MouseWatcher

from panda3d.core import MouseWatcher

class MouseWatcher

Bases:

Bases: DataNode, MouseWatcherBase

This TFormer maintains a list of rectangular regions on the screen that are considered special mouse regions; typically these will be click buttons. When the mouse passes in or out of one of these regions, or when a button is clicked while the mouse is in one of these regions, an event is thrown.

Mouse events may also be suppressed from the rest of the datagraph in these special regions.

This class can also implement a software mouse pointer by automatically generating a transform to apply to a piece of geometry placed under the 2-d scene graph. It will move the geometry around according to the mouse’s known position.

Finally, this class can keep a record of the mouse trail. This is useful if you want to know, not just where the mouse is, but the exact sequence of movements it took to get there. This information is mainly useful for gesture-recognition code. To use trail logging, you need to enable the generation of pointer events in the GraphicsWindowInputDevice and set the trail log duration in the MouseWatcher. Otherwise, the trail log will be empty.

Inheritance diagram

__init__(name: str)

addGroup(group: MouseWatcherGroup) → bool

Adds the indicated group of regions to the set of regions the MouseWatcher will monitor each frame.

Since the MouseWatcher itself inherits from MouseWatcherBase, this operation is normally not necessary–you can simply add the Regions you care about one at a time. Adding a complete group is useful when you may want to explicitly remove the regions as a group later.

Returns true if the group was successfully added, or false if it was already on the list.

clearDisplayRegion(): Removes the display region constraint from the MouseWatcher, and restores it to the default behavior of watching the whole window.

clearGeometry(): Stops the use of the software cursor set up via setGeometry().

clearInactivityTimeout(): Removes the inactivity timeout and restores the MouseWatcher to its default behavior of allowing a key to be held indefinitely.

clearTrailLog(): Clears the mouse trail log. This does not prevent further accumulation of the log given future events.

clearTrailNode(): If you have previously fetched the trail node using getTrailNode(), then the MouseWatcher is continually updating the trail node every frame. Using clearTrailNode() causes the MouseWatcher to forget the trail node and stop updating it.

getButtonDownPattern() → str: Returns the string that indicates how event names are generated when a button is depressed. See setButtonDownPattern().

getButtonRepeatPattern() → str: Returns the string that indicates how event names are names are generated when a button is continuously held and generates keyrepeat “down” events. See setButtonRepeatPattern().

getButtonUpPattern() → str: Returns the string that indicates how event names are generated when a button is released. See setButtonDownPattern().

static getClassType() → TypeHandle

getDisplayRegion() → DisplayRegion: Returns the display region the MouseWatcher is constrained to by setDisplayRegion(), or NULL if it is not constrained.

getEnterPattern() → str: Returns the string that indicates how event names are generated when the mouse enters a region. This is different from within_pattern, in that a mouse is only “entered” in the topmost region at a given time, while it might be “within” multiple nested regions.

getExtraHandler() → EventHandler: As an optimization for the C++ Gui, an extra handler can be registered with a mouseWatcher so that events can be dealt with much sooner.

getFrame() → LVecBase4: Returns the frame of the MouseWatcher. See setFrame().

getGeometry() → PandaNode: Returns the node that has been set as the software mouse pointer, or NULL if no node has been set. See hasGeometry() and setGeometry().

getGroup(n: int) → MouseWatcherGroup: Returns the nth group added to the MouseWatcher via addGroup().

getGroups() → list

getInactivityTimeout() → float: Returns the inactivity timeout that has been set. It is an error to call this if hasInactivityTimeout() returns false.

getInactivityTimeoutEvent() → str: Returns the event string that will be generated when the inactivity timeout counter expires. See setInactivityTimeout().

getLeavePattern() → str: Returns the string that indicates how event names are generated when the mouse leaves a region. This is different from without_pattern, in that a mouse is only “entered” in the topmost region at a given time, while it might be “within” multiple nested regions.

getModifierButtons() → ModifierButtons: Returns the set of buttons that are being monitored as modifier buttons, as well as their current state.

getMouse() → LPoint2: It is only valid to call this if hasMouse() returns true. If so, this returns the current position of the mouse within the window.

getMouseX() → float: It is only valid to call this if hasMouse() returns true. If so, this returns the current X position of the mouse within the window.

