public class TLcdGXYShapePainter extends Object implements ILcdGXYPainterProvider, ILcdGXYEditorProvider, ILcdGXYPathPainter, ILcdGXYEditor, ILcdPropertyChangeSource
A painter and editor for all supported shape types.
The styling can be configured (for all shape types at once) by using one of the following methods:
setLineStyle
, when painting line shapes.setFillStyle
, when painting area shapes.setFontStyle
, when painting text shapes.setIconProvider
, when painting point objects.setSelectedIconProvider
, when painting selected point objects. setAntiAliased
BODY, CREATING, DEFAULT, HANDLES, RESHAPING, SELECTED, SNAPS, TRANSLATING
CREATING, END_CREATION, RESHAPED, START_CREATION, TRANSLATED
Constructor and Description |
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TLcdGXYShapePainter()
Creates a new painter/editor provider with default settings.
|
Modifier and Type | Method and Description |
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boolean |
acceptSnapTarget(Graphics aGraphics,
ILcdGXYContext aGXYContext)
Returns whether the object set to the editor can be edited so that (part of) the object snaps to the object passed
as snap target in the context.
|
void |
addPropertyChangeListener(PropertyChangeListener aPropertyChangeListener)
Registers the given
PropertyChangeListener to be notified when this object's
properties change. |
void |
anchorPointSFCT(Graphics aGraphics,
int aMode,
ILcdGXYContext aGXYContext,
Point aPointSFCT)
Moves the Point passed to the location (in view coordinates, pixels) of the anchor point of the representation of
the object in the given mode taking into account the given context.
|
boolean |
appendAWTPath(ILcdGXYContext aGXYContext,
int aRenderMode,
ILcdAWTPath aAWTPathSFCT)
Appends a discretized representation in view coordinates to the given path.
|
boolean |
appendGeneralPath(ILcdGXYContext aGXYContext,
int aRenderMode,
ILcdGeneralPath aGeneralPathSFCT)
Appends a discretized representation in world coordinates to the given path.
|
void |
boundsSFCT(Graphics aGraphics,
int aMode,
ILcdGXYContext aGXYContext,
ILcd2DEditableBounds aBoundsSFCT)
Sets the supplied bounds (in view coordinates, pixels) so that it encompasses the representation of the object
in the given mode taking into account the given context.
|
Object |
clone()
Redefines
Object.clone to make it public. |
boolean |
edit(Graphics aGraphics,
int aMode,
ILcdGXYContext aGXYContext)
Defines how an object shall be edited by this editor, taking into account the mode and the
context passed.
|
int |
getCreationClickCount()
Returns the number user interactions required to complete the initialization of an object set to this editor.
|
Cursor |
getCursor(Graphics aGraphics,
int aMode,
ILcdGXYContext aGXYContext)
Returns a cursor that clarifies the mode and context the painter is operating in.
|
String |
getDisplayName()
Returns a textual representation of this painter.
|
int |
getEditMode()
Returns how shapes are painted when edited.
|
ILcdGXYPainterStyle |
getFillStyle()
Returns the fill style.
|
ILcdGXYPainterStyle |
getFontStyle()
Returns the font style that is used when painting text objects.
|
ILcdGXYEditor |
getGXYEditor(Object aObject)
Finds an
ILcdGXYEditor that can be used to edit the object passed. |
ILcdGXYPainter |
getGXYPainter(Object aObject)
Finds an
ILcdGXYPainter that can be used to paint or locate the object passed. |
ILcdIcon |
getIcon()
Returns the icon to use when painting points.
|
ILcdObjectIconProvider |
getIconProvider()
Returns the icon provider to use when painting points.
|
ILcdGXYPainterStyle |
getLineStyle()
Returns the style for the outline of shapes.
|
int |
getMode()
Returns the mode used to decide how to paint an object.
|
Object |
getObject()
Returns the Object for which the representation is currently being handled by this painter.
|
boolean |
getPaintCache()
Returns whether the world representation of the shapes are cached if possible.
|
double |
getRoundness()
Returns the roundness factor that is used to render corners of polygons or polylines.
|
double |
getScale()
Returns the current size factor.
