Abstract base class for all interactive plot tools. More...

#include <qgsplottool.h>

Inheritance diagram for QgsPlotTool:

[legend]

Signals
void	activated ()
	Emitted when the tool is activated.

void	deactivated ()
	Emitted when the tool is deactivated.

Public Member Functions
	~QgsPlotTool () override

QAction *	action ()
	Returns the action associated with the tool or `nullptr` if no action is associated.

virtual void	activate ()
	Called when the tool is set as the currently active plot tool.

QgsPlotCanvas *	canvas () const
	Returns the tool's plot canvas.

virtual bool	canvasToolTipEvent (QHelpEvent *event)
	Tooltip event for overriding.

virtual void	deactivate ()
	Called when the tool is being deactivated.

virtual Qgis::PlotToolFlags	flags () const
	Returns the flags for the plot tool.

virtual bool	gestureEvent (QGestureEvent *event)
	Gesture event for overriding.

bool	isActive () const
	Returns `true` if this tool is the current tool active on the plot canvas.

virtual void	keyPressEvent (QKeyEvent *event)
	Key press event for overriding.

virtual void	keyReleaseEvent (QKeyEvent *event)
	Key release event for overriding.

virtual void	plotDoubleClickEvent (QgsPlotMouseEvent *event)
	Mouse double-click event for overriding.

virtual void	plotMoveEvent (QgsPlotMouseEvent *event)
	Mouse move event for overriding.

virtual void	plotPressEvent (QgsPlotMouseEvent *event)
	Mouse press event for overriding.

virtual void	plotReleaseEvent (QgsPlotMouseEvent *event)
	Mouse release event for overriding.

virtual bool	populateContextMenuWithEvent (QMenu menu, QgsPlotMouseEvent event)
	Allows the tool to populate and customize the given menu, prior to showing it in response to a right-mouse button click.

void	setAction (QAction *action)
	Associates an action with this tool.

void	setCursor (const QCursor &cursor)
	Sets a user defined cursor for use when the tool is active.

QString	toolName () const
	Returns a user-visible, translated name for the tool.

virtual void	wheelEvent (QWheelEvent *event)
	Mouse wheel event for overriding.

Protected Member Functions
	QgsPlotTool (QgsPlotCanvas *canvas, const QString &name)
	Constructor takes a plot canvas as a parameter.

bool	isClickAndDrag (QPoint startViewPoint, QPoint endViewPoint) const
	Returns `true` if a mouse press/release operation which started at startViewPoint and ended at endViewPoint should be considered a "click and drag".

QgsPointXY	toCanvasCoordinates (const QgsPoint &point) const
	Converts a point in map coordinates to the associated canvas point.

QgsPoint	toMapCoordinates (const QgsPointXY &point) const
	Converts a point on the canvas to the associated map coordinate.

Static Protected Member Functions
static QPointF	constrainPointToRect (QPointF point, const QRectF &rect)
	Constrains a point to force it to fall within the specified rectangle.

Protected Attributes
QPointer< QAction >	mAction
	Optional action associated with tool.

QgsPlotCanvas *	mCanvas = nullptr
	The pointer to the canvas.

QCursor	mCursor = Qt::ArrowCursor
	Cursor used by tool.

QString	mToolName
	Translated name of the map tool.

Detailed Description

Abstract base class for all interactive plot tools.

Plot tools are user tools for manipulating and interacting with a QgsPlotCanvas.

Since: QGIS 3.26

Definition at line 57 of file qgsplottool.h.

Constructor & Destructor Documentation

◆ ~QgsPlotTool()

QgsPlotTool::~QgsPlotTool ( )

override

Definition at line 68 of file qgsplottool.cpp.

◆ QgsPlotTool()

QgsPlotTool::QgsPlotTool	(	QgsPlotCanvas *	canvas,
		const QString &	name
	)

protected

Constructor takes a plot canvas as a parameter.

Definition at line 25 of file qgsplottool.cpp.

Member Function Documentation

◆ action()

QAction * QgsPlotTool::action ( )

Returns the action associated with the tool or nullptr if no action is associated.

See also: setAction()

Definition at line 157 of file qgsplottool.cpp.

◆ activate()

void QgsPlotTool::activate ( )

virtual

Called when the tool is set as the currently active plot tool.

Reimplemented in QgsPlotToolTemporaryKeyPan, QgsPlotToolTemporaryMousePan, and QgsPlotToolTemporaryKeyZoom.

Definition at line 79 of file qgsplottool.cpp.

◆ activated

void QgsPlotTool::activated ( )

signal

Emitted when the tool is activated.