getMouseY() → float: It is only valid to call this if hasMouse() returns true. If so, this returns the current Y position of the mouse within the window.

getNumGroups() → int: Returns the number of separate groups added to the MouseWatcher via addGroup().

getOverRegion() → MouseWatcherRegion: Returns the smallest region the mouse is currently over, or NULL if it is over no region.

getOverRegion(pos: LPoint2) → MouseWatcherRegion: Returns the preferred region the mouse is over. In the case of overlapping regions, the region with the largest sort order is preferred; if two regions have the same sort order, then the smaller region is preferred.

getOverRegion(x: float, y: float) → MouseWatcherRegion: Returns the smallest region the indicated point is over, or NULL if it is over no region.

getTrailLog() → PointerEventList

Obtain the mouse trail log. This is a PointerEventList. Does not make a copy, therefore, this PointerEventList will be updated each time process_events gets called.

To use trail logging, you need to enable the generation of pointer events in the GraphicsWindowInputDevice and set the trail log duration in the MouseWatcher. Otherwise, the trail log will be empty.

getTrailNode() → GeomNode

Returns a GeomNode that represents the mouse trail. The intent is that you should reparent this GeomNode to Render2D, and then forget about it. The MouseWatcher will continually update the trail node. There is only one trail node, it does not create a new one each time you call getTrailNode().

This is not a particularly beautiful way to render a mouse trail. It is intended more for debugging purposes than for finished applications. Even so, It is suggested that you might want to apply a line thickness and antialias mode to the line — doing so makes it look a lot better.

getWithinPattern() → str: Returns the string that indicates how event names are generated when the mouse wanders over a region. This is different from enter_pattern, in that a mouse is only “entered” in the topmost region at a given time, while it might be “within” multiple nested regions.

getWithoutPattern() → str: Returns the string that indicates how event names are generated when the mouse wanders out of a region. This is different from leave_pattern, in that a mouse is only “entered” in the topmost region at a given time, while it might be “within” multiple nested regions.

hasDisplayRegion() → bool: Returns true if the MouseWatcher has been constrained to a particular region of the screen via setDisplayRegion(), or false otherwise. If this returns true, getDisplayRegion() may be used to return the particular region.

hasGeometry() → bool: Returns true if a software mouse pointer has been setup via setGeometry(), or false otherwise. See setGeometry().

hasInactivityTimeout() → bool: Returns true if an inactivity timeout has been set, false otherwise.

hasMouse() → bool: Returns true if the mouse is anywhere within the window, false otherwise. Also see isMouseOpen().

isButtonDown(button: ButtonHandle) → bool: Returns true if the indicated button is currently being held down, false otherwise.

isMouseOpen() → bool: Returns true if the mouse is within the window and not over some particular MouseWatcherRegion that is marked to suppress mouse events; that is, that the mouse is in open space within the window.

isOverRegion() → bool: Returns true if the mouse is over any rectangular region, false otherwise.

isOverRegion(pos: LPoint2) → bool: Returns true if the mouse is over any rectangular region, false otherwise.

isOverRegion(x: float, y: float) → bool: Returns true if the mouse is over any rectangular region, false otherwise.

noteActivity(): Can be used in conjunction with the inactivity timeout to inform the MouseWatcher that the user has just performed some action which proves he/she is present. It may be necessary to call this for external events, such as joystick action, that the MouseWatcher might otherwise not know about. This will reset the current inactivity timer. When the inactivity timer reaches the length of time specified by setInactivityTimeout(), with no keyboard or mouse activity and no calls to noteActivity(), then any buttons held will be automatically released.

numTrailRecent() → int: This counter indicates how many events were added to the trail log this frame. The trail log is updated once per frame, during the process_events operation.

removeGroup(group: MouseWatcherGroup) → bool: Removes the indicated group from the set of extra groups associated with the MouseWatcher. Returns true if successful, or false if the group was already removed or was never added via addGroup().

removeRegion(region: MouseWatcherRegion) → bool: Removes the indicated region from the group. Returns true if it was successfully removed, or false if it wasn’t there in the first place.

replaceGroup(old_group: MouseWatcherGroup, new_group: MouseWatcherGroup) → bool

Atomically removes old_group from the MouseWatcher, and replaces it with new_group. Presumably old_group and new_group might have some regions in common; these are handled properly.

