QGIS API Documentation  3.0.2-Girona (307d082)
Classes | Public Types | Public Slots | Signals | Public Member Functions | Protected Member Functions | Protected Attributes | List of all members
QgsMapToolIdentify Class Reference

Map tool for identifying features in layers. More...

#include <qgsmaptoolidentify.h>

Inheritance diagram for QgsMapToolIdentify:
Inheritance graph
[legend]

Classes

struct  IdentifyResult
 

Public Types

enum  IdentifyMode {
  DefaultQgsSetting = -1, ActiveLayer, TopDownStopAtFirst, TopDownAll,
  LayerSelection
}
 
enum  Type { VectorLayer = 1, RasterLayer = 2, AllLayers = VectorLayer | RasterLayer }
 
- Public Types inherited from QgsMapTool
enum  Flag { Transient = 1 << 1, EditTool = 1 << 2, AllowZoomRect = 1 << 3 }
 Enumeration of flags that adjust the way the map tool operates. More...
 

Public Slots

void formatChanged (QgsRasterLayer *layer)
 

Signals

void changedRasterResults (QList< QgsMapToolIdentify::IdentifyResult > &)
 
void identifyMessage (const QString &)
 
void identifyProgress (int, int)
 
- Signals inherited from QgsMapTool
void activated ()
 signal emitted once the map tool is activated More...
 
void deactivated ()
 signal emitted once the map tool is deactivated More...
 
void messageDiscarded ()
 emit signal to clear previous message More...
 
void messageEmitted (const QString &message, Qgis::MessageLevel=Qgis::Info)
 emit a message More...
 

Public Member Functions

 QgsMapToolIdentify (QgsMapCanvas *canvas)
 constructor More...
 
 ~QgsMapToolIdentify () override
 
void activate () override
 called when set as currently active map tool More...
 
void canvasMoveEvent (QgsMapMouseEvent *e) override
 Mouse move event for overriding. Default implementation does nothing. More...
 
void canvasPressEvent (QgsMapMouseEvent *e) override
 Mouse press event for overriding. Default implementation does nothing. More...
 
void canvasReleaseEvent (QgsMapMouseEvent *e) override
 Mouse release event for overriding. Default implementation does nothing. More...
 
void deactivate () override
 called when map tool is being deactivated More...
 
Flags flags () const override
 Returns the flags for the map tool. More...
 
QList< QgsMapToolIdentify::IdentifyResultidentify (int x, int y, const QList< QgsMapLayer *> &layerList=QList< QgsMapLayer *>(), IdentifyMode mode=DefaultQgsSetting)
 Performs the identification. More...
 
QList< QgsMapToolIdentify::IdentifyResultidentify (int x, int y, IdentifyMode mode, LayerType layerType=AllLayers)
 Performs the identification. More...
 
QgsIdentifyMenuidentifyMenu ()
 return a pointer to the identify menu which will be used in layer selection mode this menu can also be customized More...
 
- Public Member Functions inherited from QgsMapTool
 ~QgsMapTool () override
 
QAction * action ()
 Return associated action with map tool or NULL if no action is associated. More...
 
QAbstractButton * button ()
 Return associated button with map tool or NULL if no button is associated. More...
 
QgsMapCanvascanvas ()
 returns pointer to the tool's map canvas More...
 
virtual void canvasDoubleClickEvent (QgsMapMouseEvent *e)
 Mouse double-click event for overriding. Default implementation does nothing. More...
 
virtual void clean ()
 convenient method to clean members More...
 
virtual bool gestureEvent (QGestureEvent *e)
 gesture event for overriding. Default implementation does nothing. More...
 
virtual void keyPressEvent (QKeyEvent *e)
 Key event for overriding. Default implementation does nothing. More...
 
virtual void keyReleaseEvent (QKeyEvent *e)
 Key event for overriding. Default implementation does nothing. More...
 
void setAction (QAction *action)
 Use this to associate a QAction to this maptool. More...
 
void setButton (QAbstractButton *button)
 Use this to associate a button to this maptool. More...
 
virtual void setCursor (const QCursor &cursor)
 Set a user defined cursor. More...
 
QString toolName ()
 Emit map tool changed with the old tool. More...
 
virtual void wheelEvent (QWheelEvent *e)
 Mouse wheel event for overriding. Default implementation does nothing. More...
 

