LineString Class Reference
A collection of Point objects to describe a line. More...
#include <linestring.h>
Public Slots | |
| virtual void | setVisible (bool visible) |
| if visible is true, the layer is made visible | |
Signals | |
| void | geometryClicked (Geometry *geometry, QPoint point) |
| This signal is emitted when a Geometry is clicked. | |
| void | positionChanged (Geometry *geom) |
| A Geometry emits this signal, when its position gets changed. | |
Public Member Functions | |
| void | addPoint (Point *point) |
| adds a point at the end of the LineString | |
| virtual QRectF | boundingBox () |
| returns the BoundingBox | |
| virtual QList< Geometry * > | clickedPoints () |
| returns the clicked Points | |
| bool | Equals (Geometry *geom) |
| virtual bool | hasClickedPoints () const |
| returns true if the LineString has clicked Points | |
| virtual bool | hasPoints () const |
| returns true if the LineString has Childs | |
| bool | isVisible () const |
| returns true if this Geometry is visible | |
| LineString (QList< Point * > const points, QString name=QString(), QPen *pen=0) | |
| constructor | |
| QString | name () const |
| returns the name of this Geometry | |
| int | numberOfPoints () const |
| returns the number of Points the LineString consists of | |
| Geometry * | parentGeometry () const |
| returns the parent Geometry of this Geometry | |
| QPen * | pen () const |
| returns the QPen which is used on drawing | |
| QList< Point * > | points () |
| returns the points of the LineString | |
| void | setName (QString name) |
| sets the name of the geometry | |
| void | setPoints (QList< Point * > points) |
| sets the given list as points of the LineString | |
| QString | toString () |
| returns a String representation of this Geometry | |
Detailed Description
A collection of Point objects to describe a line.A LineString is a Curve with linear interpolation between Points. Each consecutive pair of Points defines a Line segment.
Constructor & Destructor Documentation
| LineString | ( | QList< Point * > const | points, | |
| QString | name = QString(), |
|||
| QPen * | pen = 0 | |||
| ) |
constructor
The constructor of a LineString takes a list of Points to form a line.
- Parameters:
-
points a list of points name the name of the LineString pen a QPen can be used to modify the look of the line.
References LineString::setPoints().
Member Function Documentation
| void addPoint | ( | Point * | point | ) |
adds a point at the end of the LineString
- Parameters:
-
point the point which should be added to the LineString
| QRectF boundingBox | ( | ) | [virtual] |
returns the BoundingBox
The bounding box in world coordinates
- Returns:
- the BoundingBox
Implements Geometry.
References Point::latitude(), and Point::longitude().
| QList< Geometry * > clickedPoints | ( | ) | [virtual] |
returns the clicked Points
If a LineString was clicked it could be neccessary to figure out which of its points where clicked. Do do so the methods hasPoints() and clickedPoints() can be used. When a point is added to a LineString the Point becomes its child. It is possible (depending on the zoomfactor) to click more than one Point of a LineString, so this method returns a list.
- Returns:
- the clicked Points of the LineString
Reimplemented from Geometry.
| bool Equals | ( | Geometry * | geom | ) | [inherited] |
| void geometryClicked | ( | Geometry * | geometry, | |
| QPoint | point | |||
| ) | [signal, inherited] |
This signal is emitted when a Geometry is clicked.
A Geometry is clickable, if the containing layer is clickable. The objects emits a signal if it gets clicked
- Parameters:
-
geometry The clicked Geometry point -unused-
Referenced by Point::Touches().
| bool hasClickedPoints | ( | ) | const [virtual] |
returns true if the LineString has clicked Points
- Returns:
- true if childs of a LineString were clicked
- See also:
- clickedPoints()
Reimplemented from Geometry.
| bool hasPoints | ( | ) | const [virtual] |
returns true if the LineString has Childs
This is equal to: numberOfPoints() > 0
- Returns:
- true it the LineString has Childs (=Points)
- See also:
- clickedPoints()
Reimplemented from Geometry.
| bool isVisible | ( | ) | const [inherited] |
returns true if this Geometry is visible
- Returns:
- true if this Geometry is visible
Referenced by Point::Touches().
| QString name | ( | ) | const [inherited] |
| int numberOfPoints | ( | ) | const |
returns the number of Points the LineString consists of
- Returns:
- the number of the LineString´s Points
| Geometry * parentGeometry | ( | ) | const [inherited] |
returns the parent Geometry of this Geometry
A LineString is a composition of many Points. This methods returns the parent (the LineString) of a Point
| QPen * pen | ( | ) | const [inherited] |
returns the QPen which is used on drawing
The pen is set depending on the Geometry. A CirclePoint for example takes one with the constructor.
- Returns:
- the QPen which is used for drawing
| QList< Point * > points | ( | ) | [virtual] |
returns the points of the LineString
- Returns:
- a list with the points of the LineString
Implements Geometry.
| void positionChanged | ( | Geometry * | geom | ) | [signal, inherited] |
| void setName | ( | QString | name | ) | [inherited] |
sets the name of the geometry
- Parameters:
-
name the new name of the geometry
| void setPoints | ( | QList< Point * > | points | ) |
sets the given list as points of the LineString
- Parameters:
-
points the points which should be set for the LineString
Referenced by LineString::LineString().
| void setVisible | ( | bool | visible | ) | [virtual, slot, inherited] |
if visible is true, the layer is made visible
- Parameters:
-
visible if the layer should be visible
Reimplemented in Point.
References Geometry::boundingBox().
| QString toString | ( | ) | [inherited] |
The documentation for this class was generated from the following files:
- linestring.h
- linestring.cpp