◆ canvas()

QgsPlotCanvas * QgsPlotTool::canvas ( ) const

Returns the tool's plot canvas.

Definition at line 147 of file qgsplottool.cpp.

◆ canvasToolTipEvent()

bool QgsPlotTool::canvasToolTipEvent ( QHelpEvent * event )

virtual

Tooltip event for overriding.

Returns true if the event was handled by the tool and should not be propagated further.

Definition at line 142 of file qgsplottool.cpp.

◆ constrainPointToRect()

QPointF QgsPlotTool::constrainPointToRect	(	QPointF	point,
		const QRectF &	rect
	)

staticprotected

Constrains a point to force it to fall within the specified rectangle.

Definition at line 53 of file qgsplottool.cpp.

◆ deactivate()

void QgsPlotTool::deactivate ( )

virtual

Called when the tool is being deactivated.

Reimplemented in QgsPlotToolPan, and QgsPlotToolZoom.

Definition at line 89 of file qgsplottool.cpp.

◆ deactivated

void QgsPlotTool::deactivated ( )

signal

Emitted when the tool is deactivated.

◆ flags()

Qgis::PlotToolFlags QgsPlotTool::flags ( ) const

virtual

Returns the flags for the plot tool.

Reimplemented in QgsPlotToolPan.

Definition at line 74 of file qgsplottool.cpp.

◆ gestureEvent()

bool QgsPlotTool::gestureEvent ( QGestureEvent * event )

virtual

Gesture event for overriding.

Returns true if the event was handled by the tool and should not be propagated further.

Definition at line 137 of file qgsplottool.cpp.

◆ isActive()

bool QgsPlotTool::isActive ( ) const

Returns true if this tool is the current tool active on the plot canvas.

Definition at line 97 of file qgsplottool.cpp.

◆ isClickAndDrag()

bool QgsPlotTool::isClickAndDrag	(	QPoint	startViewPoint,
		QPoint	endViewPoint
	)		const

protected

Returns true if a mouse press/release operation which started at startViewPoint and ended at endViewPoint should be considered a "click and drag".

If false is returned, the operation should be instead treated as just a click on startViewPoint.

Definition at line 46 of file qgsplottool.cpp.

◆ keyPressEvent()

void QgsPlotTool::keyPressEvent ( QKeyEvent * event )

virtual

Key press event for overriding.

The default implementation does nothing. When subclasses implement this method and have acted on the event, they must explicitly call event->accept() to prevent the event from being passed on to other widgets.

Reimplemented in QgsPlotToolZoom, and QgsPlotToolTemporaryKeyZoom.

Definition at line 127 of file qgsplottool.cpp.

◆ keyReleaseEvent()

void QgsPlotTool::keyReleaseEvent ( QKeyEvent * event )

virtual

Key release event for overriding.

The default implementation does nothing. When subclasses implement this method and have acted on the event, they must explicitly call event->accept() to prevent the event from being passed on to other widgets.

Reimplemented in QgsPlotToolZoom, QgsPlotToolTemporaryKeyPan, and QgsPlotToolTemporaryKeyZoom.

Definition at line 132 of file qgsplottool.cpp.

◆ plotDoubleClickEvent()

void QgsPlotTool::plotDoubleClickEvent ( QgsPlotMouseEvent * event )

virtual

Mouse double-click event for overriding.

The default implementation does nothing. When subclasses implement this method and have acted on the event, they must explicitly call event->accept() to prevent the event from being passed on to other widgets.

Definition at line 107 of file qgsplottool.cpp.

◆ plotMoveEvent()

void QgsPlotTool::plotMoveEvent ( QgsPlotMouseEvent * event )

virtual

Mouse move event for overriding.

The default implementation does nothing. When subclasses implement this method and have acted on the event, they must explicitly call event->accept() to prevent the event from being passed on to other widgets.

Reimplemented in QgsPlotToolPan, QgsPlotToolZoom, QgsPlotToolTemporaryKeyPan, and QgsPlotToolTemporaryMousePan.

Definition at line 102 of file qgsplottool.cpp.

◆ plotPressEvent()

void QgsPlotTool::plotPressEvent ( QgsPlotMouseEvent * event )

virtual

Mouse press event for overriding.

The default implementation does nothing. When subclasses implement this method and have acted on the event, they must explicitly call event->accept() to prevent the event from being passed on to other widgets.

Reimplemented in QgsPlotToolPan, and QgsPlotToolZoom.

Definition at line 112 of file qgsplottool.cpp.

◆ plotReleaseEvent()

void QgsPlotTool::plotReleaseEvent ( QgsPlotMouseEvent * event )

virtual

Mouse release event for overriding.

