org.gnu.gtk
public class Widget extends GtkObject
Constructor Summary | |
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Widget(Handle handle)
Create a new Widget with a handle to a native resource returned from a
call to the native libraries.
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Method Summary | |
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boolean | activate()
For widgets that can be activated (buttons, menu items, etc.) this method
activiates them. |
void | addAccelerator(AccelGroup group, int accelKey, ModifierType accelMods, AccelFlags accelFlags) |
void | addEvents(EventMask events)
Adds the events in the bitfield events to the event mask for widget. |
void | addListener(LifeCycleListener listener)
Register an object to receive life cycle event notification.
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void | addListener(FocusListener listener)
Register an object to receive focus event notification.
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void | addListener(ConfigureListener listener)
Register an object to receive configure event notification.
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void | addListener(KeyListener listener)
Register an object to receive key event notification.
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void | addListener(MouseListener listener)
Register an object to receive mouse event notification.
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void | addListener(DragDestinationListener listener)
Register an object to receive drag drop (destination) events.
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void | addListener(DragTargetListener listener) |
void | addListener(DragSourceListener listener)
Register an object to receive drag source events.
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void | addListener(DragOriginListener listener) |
void | addListener(ExposeListener listener)
Register an object to receive expose event notification.
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void | addListener(MouseMotionListener listener)
Register an object to receive mouse motion event notification.
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boolean | canActivateAccel(int signalId) |
Context | createContext()
Creates a new Context with the appropriate Colormap, FontDescription, and
base direction for drawing text for this widget.
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Layout | createLayout(String text)
Creates a new Layout with the appropriate Colormap, FontDescription and
base direction for drawing text for this widget.
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void | draw()
Causes the entire widget to be redrawn. |
void | drawArea(Rectangle area)
Causes the specified area to be redrawn.
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void | drawArea(int x, int y, int width, int height)
Causes the specified area to be redrawn
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static void | finish(DragContext context, boolean success, boolean delete) |
AtkObject | getAccessible()
Returns the accessible object associated with this widget.
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Allocation | getAllocation() |
boolean | getCanFocus()
Find out the current value of the "can-focus" property
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Colormap | getColormap()
Returns the Colormap that will be used to render this widget.
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Context | getContext()
Gets a Context with the appropriate Colormap, FontDescription and base
direction for this widget. |
static void | getData(Widget widget, DragContext context, Atom target) |
Display | getDisplay() |
void | getDragData(DragContext context, Atom target, int time) |
Class | getEventListenerClass(String signal) |
EventType | getEventType(String signal) |
ExtensionMode | getExtensionEvents()
Retrieves the extension events the widget will receive.
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RcStyle | getModifierStyle()
Retruns the Widget's {@link RcStyle}.
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String | getName()
Returns the name for the widget.
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Widget | getParent()
Returns the parent container for this widget
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Window | getParentWindow()
Returns the widget's parent window.
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Point | getPointer()
Returns the location of the mouse pointer in widget coordinates. |
Window | getRootWindow()
Get the root window where this widget is located. |
Screen | getScreen() |
boolean | getSensitive()
Gets the sensitivity of the widget. |
Style | getStyle()
Returns the Widgets {@link Style}.
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Widget | getToplevel()
Returns the topmost widget in the container hierarchy.
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static Type | getType()
Retrieve the runtime type used by the GLib library. |
static Widget | getWidget(Handle handle)
Creates a new Widget with a handle to a native resource returned from a
call to the native libraries. |
Window | getWindow()
Return the widget's Gdk window, if it has one. |
void | grabDefault()
Causes the widget to become the default widget. |
void | grabFocus()
Causes the widget to gain focus within its' TOPLEVEL. |
boolean | hasFocus()
Determines if the widget has focus within its' TOPLEVEL.
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boolean | hasScreen() |
void | hide()
Cause this Widget to not be visible. |
void | hideAll()
Cause this Widget and all of its' children to not be visible. |
static void | highlight(Widget widget) |
void | highlight() |
Rectangle | intersect(Rectangle area)
Computes the intersection of the widget's area and area .
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boolean | isAncestor(Widget ancestor)
Determines whether this widget is somewhere inside of ancestor.
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static Widget | makeWidget(Handle handle)
Create a Java-GNOME Widget subclass from an existing native GTK+ handle.
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void | modifyStyle(RcStyle style)
Modifies style values on the Widget. |
void | popColormap()
Pops the top colormap off of the stack of colormaps. |
void | pushColormap(Colormap colormap)
Pushes a Colormap onto the stack of colormaps. |
void | realize()
Creates a native window resource associated with this widget. |
boolean | removeAccelerator(AccelGroup group, int accelKey, ModifierType accelMods) |
void | removeListener(LifeCycleListener listener)
Unregister an object that was receiving life cycle event notification.
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void | removeListener(FocusListener listener)
Unregister an object that was receiving focus event notification.
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void | removeListener(ConfigureListener listener)
Unregister an object that was receiving configure event notification.
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void | removeListener(KeyListener listener)
Unregister an object that was receiving key event notification.