|
TLcdGXYIconPainter.ScalingMode |
getScalingMode()
Returns the current icon scaling mode.
|
ILcdIcon |
getSelectedIcon()
Returns the icon to use when painting selected points.
|
ILcdObjectIconProvider |
getSelectedIconProvider()
Returns the icon provider to use when painting selected points.
|
int |
getSelectionMode()
Returns how shapes are painted when selected.
|
ILcdIcon |
getSnapIcon()
Returns the snapping icon.
|
boolean |
isAntiAliased()
Returns if anti-aliasing is enabled.
|
boolean |
isTouched(Graphics aGraphics,
int aMode,
ILcdGXYContext aGXYContext)
Checks if the representation of the object in the given mode is touched at the location as defined in the
supplied context.
|
void |
paint(Graphics aGraphics,
int aMode,
ILcdGXYContext aGXYContext)
Displays the representation of the object in the given mode on the Graphics passed, taking into account the
supplied context.
|
void |
removePropertyChangeListener(PropertyChangeListener aPropertyChangeListener)
De-registers the given
PropertyChangeListener from receiving property change events
for this object. |
void |
setAntiAliased(boolean aAntiAliased)
Enable or disable anti-aliasing.
|
void |
setEditMode(int aEditModel)
Sets whether to draw shape outlines and/or whether to fill shapes when edited.
|
void |
setFillStyle(ILcdGXYPainterStyle aFillStyle)
Sets the fill style.
|
void |
setFontStyle(ILcdGXYPainterStyle aFontStyle)
Sets the font style that is used when painting text objects.
|
void |
setIcon(ILcdIcon aIcon)
Sets the icon to use when painting points.
|
void |
setIconProvider(ILcdObjectIconProvider aIconProvider)
Sets the icon provider to use when painting points.
|
void |
setLineStyle(ILcdGXYPainterStyle aLineStyle)
Sets the style for the outline of shapes.
|
void |
setMode(int aMode)
Sets the mode to decide how to paint an object.
|
void |
setObject(Object aObject)
Sets the Object for which the representation shall be handled by this painter.
|
void |
setPaintCache(boolean aPaintCache)
Sets whether to cache the world representation of the shapes.
|
void |
setRoundness(double aRoundness)
Sets the roundness factor that should be used to render corners of polygons or polylines.
|
void |
setScale(double aScale)
Sets the new size factor for the icons (Only applicable for points).
|
void |
setScalingMode(TLcdGXYIconPainter.ScalingMode aScalingMode)
Sets the icon scaling mode, which determines how the
setScale(double)
property is interpreted. |
void |
setSelectedIcon(ILcdIcon aIcon)
Sets the icon to use when painting selected points.
|
void |
setSelectedIconProvider(ILcdObjectIconProvider aIconProvider)
Sets the icon provider to use when painting selected points.
|
void |
setSelectionMode(int aSelectionMode)
Sets whether to draw shape outlines and/or whether to fill shapes when selected.
|
void |
setSnapIcon(ILcdIcon aSnapIcon)
Sets the snapping icon.
|
Object |
snapTarget(Graphics aGraphics,
ILcdGXYContext aGXYContext)
Returns an object that can be used as snapping target when graphically editing an object.
|
boolean |
supportSnap(Graphics aGraphics,
ILcdGXYContext aGXYContext)
Returns whether the painter can provide a snap target based on the representation of the object in the given
context.
|
public TLcdGXYShapePainter()
public void setAntiAliased(boolean aAntiAliased)
Enable or disable anti-aliasing. By default, anti-aliasing is enabled.