Protected Member Functions

QList< QgsMapToolIdentify::IdentifyResultidentify (int x, int y, IdentifyMode mode, const QList< QgsMapLayer *> &layerList, LayerType layerType=AllLayers)
 Performs the identification. More...
 
bool identifyLayer (QList< QgsMapToolIdentify::IdentifyResult > *results, QgsMapLayer *layer, const QgsPointXY &point, const QgsRectangle &viewExtent, double mapUnitsPerPixel, QgsMapToolIdentify::LayerType layerType=AllLayers)
 Call the right method depending on layer type. More...
 
bool identifyRasterLayer (QList< QgsMapToolIdentify::IdentifyResult > *results, QgsRasterLayer *layer, QgsPointXY point, const QgsRectangle &viewExtent, double mapUnitsPerPixel)
 
bool identifyVectorLayer (QList< QgsMapToolIdentify::IdentifyResult > *results, QgsVectorLayer *layer, const QgsPointXY &point)
 
- Protected Member Functions inherited from QgsMapTool
 QgsMapTool (QgsMapCanvas *canvas)
 constructor takes map canvas as a parameter More...
 
QPoint toCanvasCoordinates (const QgsPointXY &point)
 transformation from map coordinates to screen coordinates More...
 
QgsPointXY toLayerCoordinates (const QgsMapLayer *layer, QPoint point)
 transformation from screen coordinates to layer's coordinates More...
 
QgsPointXY toLayerCoordinates (const QgsMapLayer *layer, const QgsPointXY &point)
 transformation from map coordinates to layer's coordinates More...
 
QgsRectangle toLayerCoordinates (const QgsMapLayer *layer, const QgsRectangle &rect)
 trnasformation of the rect from map coordinates to layer's coordinates More...
 
QgsPointXY toMapCoordinates (QPoint point)
 transformation from screen coordinates to map coordinates More...
 
QgsPointXY toMapCoordinates (const QgsMapLayer *layer, const QgsPointXY &point)
 transformation from layer's coordinates to map coordinates (which is different in case reprojection is used) More...
 
QgsPoint toMapCoordinates (const QgsMapLayer *layer, const QgsPoint &point)
 transformation from layer's coordinates to map coordinates (which is different in case reprojection is used) More...
 

Protected Attributes

QgsIdentifyMenumIdentifyMenu = nullptr
 
- Protected Attributes inherited from QgsMapTool
QAction * mAction = nullptr
 optionally map tool can have pointer to action which will be used to set that action as active More...
 
QAbstractButton * mButton = nullptr
 optionally map tool can have pointer to a button which will be used to set that action as active More...
 
QgsMapCanvasmCanvas = nullptr
 pointer to map canvas More...
 
QCursor mCursor
 cursor used in map tool More...
 
QString mToolName
 translated name of the map tool More...
 

Additional Inherited Members

- Static Public Member Functions inherited from QgsMapTool
static double searchRadiusMM ()
 Get search radius in mm. More...
 
static double searchRadiusMU (const QgsRenderContext &context)
 Get search radius in map units for given context. More...
 
static double searchRadiusMU (QgsMapCanvas *canvas)
 Get search radius in map units for given canvas. More...
 

Detailed Description

Map tool for identifying features in layers.

after selecting a point, performs the identification:

Definition at line 46 of file qgsmaptoolidentify.h.

Member Enumeration Documentation

◆ IdentifyMode

Enumerator
DefaultQgsSetting 
ActiveLayer 
TopDownStopAtFirst 
TopDownAll 
LayerSelection 

Definition at line 52 of file qgsmaptoolidentify.h.

◆ Type

Enumerator
VectorLayer 
RasterLayer 
AllLayers 

Definition at line 62 of file qgsmaptoolidentify.h.

Constructor & Destructor Documentation

◆ QgsMapToolIdentify()

QgsMapToolIdentify::QgsMapToolIdentify ( QgsMapCanvas canvas)

constructor

Definition at line 52 of file qgsmaptoolidentify.cpp.

◆ ~QgsMapToolIdentify()

QgsMapToolIdentify::~QgsMapToolIdentify ( )
override

Definition at line 61 of file qgsmaptoolidentify.cpp.

Member Function Documentation

◆ activate()

void QgsMapToolIdentify::activate ( )
overridevirtual

called when set as currently active map tool

Reimplemented from QgsMapTool.

Definition at line 171 of file qgsmaptoolidentify.cpp.

◆ canvasMoveEvent()

void QgsMapToolIdentify::canvasMoveEvent ( QgsMapMouseEvent e)
overridevirtual

Mouse move event for overriding. Default implementation does nothing.

Reimplemented from QgsMapTool.

Definition at line 66 of file qgsmaptoolidentify.cpp.

◆ canvasPressEvent()

void QgsMapToolIdentify::canvasPressEvent ( QgsMapMouseEvent e)
overridevirtual

Mouse press event for overriding. Default implementation does nothing.

Reimplemented from QgsMapTool.

Definition at line 71 of file qgsmaptoolidentify.cpp.

◆ canvasReleaseEvent()

void QgsMapToolIdentify::canvasReleaseEvent ( QgsMapMouseEvent e)
overridevirtual

Mouse release event for overriding. Default implementation does nothing.

Reimplemented from QgsMapTool.

Reimplemented in QgsMapToolIdentifyFeature.

Definition at line 76 of file qgsmaptoolidentify.cpp.