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void | removeListener(MouseListener listener)
Unregister an object that was receiving mouse event notification.
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void | removeListener(DragDestinationListener listener)
Unregister an object that was receiving dragDestination event
notification.
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void | removeListener(DragTargetListener listener) |
void | removeListener(DragSourceListener listener)
Unregister an object that was receiving drag source event notification.
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void | removeListener(DragOriginListener listener) |
void | removeListener(ExposeListener listener)
Unregister an object that was receiving expose event notification.
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void | removeListener(MouseMotionListener listener)
Unregister an object that was receiving mouse motion event notification.
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void | reparent(Widget newParent)
Moves a widget from one Container to another.
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void | setBackgroundColor(StateType state, Color color)
Sets the background color for a widget in a particular state. |
void | setBaseColor(StateType state, Color color)
Sets the base color used for a widget in a particular state. |
void | setCanFocus(boolean canFocus)
Tell this Widget whether or not it is allowed to accept focus. |
void | setColormap(Colormap colormap)
Set the Colormap that will be used to render this widget.
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void | setDoubleBuffered(boolean doubleBuffered)
Enables/Disables double buffering for this widget. |
void | setDragDestination(DestDefaults flags, TargetEntry[] targets, DragAction actions)
Sets up the widget so that is can receive drops as part of drag drop
events and specifies what sort of drops it will accept
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void | setDragIcon(Widget widget, Colormap cmap, Pixmap pixmap, Bitmap mask) |
void | setDragIconPixbuf(Widget widget, Pixbuf pixbuf) |
void | setDragIconStock(Widget widget, String stockId) |
void | setDragSource(ModifierType buttons, TargetEntry[] targets, DragAction actions)
Sets up the widget so that it can be the source of drag and drop
operations.
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void | setEvents(EventMask events)
Sets the event mask for a widget. |
void | setExtensionEvents(ExtensionMode mode)
Sets the extension events mask to mode.
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void | setFont(FontDescription fontDesc)
Sets the font to use for the widget.
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void | setForegroundColor(StateType state, Color color)
Sets the foreground color for a widget in a particular state. |
void | setMinimumSize(int width, int height)
Sets the minimum size of a widget. |
void | setName(String name)
Sets the name for this widget. |
void | setNoDragDestination()
Removes support for this widget being a drag and drop target |
void | setNoDragSource()
Removes support for this widget being a drag and drop source. |
void | setSensitive(boolean sensitive)
Sets the sensitivity of a widget. |
void | setTextColor(StateType state, Color color)
Sets the text color for a widget in a particular state. |
void | shapeCombineMask(Bitmap shapeMask, int x, int y)
Sets the shape of this widgets OS window. |
void | show()
Cause this Widget to be visible. |
void | showAll()
Cause this Widget and all of its' children to be visible. |
static void | unHighlight(Widget widget) |
void | unHighlight() |
Parameters: handle The handle that represents a pointer to a native resource.
Returns: False if this widget is not activatable.
Parameters: events
Parameters: listener The object that has implemented the LifeCycleListener interface that is to receive the life cycle events.
Parameters: listener The object that has implemented the FocusListener interface that is to receive the focus events.
Parameters: listener The object that has implemented the ConfigureListener interface that is to receive the configure events.
An important thing to notice is that some widgets don't receive
low-level events (such as a key-press event) by default. So if
you want to capture events from them, you should add them to an
EventBox
, and capture events on the EventBox
.
The reason why this happens is that some widgets, for efficiency, don't have their own X window, which is necessary to receive events. These are the widgets that don't have their own X window:
Alignment
Arrow
Bin
Box
Image
Item
Label
Pixmap
ScrolledWindow
Separator
Table
AspectFrame
Frame
VBox
HBox
VSeparator
HSeparator
Parameters: listener The object that has implemented the KeyListener interface that is to receive the key events.
An important thing to notice is that some widgets don't receive
low-level events (such as a mouse-click event) by default. So if
you want to capture events from them, you should add them to an
EventBox
, and capture events on the EventBox
.
The reason why this happens is that some widgets, for efficiency, don't have their own X window, which is necessary to receive events. These are the widgets that don't have their own X window:
Alignment
Arrow
Bin
Box
Image
Item
Label
Pixmap
ScrolledWindow
Separator
Table
AspectFrame
Frame
VBox
HBox
VSeparator
HSeparator
Parameters: listener The object that has implemented the MouseListener interface that is to receive the mouse events.
Deprecated: Use {@link #addListener(DragTargetListener)} instead.
Register an object to receive drag drop (destination) events.Parameters: listener The object that has implemented the DragDestinationListener interface
Deprecated: Use {@link #addListener(DragOriginListener)} instead.
Register an object to receive drag source events.Parameters: listener The object that has implemented the DragSourceListener interface
Parameters: listener The object that has implemented the ExposeListener interface that is to receive the expose events.
An important thing to notice is that some widgets don't receive
low-level events (such as a mouse-enter event) by default. So if
you want to capture events from them, you should add them to an
EventBox
, and capture events on the EventBox
.
