer::render().

Referenced by paintEvent(), and QgsMapCanvas::updateOverview().

void QgsMapOverviewCanvas::resizeEvent ( QResizeEvent * e )

protected

Overridden resize event.

Definition at line 87 of file qgsmapoverviewcanvas.cpp.

References mNewSize.

void QgsMapOverviewCanvas::setBackgroundColor ( const QColor & color )

changes background color

Definition at line 284 of file qgsmapoverviewcanvas.cpp.

References mBgColor.

Referenced by QgsMapOverviewCanvas().

void QgsMapOverviewCanvas::setLayerSet ( const QStringList & layerSet )

updates layer set for overview

Definition at line 294 of file qgsmapoverviewcanvas.cpp.

References mMapRenderer, QgsDebugMsg, QgsMapRenderer::setLayerSet(), updateFullExtent(), and QgsMapRenderer::updateFullExtent().

Referenced by QgsMapCanvas::setLayerSet().

void QgsMapOverviewCanvas::updateFullExtent ( )

Definition at line 303 of file qgsmapoverviewcanvas.cpp.

References drawExtentRect(), QgsMapRenderer::fullExtent(), QgsMapRenderer::layerSet(), mMapRenderer, QgsRectangle::scale(), and QgsMapRenderer::setExtent().

Referenced by paintEvent(), and setLayerSet().

void QgsMapOverviewCanvas::updatePanningWidget ( const QPoint & pos )

protected

called when panning to reflect mouse movement

Definition at line 249 of file qgsmapoverviewcanvas.cpp.

References mPanningCursorOffset, and mPanningWidget.

Referenced by mouseMoveEvent(), and mousePressEvent().

Member Data Documentation

bool QgsMapOverviewCanvas::mAntiAliasing

protected

indicates whether antialiasing will be used for rendering

Definition at line 109 of file qgsmapoverviewcanvas.h.

Referenced by refresh().

QColor QgsMapOverviewCanvas::mBgColor

protected

background color

Definition at line 106 of file qgsmapoverviewcanvas.h.

Referenced by refresh(), and setBackgroundColor().

QgsMapCanvas* QgsMapOverviewCanvas::mMapCanvas

protected

main map canvas - used to get/set extent

Definition at line 97 of file qgsmapoverviewcanvas.h.

Referenced by destinationSrsChanged(), drawExtentRect(), and mouseReleaseEvent().

QgsMapRenderer* QgsMapOverviewCanvas::mMapRenderer

protected

for rendering overview

Definition at line 100 of file qgsmapoverviewcanvas.h.

Referenced by destinationSrsChanged(), drawExtentRect(), hasCrsTransformEnabled(), layerSet(), mouseReleaseEvent(), paintEvent(), QgsMapOverviewCanvas(), refresh(), setLayerSet(), updateFullExtent(), and ~QgsMapOverviewCanvas().

QSize QgsMapOverviewCanvas::mNewSize

protected

resized canvas size

Definition at line 112 of file qgsmapoverviewcanvas.h.

Referenced by paintEvent(), and resizeEvent().

QPoint QgsMapOverviewCanvas::mPanningCursorOffset

protected

position of cursor inside panning widget

Definition at line 94 of file qgsmapoverviewcanvas.h.

Referenced by mousePressEvent(), and updatePanningWidget().

QgsPanningWidget* QgsMapOverviewCanvas::mPanningWidget

protected

widget for panning map in overview

Definition at line 91 of file qgsmapoverviewcanvas.h.

Referenced by drawExtentRect(), mousePressEvent(), mouseReleaseEvent(), QgsMapOverviewCanvas(), and updatePanningWidget().

QPixmap QgsMapOverviewCanvas::mPixmap

protected

pixmap where the map is stored

Definition at line 103 of file qgsmapoverviewcanvas.h.

Referenced by paintEvent(), and refresh().

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

/tmp/buildd/qgis-2.0.1/src/gui/qgsmapoverviewcanvas.h
/tmp/buildd/qgis-2.0.1/src/gui/qgsmapoverviewcanvas.cpp