◆ changedRasterResults

void QgsMapToolIdentify::changedRasterResults ( QList< QgsMapToolIdentify::IdentifyResult > &  )
signal

◆ deactivate()

void QgsMapToolIdentify::deactivate ( )
overridevirtual

called when map tool is being deactivated

Reimplemented from QgsMapTool.

Definition at line 176 of file qgsmaptoolidentify.cpp.

◆ flags()

Flags QgsMapToolIdentify::flags ( ) const
inlineoverridevirtual

Returns the flags for the map tool.

Since
QGIS 2.16

Reimplemented from QgsMapTool.

Definition at line 99 of file qgsmaptoolidentify.h.

◆ formatChanged

void QgsMapToolIdentify::formatChanged ( QgsRasterLayer layer)
slot

Definition at line 699 of file qgsmaptoolidentify.cpp.

◆ identify() [1/3]

QList< QgsMapToolIdentify::IdentifyResult > QgsMapToolIdentify::identify ( int  x,
int  y,
const QList< QgsMapLayer *> &  layerList = QList<QgsMapLayer *>(),
IdentifyMode  mode = DefaultQgsSetting 
)

Performs the identification.

Parameters
xx coordinates of mouseEvent
yy coordinates of mouseEvent
layerListPerforms the identification within the given list of layers. Default value is an empty list, i.e. uses all the layers.
modeIdentification mode. Can use Qgis default settings or a defined mode. Default mode is DefaultQgsSetting.
Returns
a list of IdentifyResult

Definition at line 81 of file qgsmaptoolidentify.cpp.

◆ identify() [2/3]

QList< QgsMapToolIdentify::IdentifyResult > QgsMapToolIdentify::identify ( int  x,
int  y,
IdentifyMode  mode,
LayerType  layerType = AllLayers 
)

Performs the identification.

To avoid being forced to specify IdentifyMode with a list of layers this has been made private and two publics methods are offered

Parameters
xx coordinates of mouseEvent
yy coordinates of mouseEvent
modeIdentification mode. Can use Qgis default settings or a defined mode.
layerTypeOnly performs identification in a certain type of layers (raster, vector). Default value is AllLayers.
Returns
a list of IdentifyResult

Definition at line 86 of file qgsmaptoolidentify.cpp.

◆ identify() [3/3]

QList< QgsMapToolIdentify::IdentifyResult > QgsMapToolIdentify::identify ( int  x,
int  y,
IdentifyMode  mode,
const QList< QgsMapLayer *> &  layerList,
LayerType  layerType = AllLayers 
)
protected

Performs the identification.

To avoid being forced to specify IdentifyMode with a list of layers this has been made private and two publics methods are offered

Parameters
xx coordinates of mouseEvent
yy coordinates of mouseEvent
modeIdentification mode. Can use Qgis default settings or a defined mode.
layerListPerforms the identification within the given list of layers.
layerTypeOnly performs identification in a certain type of layers (raster, vector).
Returns
a list of IdentifyResult

Definition at line 91 of file qgsmaptoolidentify.cpp.

◆ identifyLayer()

bool QgsMapToolIdentify::identifyLayer ( QList< QgsMapToolIdentify::IdentifyResult > *  results,
QgsMapLayer layer,
const QgsPointXY point,
const QgsRectangle viewExtent,
double  mapUnitsPerPixel,
QgsMapToolIdentify::LayerType  layerType = AllLayers 
)
protected

Call the right method depending on layer type.

Definition at line 181 of file qgsmaptoolidentify.cpp.

◆ identifyMenu()

QgsIdentifyMenu* QgsMapToolIdentify::identifyMenu ( )
inline

return a pointer to the identify menu which will be used in layer selection mode this menu can also be customized

Definition at line 130 of file qgsmaptoolidentify.h.

◆ identifyMessage

void QgsMapToolIdentify::identifyMessage ( const QString &  )
signal

◆ identifyProgress

void QgsMapToolIdentify::identifyProgress ( int  ,
int   
)
signal

◆ identifyRasterLayer()

bool QgsMapToolIdentify::identifyRasterLayer ( QList< QgsMapToolIdentify::IdentifyResult > *  results,
QgsRasterLayer layer,
QgsPointXY  point,
const QgsRectangle viewExtent,
double  mapUnitsPerPixel 
)
protected

Definition at line 463 of file qgsmaptoolidentify.cpp.

◆ identifyVectorLayer()

bool QgsMapToolIdentify::identifyVectorLayer ( QList< QgsMapToolIdentify::IdentifyResult > *  results,
QgsVectorLayer layer,
const QgsPointXY point 
)
protected

Definition at line 197 of file qgsmaptoolidentify.cpp.

Member Data Documentation

◆ mIdentifyMenu

QgsIdentifyMenu* QgsMapToolIdentify::mIdentifyMenu = nullptr
protected

Definition at line 154 of file qgsmaptoolidentify.h.


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