See also ILcdGXYView.isAntiAliased()
.
aAntiAliased
- true to enable anti-aliasing.isAntiAliased()
public boolean isAntiAliased()
setAntiAliased(boolean)
public ILcdIcon getSnapIcon()
public void setSnapIcon(ILcdIcon aSnapIcon)
aSnapIcon
- the icon to display when close to a target for snapping.public ILcdGXYPainterStyle getLineStyle()
configured
to
draw the outlines of shapes.public void setLineStyle(ILcdGXYPainterStyle aLineStyle)
configured
to
draw the outlines of shapes.aLineStyle
- the style to apply when rendering linespublic ILcdGXYPainterStyle getFillStyle()
configured
to fill areas.public void setFillStyle(ILcdGXYPainterStyle aFillStyle)
configured
to fill areas.aFillStyle
- the style to apply when filling areaspublic double getRoundness()
setRoundness(double)
public void setRoundness(double aRoundness)
aRoundness
- the roundness (or rounding) factor for polygon and polyline corners.IllegalArgumentException
- if aRoundness < 0 || aRoundness > 1.0.public ILcdObjectIconProvider getIconProvider()
public void setIconProvider(ILcdObjectIconProvider aIconProvider)
setIcon
for painting.aIconProvider
- an icon provider.public ILcdIcon getIcon()
public void setIcon(ILcdIcon aIcon)
aIcon
- an iconpublic ILcdObjectIconProvider getSelectedIconProvider()
setSelectedIconProvider(com.luciad.gui.ILcdObjectIconProvider)
public void setSelectedIconProvider(ILcdObjectIconProvider aIconProvider)
setSelectedIcon
for painting.aIconProvider
- an icon provider.getSelectedIconProvider()
public ILcdIcon getSelectedIcon()
public void setSelectedIcon(ILcdIcon aIcon)
aIcon
- an icon.public ILcdGXYPainterStyle getFontStyle()
public void setFontStyle(ILcdGXYPainterStyle aFontStyle)
aFontStyle
- the font style. For example TLcdGXYPainterFontStyle
.public boolean getPaintCache()
public void setPaintCache(boolean aPaintCache)
aPaintCache
- true to use caching where possiblepublic int getMode()
Returns the mode used to decide how to paint an object.
Possible modes are:public void setMode(int aMode)
Sets the mode to decide how to paint an object.
Possible modes are: By default, the mode isOUTLINED_FILLED
.aMode
- the fill/outline modepublic int getSelectionMode()
public void setSelectionMode(int aSelectionMode)
OUTLINED_FILLED
.aSelectionMode
- the fill/outline modepublic int getEditMode()
public void setEditMode(int aEditModel)
OUTLINED_FILLED
.aEditModel
- the fill/outline modepublic void setScalingMode(TLcdGXYIconPainter.ScalingMode aScalingMode)
setScale(double)
property is interpreted. (Only applicable for points).aScalingMode
- the new icon scaling modegetScalingMode()
public TLcdGXYIconPainter.ScalingMode getScalingMode()
setScalingMode(com.luciad.view.gxy.painter.TLcdGXYIconPainter.ScalingMode)
public void setScale(double aScale)
getScalingMode()
.aScale
- the new size factorsetScalingMode(com.luciad.view.gxy.painter.TLcdGXYIconPainter.ScalingMode)
,
getScale()
public double getScale()
setScale(double)
public Object clone()
ILcdGXYPainterProvider
Object.clone
to make it public.clone
in interface ILcdCloneable
clone
in interface ILcdGXYEditorProvider
clone
in interface ILcdGXYPainterProvider
clone
in class Object
Object.clone()
public ILcdGXYPainter getGXYPainter(Object aObject)
ILcdGXYPainter
that can be used to paint or locate the object passed.
The painter provider is responsible for setting the object to the painter before returning the painter. An implementation should therefore have the following structure:
public ILcdGXYPainter getGXYPainter(Object aObject) {
ILcdGXYPainter painter = ... // find the painter for the object
if (painter != null) {
painter.setObject(aObject);
}
return painter;
}
This method checks the type of the given object, and returns a default painter for it. See also the class doc.
getGXYPainter
in interface ILcdGXYPainterProvider
aObject
- the object to find a painter forpublic ILcdGXYEditor getGXYEditor(Object aObject)
ILcdGXYEditor
that can be used to edit the object passed.