If old_group is not already present, simply adds new_group and returns false. Otherwise, removes old_group and adds new_group, and then returns true.

setButtonDownPattern(pattern: str)

Sets the pattern string that indicates how the event names are generated when a button is depressed. This is a string that may contain any of the following:

%r - the name of the region the mouse is over %b - the name of the button pressed.

The event name will be based on the in_pattern string specified here, with all occurrences of the above strings replaced with the corresponding values.

setButtonRepeatPattern(pattern: str)

Sets the pattern string that indicates how the event names are generated when a button is continuously held and generates keyrepeat “down” events. This is a string that may contain any of the following:

%r - the name of the region the mouse is over %b - the name of the button pressed.

The event name will be based on the in_pattern string specified here, with all occurrences of the above strings replaced with the corresponding values.

setButtonUpPattern(pattern: str): Sets the pattern string that indicates how the event names are generated when a button is released. See setButtonDownPattern().

setDisplayRegion(dr: DisplayRegion)

Constrains the MouseWatcher to watching the mouse within a particular indicated region of the screen. DataNodes parented under the MouseWatcher will observe the mouse and keyboard events only when the mouse is within the indicated region, and the observed range will be from -1 .. 1 across the region.

Do not delete the DisplayRegion while it is owned by the MouseWatcher.

setEnterPattern(pattern: str): Sets the pattern string that indicates how the event names are generated when the mouse enters a region. This is different from within_pattern, in that a mouse is only “entered” in the topmost region at a given time, while it might be “within” multiple nested regions.

setExtraHandler(eh: EventHandler): As an optimization for the C++ Gui, an extra handler can be registered with a mouseWatcher so that events can be dealt with much sooner.

setFrame(frame: LVecBase4)

Sets the frame of the MouseWatcher. This determines the coordinate space in which the MouseWatcherRegions should be expected to live. Normally, this is left at -1, 1, -1, 1, which is the default setting, and matches the mouse coordinate range.

Whatever values you specify here indicate the shape of the full screen, and the MouseWatcherRegions will be given in coordinate space matching it. For instance, if you specify (0, 1, 0, 1), then a MouseWatcherRegion with the frame (0, 1, 0, .5) will cover the lower half of the screen.

setFrame(left: float, right: float, bottom: float, top: float): Sets the frame of the MouseWatcher. See the next flavor of this method for a more verbose explanation.

setGeometry(node: PandaNode): Sets the node that will be transformed each frame by the mouse’s coordinates. It will also be hidden when the mouse goes outside the window. This can be used to implement a software mouse pointer for when a hardware (or system) mouse pointer is unavailable.

setInactivityTimeout(timeout: float)

Sets an inactivity timeout on the mouse activity. When this timeout (in seconds) is exceeded with no keyboard or mouse activity, all currently-held buttons are automatically released. This is intended to help protect against people who inadvertently (or intentionally) leave a keyboard key stuck down and then wander away from the keyboard.

Also, when this timeout expires, the event specified by setInactivityTimeoutEvent() will be generated.

setInactivityTimeoutEvent(event: str): Specifies the event string that will be generated when the inactivity timeout counter expires. See setInactivityTimeout().

setLeavePattern(pattern: str): Sets the pattern string that indicates how the event names are generated when the mouse leaves a region. This is different from without_pattern, in that a mouse is only “entered” in the topmost region at a given time, while it might be “within” multiple nested regions.

setModifierButtons(mods: ModifierButtons): Sets the buttons that should be monitored as modifier buttons for generating events to the MouseWatcherRegions.

setTrailLogDuration(duration: float): If the duration is nonzero, causes the MouseWatcher to log the mouse’s trail. Events older than the specified duration are discarded. If the duration is zero, logging is disabled.

setWithinPattern(pattern: str): Sets the pattern string that indicates how the event names are generated when the mouse wanders over a region. This is different from enter_pattern, in that a mouse is only “entered” in the topmost region at a given time, while it might be “within” multiple nested regions.

setWithoutPattern(pattern: str): Sets the pattern string that indicates how the event names are generated when the mouse wanders out of a region. This is different from leave_pattern, in that a mouse is only “entered” in the topmost region at a given time, while it might be “within” multiple nested regions.