The default implementation does nothing. When subclasses implement this method and have acted on the event, they must explicitly call event->accept() to prevent the event from being passed on to other widgets.

Reimplemented in QgsPlotToolPan, QgsPlotToolZoom, QgsPlotToolTemporaryMousePan, and QgsPlotToolTemporaryKeyZoom.

Definition at line 117 of file qgsplottool.cpp.

◆ populateContextMenuWithEvent()

bool QgsPlotTool::populateContextMenuWithEvent	(	QMenu *	menu,
		QgsPlotMouseEvent *	event
	)

virtual

Allows the tool to populate and customize the given menu, prior to showing it in response to a right-mouse button click.

menu will be initially populated with a set of default, generic actions. Any new actions added to the menu should be correctly parented to menu.

A pointer to the plot mouse event can be provided to allow particular behavior depending on the plot tool.

This method can return true to inform the caller that the menu was effectively populated.

The default implementation does nothing and returns false.

Note: The context menu is only shown when the ShowContextMenu flag is present in flags().

Definition at line 167 of file qgsplottool.cpp.

◆ setAction()

void QgsPlotTool::setAction ( QAction * action )

Associates an action with this tool.

When the setTool method of QgsPlotCanvas is called the action's state will be set to on. Usually this will cause a toolbutton to appear pressed in and the previously used toolbutton to pop out.

See also: action()

Definition at line 152 of file qgsplottool.cpp.

◆ setCursor()

void QgsPlotTool::setCursor ( const QCursor & cursor )

Sets a user defined cursor for use when the tool is active.

Definition at line 162 of file qgsplottool.cpp.

◆ toCanvasCoordinates()

QgsPointXY QgsPlotTool::toCanvasCoordinates ( const QgsPoint & point ) const

protected

Converts a point in map coordinates to the associated canvas point.

May return an empty point if the map point cannot be converted to a canvas point.

Definition at line 41 of file qgsplottool.cpp.

◆ toMapCoordinates()

QgsPoint QgsPlotTool::toMapCoordinates ( const QgsPointXY & point ) const

protected

Converts a point on the canvas to the associated map coordinate.

May return an empty point if the canvas point cannot be converted to a map point.

Definition at line 36 of file qgsplottool.cpp.

◆ toolName()

QString QgsPlotTool::toolName ( ) const

inline

Returns a user-visible, translated name for the tool.

Definition at line 87 of file qgsplottool.h.

◆ wheelEvent()

void QgsPlotTool::wheelEvent ( QWheelEvent * event )

virtual

Mouse wheel event for overriding.

The default implementation does nothing. When subclasses implement this method and have acted on the event, they must explicitly call event->accept() to prevent the event from being passed on to other widgets.

Definition at line 122 of file qgsplottool.cpp.

Member Data Documentation

◆ mAction

QPointer< QAction > QgsPlotTool::mAction

protected

Optional action associated with tool.

Definition at line 273 of file qgsplottool.h.

◆ mCanvas

QgsPlotCanvas* QgsPlotTool::mCanvas = nullptr

protected

The pointer to the canvas.

Definition at line 267 of file qgsplottool.h.

◆ mCursor

QCursor QgsPlotTool::mCursor = Qt::ArrowCursor

protected

Cursor used by tool.

Definition at line 276 of file qgsplottool.h.

◆ mToolName

QString QgsPlotTool::mToolName

protected

Translated name of the map tool.

Definition at line 270 of file qgsplottool.h.

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

/build/qgis-3.40.0+99sid/src/gui/plot/qgsplottool.h
/build/qgis-3.40.0+99sid/src/gui/plot/qgsplottool.cpp

Signals

Public Member Functions

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ ~QgsPlotTool()

◆ QgsPlotTool()

Member Function Documentation

◆ action()

◆ activate()

◆ activated

◆ canvas()

◆ canvasToolTipEvent()

◆ constrainPointToRect()

◆ deactivate()

◆ deactivated

◆ flags()

◆ gestureEvent()

◆ isActive()

◆ isClickAndDrag()

◆ keyPressEvent()

◆ keyReleaseEvent()

◆ plotDoubleClickEvent()

◆ plotMoveEvent()

◆ plotPressEvent()

◆ plotReleaseEvent()

◆ populateContextMenuWithEvent()

◆ setAction()

◆ setCursor()

◆ toCanvasCoordinates()

◆ toMapCoordinates()

◆ toolName()

◆ wheelEvent()

Member Data Documentation

◆ mAction

◆ mCanvas

◆ mCursor

◆ mToolName