The editor provider is responsible for setting the object to the editor before returning the editor. An implementation should therefore have the following structure:
public ILcdGXYEditor getGXYEditor(Object aObject) {
ILcdGXYEditor editor = ... // find the editor for the object
editor.setObject( aObject );
return editor;
}
This method checks the type of the given object, and returns a default editor for it. See also the class doc.
getGXYEditor
in interface ILcdGXYEditorProvider
aObject
- the object to find a painter forpublic boolean edit(Graphics aGraphics, int aMode, ILcdGXYContext aGXYContext)
ILcdGXYEditor
The mode passed indicates how the interaction should be interpreted. It can be one of the following:
TRANSLATED
RESHAPED
START_CREATION
CREATING
END_CREATION
The first two modes designate that the object should be modified, the last three modes are passed
when initializing an object. From an implementation point of view there is no difference between TRANSLATED and
RESHAPED. These constants only differ in semantics. For ILcdShape
objects TRANSLATED can be seen
as the mode that will be passed when the shape as a whole is moved. RESHAPED is used more often for moving part of
a shape.
The context contains information on the user interaction at hand. The methods
getX
and
getY
contain the location(s) of the user interaction. The methods
getDeltaX
and
getDeltaY
contain the distance(s) over which the user interaction is taking place. For example, getX
and
getY
may contain the current mouse location while getDeltaX
and getDeltaY
contain the distance over which the mouse has been dragged. The editing behavior can take into
account multiple locations, to respond to, for example, multi-touch input.
When a snap target is accepted, the implementation of this method should take that fact into account when editing or initializing an object.
edit
in interface ILcdGXYEditor
aGraphics
- the Graphics on which the representation of the object is paintedaMode
- indicates how the user interaction should be interpreted. Is one of the following:
TRANSLATED
,
RESHAPED
,
START_CREATION
,
CREATING
,
END_CREATION
.
aGXYContext
- contains information on the user interaction and
the transformations to transform from view space to the object model space.ILcdGXYContext
,
acceptSnapTarget
public int getCreationClickCount()
ILcdGXYEditor
getCreationClickCount
in interface ILcdGXYEditor
public boolean acceptSnapTarget(Graphics aGraphics, ILcdGXYContext aGXYContext)
ILcdGXYEditor
edit
method with this
context passed should edit the object so that (part of) the object snaps to the object passed
as snap target in the context.
The context contains information on the user interaction at hand: the current location of the
user interaction, given by its
X
and
Y
coordinates, and
the
distance in X direction
and
distance in Y direction
over which the user interaction is taking place.
For example, getX
and
getY
may contain the current mouse location while getDeltaX
and getDeltaY
contain the distance over which the mouse has been dragged.
The context also contains the candidate
snap target
and the
layer the snap target is contained in
.
acceptSnapTarget
in interface ILcdGXYEditor
aGraphics
- the Graphics on which the representation of the object is paintedaGXYContext
- the context containing the information on the user interaction and the snap target.ILcdGXYContext.getSnapTarget()
public void setObject(Object aObject)
ILcdGXYPainter
Setting the object on the painter may have an effect on the internal state of the painter, for example, the color to use.
When the object is set to a painter, the context parameter in subsequent calls to methods in this class must contain a layer that contains this object and for which the painter for this object is this painter.
setObject
in interface ILcdGXYEditor
setObject
in interface ILcdGXYPainter
aObject
- the object for which the representation shall be handled by this painter.ILcdGXYPainter.getObject()
public Object getObject()
ILcdGXYPainter
getObject
in interface ILcdGXYEditor
getObject
in interface ILcdGXYPainter
ILcdGXYPainter.setObject(Object)
public void paint(Graphics aGraphics, int aMode, ILcdGXYContext aGXYContext)
ILcdGXYPainter
The visual representation of an object depends on the context. Depending on the context (e.g. is the location covered by the view), an object may or may not have a representation. The context contains:
The mode passed in this method indicates what part of the object must be painted, whether it should be painted as selected or not, and whether user interaction (via mouse movements) must be taken into account.
When the mode passed contains either TRANSLATING, RESHAPING or CREATING, this method is also responsible for
interpreting interaction on the representation of an object and modifying the representation of the object
accordingly. The painter is not responsible for modifying the object itself, this is done by
a corresponding ILcdGXYEditor
.