The reason why this happens is that some widgets, for efficiency, don't have their own X window, which is necessary to receive events. These are the widgets that don't have their own X window:
Alignment
Arrow
Bin
Box
Image
Item
Label
Pixmap
ScrolledWindow
Separator
Table
AspectFrame
Frame
VBox
HBox
VSeparator
HSeparator
Parameters: listener The object that has implemented the MouseMotionListener interface that is to receive the mouse motion events.
Returns: A context that can be used for drawig text.
Parameters: text The text used for the layout.
Returns: The layout that can be used for drawing text.
Parameters: area The area to be redrawn.
Parameters: x The x coordinate for the area to be redrawn. y The y coordinate for the area to be redrawn. width The width of the area to be redrawn. height The height of the area to be redrawn.
Deprecated: Use {@link DragContext#finish(boolean, boolean, int)}
Returns: The AtkObject.
Since: 2.8.5
See Also: Widget
Returns: The colormap used for this widget.
Returns: A context that can be used for drawing text.
Deprecated: Use {@link #getDragData(DragContext, Atom, int)}
Returns: extension events for this widget.
Returns: The current RcStyle for the Widget.
Returns: The name for the widget.
Returns: The parent container for this widget.
Returns: Returns the widget's parent window.
Returns: The location of the mouse or null
Returns: the Gdk Window backing the root of this particular Widget's hierarchy.
Returns: true if the widget is sensitive, false otherwise.
Returns: The current Style for the Widget.
Returns: The topmost widget.
Parameters: handle The handle that represents a pointer to a native resource.
Returns: the widget's Gdk Window, or null if a) it hasn't been mapped yet or b) it is of a type that doesn't have a Gdk Window.
See Also: if you want to be sure of getting to a Gdk
Window.
for more about custom Widgets.
Returns: true if the widget has focus.
Deprecated: Use {@link #highlight()}.
area
.
Parameters: area The area to use to compute the intersection.
Returns: The intersection. If the areas don't intersect this method returns null.
Parameters: ancestor The possible parent widget
Parameters: handle The handle that represents a pointer to a native resource.
Throws: ClassNotFoundException if a Java-GNOME class cannot be found for the specified handle.
Parameters: style The style to apply to the Widget
Parameters: colormap The Colormap to push onto the stack.
Parameters: listener The object that is to no longer receive life cycle events.
Parameters: listener The object that is to no longer receive focus events.
Parameters: listener The object that is to no longer receive configure events.
Parameters: listener The object that is to no longer receive key events.
Parameters: listener The object that is to no longer receive mouse events.
Deprecated: Use {@link #removeListener(DragTargetListener)} instead.
Unregister an object that was receiving dragDestination event notification.Parameters: listener The object that is to no longer receive dragDestination events
Deprecated: Use {@link #removeListener(DragOriginListener)}
Unregister an object that was receiving drag source event notification.Parameters: listener The object that is to no longer receive drag source events
Parameters: listener The object that is to no longer receive expose events.
Parameters: listener The object that is to no longer receive mouse motion events.
Parameters: newParent The widget that will be the new parent.
Note that some widgets draw on their parent container's window and thus may not draw any background themselves. This is the case for e.g. {@link Label}. To modify the background of such widgets, you have to set the background color on their parent; if you want to set the background of a rectangular area around a label, try placing the label in an {@link EventBox} widget and setting the background color on that
Parameters: state The widget state to modify. color The color to set the background.
Parameters: state The widget state to modify. color The color to set.
Parameters: canFocus
Since: 2.8.5
Parameters: colormap The colormap to be used.
Parameters: doubleBuffered Set if the widget should be double buffered.
Parameters: flags
Parameters: buttons Buttons which can start the drag targets An array of names of drag and drop operations accepted (these are made up by the application designers. Widgets must set as drag sources and destinations with one of these the same) actions Drag action - determines which events will be called.
Parameters: events
Parameters: mode extension events to receive.
Parameters: fontDesc The font description to use.
Parameters: state The widget state to modify. color The color to set the foreground.
In most cases Window.setDefaultSize()
is a better choice
for toplevel windows than this method. Setting the default size will
still allow users to shrink the window. Setting the minimum size will
force them to leave the window at least as large as the request.
Note the inherent danger of setting any fixed size - themes, translations into other languages, different fonts, and user action can change the appropriate size for a given widget. So, it's basically impossible to hardcode a size that will always be correct.
If the minimum size in a given direction is -1 then the "natural" size for the widget will be used instead.
Parameters: width The minimum width size to use. height The minimum height size to use.
Parameters: name The name for the widget.
Parameters: sensitive true to make the widget sensitive.
Note that some widgets draw on their parent container's window and thus may not draw any background themselves. This is the case for e.g. {@link Label}. To modify the background of such widgets, you have to set the background color on their parent; if you want to set the background of a rectangular area around a label, try placing the label in an {@link EventBox} widget and setting the background color on that
Parameters: state The widget state to modify. color The color to set the text.
Parameters: shapeMask Shape to be added or null to remove an existing shape. x X Position of the shape mask with respect to the window. y Y Position of the shape mask with respect to the window.
Deprecated: Use {@link #unHighlight()}.