Implementations of ILcdGXYPainter
and ILcdGXYEditor
interfaces must be consistent for
an object: the painter must display the result of the user interaction on the object, while the editor is
responsible for modifying the object as a result of the user interaction.
A good practice to ensure a consistent implementation is to implement both the ILcdGXYPainter
and ILcdGXYEditor
interfaces in a single class.
When the mode passed includes SNAPS, the part of the representation which corresponds to the object returned as
snap target by the method snapTarget
must be painted in order to provide the user with a visual indication of the snap target.
The Graphics passed in this method can be different from the Graphics returned by a view due to techniques such as double buffering (as applied in Swing). Basic drawing operations must always be performed on the Graphics passed as an argument in this method.
paint
in interface ILcdGXYPainter
aGraphics
- the Graphics on which the representation of the object is paintedaMode
- the mode the object is represented in (see class documentation).aGXYContext
- the ILcdGXYContext
the drawing depends on.public void boundsSFCT(Graphics aGraphics, int aMode, ILcdGXYContext aGXYContext, ILcd2DEditableBounds aBoundsSFCT) throws TLcdNoBoundsException
ILcdGXYPainter
If this method returns without exception the bounds argument must encompass the representation of the object. A point outside the bounds will not be contained within the painted object.
The bounds returned in this method can be seen as the equivalent in the view space of the bounds in the model
space for ILcdBounded
objects.
boundsSFCT
in interface ILcdGXYPainter
aGraphics
- the Graphics on which the representation of the object is paintedaMode
- the mode the object is represented in (see class documentation). For example, an object may be
represented differently in SELECTED mode compared to DEFAULT mode. The returned bounds of the representation
must take this different representation into account.aGXYContext
- the context for which the representation of the object is painted. It contains amongst others
the transformations from model to world and world to view.aBoundsSFCT
- the bounds that must be adapted to encompass the representation of the object in the given
mode and context. These bounds must not be taken into account when the method has thrown an exception.TLcdNoBoundsException
- if no bounds can be determined for the representation of the object.
This can happen when the object does not have a representation in the given context, for example when it is located
in a part of the world which is not visible in the current view.isTouched
public boolean isTouched(Graphics aGraphics, int aMode, ILcdGXYContext aGXYContext)
ILcdGXYPainter
The location that must be taken into account to check whether the representation is touched can be retrieved from
the context passed with the methods
ILcdGXYContext.getX()
and ILcdGXYContext.getY()
.
If the check is part of an ongoing operation of
user interaction, for example, when the mouse is being dragged, the location of the start of the operation can also
be taken into account using the methods
ILcdGXYContext.getDeltaX()
and ILcdGXYContext.getDeltaY()
.
The context contains the transformations required to convert this location into the equivalent location in
model space. Implementations of this interface usually follow either of the following patterns:
As the mode influences the way an object is represented, it must also be taken into account when checking whether that representation is being touched. When the mode contains CREATING, RESHAPING or TRANSLATING which indicate that the object must be represented in a state for an ongoing operation, the location of the start of the operation may be taken into account as mentioned above. The painting result can take into account multiple locations, to respond to, for example, multi-touch input. When the mode contains SELECTED, the painter should also check if the non-selected representation is touched, since these are always painted on top of each other.
The boundsSFCT
is often used to speed up the performance of this method as a location outside these bounds can never
touch the representation of the object.
Note that this method does not give an indication of what part of the object is touched. It is up to the painter implementations to provide methods to make this distinction. The method does also not indicate what sensitivity must be applied when checking if an object is touched. It is up to the implementation to decide what should be the maximum distance between the location given in the context and the closest relevant point or area of the representation of the object.
isTouched
in interface ILcdGXYPainter
aGraphics
- the Graphics on which the representation of the object is paintedaMode
- the mode the object is represented inaGXYContext
- contains the location of the interaction and the transformations to convert this location into
model coordinatesboundsSFCT
public void anchorPointSFCT(Graphics aGraphics, int aMode, ILcdGXYContext aGXYContext, Point aPointSFCT) throws TLcdNoBoundsException
ILcdGXYPainter
The anchor point is an important point of the representation, typically the point which would be used
when the object would be represented as a single point. The anchor point is mostly used to attach extra information
to the representation of an object, for example, using labels. A typical implementation of this method for painters
which can handle ILcdShape
objects is the location of the focus point of the shape.
anchorPointSFCT
in interface ILcdGXYPainter
aGraphics
- the Graphics on which the representation of the object is paintedaMode
- the mode the object is painted in (see class documentation)aGXYContext
- the context for which the representation of the object is painted. It contains amongst others
the transformations from model to world and world to view.aPointSFCT
- the point that has to be moved to the location of the anchor point of the representation of
the object. This point must not be taken into account when the method has thrown a TLcdNoBoundsException.TLcdNoBoundsException
- if no anchor point can be determined for the representation of the object.
This can be when the object does not have a representation in the given context, for example when it is located in
a part of the world which is not visible in the projection as set in the views world reference.paint
public boolean supportSnap(Graphics aGraphics, ILcdGXYContext aGXYContext)
ILcdGXYPainter
supportSnap
in interface ILcdGXYPainter
aGraphics
- the Graphics on which the representation of the object is paintedaGXYContext
- the context in which this object is represented and in which the editing of an object occurs.public Object snapTarget(Graphics aGraphics, ILcdGXYContext aGXYContext)
ILcdGXYPainter
This method must only be called when supportSnap
returns true for the given context.
snapTarget
in interface ILcdGXYPainter
aGraphics
- the Graphics on which the representation of the object is paintedaGXYContext
- the context in which this object is represented and in which the editing of an object occurs.supportSnap
public Cursor getCursor(Graphics aGraphics, int aMode, ILcdGXYContext aGXYContext)
ILcdGXYPainter
TRANSLATING
, the cursor could be the MOVE cursor.
When no specific cursor is required implementations must return null.getCursor
in interface ILcdGXYPainter
aGraphics
- the Graphics on which the representation of the object is paintedaMode
- the rendering mode to return the cursor for.aGXYContext
- the context in which the rendering occurs.Cursor
to indicate the type of operating
aMode
and aGXYContext
. Returns
null
if no particular Cursor
is required.public String getDisplayName()
ILcdGXYPainter
getDisplayName
in interface ILcdGXYEditor
getDisplayName
in interface ILcdGXYPainter
public void addPropertyChangeListener(PropertyChangeListener aPropertyChangeListener)
ILcdPropertyChangeSource
Registers the given PropertyChangeListener
to be notified when this object's
properties change.
In case you need to register a listener which keeps a reference to an object with a shorter life-time than this change source,
you can use a ALcdWeakPropertyChangeListener
instance as property change listener.
addPropertyChangeListener
in interface ILcdPropertyChangeSource
aPropertyChangeListener
- The listener to be notifiedALcdWeakPropertyChangeListener
,
ILcdPropertyChangeSource.removePropertyChangeListener(java.beans.PropertyChangeListener)
public void removePropertyChangeListener(PropertyChangeListener aPropertyChangeListener)
ILcdPropertyChangeSource
De-registers the given PropertyChangeListener
from receiving property change events
for this object.
If the listener was added more than once, it will be notified one less time after being
removed.
If the listener is null
, or was never added, no exception is thrown and no action is taken.
removePropertyChangeListener
in interface ILcdPropertyChangeSource
aPropertyChangeListener
- the listener that should no longer be notified of changes of
this object's propertiesILcdPropertyChangeSource.addPropertyChangeListener(java.beans.PropertyChangeListener)
public boolean appendAWTPath(ILcdGXYContext aGXYContext, int aRenderMode, ILcdAWTPath aAWTPathSFCT)
ILcdGXYPathPainter
appendAWTPath
in interface ILcdGXYPathPainter
aGXYContext
- the graphics contextaRenderMode
- the rendering modeaAWTPathSFCT
- the path to append topublic boolean appendGeneralPath(ILcdGXYContext aGXYContext, int aRenderMode, ILcdGeneralPath aGeneralPathSFCT)
ILcdGXYPathPainter
appendGeneralPath
in interface ILcdGXYPathPainter
aGXYContext
- the graphics contextaRenderMode
- the rendering modeaGeneralPathSFCT
- the path to append to