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NAME
wxMouseEvent - Functions for wxMouseEvent class
DESCRIPTION
This event class contains information about the events generated by the mouse: they
include mouse buttons press and release events and mouse move events.
All mouse events involving the buttons use wxMOUSE_BTN_LEFT for the left mouse button,
wxMOUSE_BTN_MIDDLE for the middle one and wxMOUSE_BTN_RIGHT for the right one. And if the
system supports more buttons, the wxMOUSE_BTN_AUX1 and wxMOUSE_BTN_AUX2 events can also be
generated. Note that not all mice have even a middle button so a portable application
should avoid relying on the events from it (but the right button click can be emulated
using the left mouse button with the control key under Mac platforms with a single button
mouse).
For the wxEVT_ENTER_WINDOW and wxEVT_LEAVE_WINDOW events purposes, the mouse is considered
to be inside the window if it is in the window client area and not inside one of its
children. In other words, the parent window receives wxEVT_LEAVE_WINDOW event not only
when the mouse leaves the window entirely but also when it enters one of its children.
The position associated with a mouse event is expressed in the window coordinates of the
window which generated the event, you can use wxWindow:clientToScreen/3 to convert it to
screen coordinates and possibly call wxWindow:screenToClient/2 next to convert it to
window coordinates of another window.
Note: Note the difference between methods like leftDown/1 and the inherited leftIsDown/1:
the former returns true when the event corresponds to the left mouse button click while
the latter returns true if the left mouse button is currently being pressed. For example,
when the user is dragging the mouse you can use leftIsDown/1 to test whether the left
mouse button is (still) depressed. Also, by convention, if leftDown/1 returns true,
leftIsDown/1 will also return true in wxWidgets whatever the underlying GUI behaviour is
(which is platform-dependent). The same applies, of course, to other mouse buttons as
well.
See: wxKeyEvent
This class is derived (and can use functions) from: wxEvent
wxWidgets docs: wxMouseEvent
EVENTS
Use wxEvtHandler:connect/3 with wxMouseEventType to subscribe to events of this type.
DATA TYPES
wxMouseEvent() = wx:wx_object()
wxMouse() =
#wxMouse{type = wxMouseEvent:wxMouseEventType(),
x = integer(),
y = integer(),
leftDown = boolean(),
middleDown = boolean(),
rightDown = boolean(),
controlDown = boolean(),
shiftDown = boolean(),
altDown = boolean(),
metaDown = boolean(),
wheelRotation = integer(),
wheelDelta = integer(),
linesPerAction = integer()}
wxMouseEventType() =
left_down | left_up | middle_down | middle_up | right_down |
right_up | motion | enter_window | leave_window |
left_dclick | middle_dclick | right_dclick | mousewheel |
aux1_down | aux1_up | aux1_dclick | aux2_down | aux2_up |
aux2_dclick
EXPORTS
altDown(This) -> boolean()
Types:
This = wxMouseEvent()
Returns true if the Alt key is pressed.
Notice that wxKeyEvent:getModifiers/1 should usually be used instead of this one.
button(This, But) -> boolean()
Types:
This = wxMouseEvent()
But = wx:wx_enum()
Returns true if the event was generated by the specified button.
See: wxMouseState::ButtoinIsDown()
buttonDClick(This) -> boolean()
Types:
This = wxMouseEvent()
buttonDClick(This, Options :: [Option]) -> boolean()
Types:
This = wxMouseEvent()
Option = {but, wx:wx_enum()}
If the argument is omitted, this returns true if the event was a mouse double click
event.
Otherwise the argument specifies which double click event was generated (see
button/2 for the possible values).
buttonDown(This) -> boolean()
Types:
This = wxMouseEvent()
buttonDown(This, Options :: [Option]) -> boolean()
Types:
This = wxMouseEvent()
Option = {but, wx:wx_enum()}
If the argument is omitted, this returns true if the event was a mouse button down
event.
Otherwise the argument specifies which button-down event was generated (see
button/2 for the possible values).
buttonUp(This) -> boolean()
Types:
This = wxMouseEvent()
buttonUp(This, Options :: [Option]) -> boolean()
Types:
This = wxMouseEvent()
Option = {but, wx:wx_enum()}
If the argument is omitted, this returns true if the event was a mouse button up
event.
Otherwise the argument specifies which button-up event was generated (see button/2
for the possible values).
cmdDown(This) -> boolean()
Types:
This = wxMouseEvent()
Returns true if the key used for command accelerators is pressed.
Same as controlDown/1. Deprecated.
Notice that wxKeyEvent:getModifiers/1 should usually be used instead of this one.
controlDown(This) -> boolean()
Types:
This = wxMouseEvent()
Returns true if the Control key or Apple/Command key under macOS is pressed.
This function doesn't distinguish between right and left control keys.
Notice that wxKeyEvent:getModifiers/1 should usually be used instead of this one.
dragging(This) -> boolean()
Types:
This = wxMouseEvent()
Returns true if this was a dragging event (motion while a button is depressed).
See: moving/1
entering(This) -> boolean()
Types:
This = wxMouseEvent()
Returns true if the mouse was entering the window.
See: leaving/1
getButton(This) -> integer()
Types:
This = wxMouseEvent()
Returns the mouse button which generated this event or wxMOUSE_BTN_NONE if no
button is involved (for mouse move, enter or leave event, for example).
Otherwise wxMOUSE_BTN_LEFT is returned for the left button down, up and double
click events, wxMOUSE_BTN_MIDDLE and wxMOUSE_BTN_RIGHT for the same events for the
middle and the right buttons respectively.
getPosition(This) -> {X :: integer(), Y :: integer()}
Types:
This = wxMouseEvent()
Returns the physical mouse position.
getLogicalPosition(This, Dc) -> {X :: integer(), Y :: integer()}
Types:
This = wxMouseEvent()
Dc = wxDC:wxDC()
Returns the logical mouse position in pixels (i.e. translated according to the
translation set for the DC, which usually indicates that the window has been
scrolled).
getLinesPerAction(This) -> integer()
Types:
This = wxMouseEvent()
Returns the configured number of lines (or whatever) to be scrolled per wheel
action.
Default value under most platforms is three.
See: GetColumnsPerAction() (not implemented in wx)
getWheelRotation(This) -> integer()
Types:
This = wxMouseEvent()
Get wheel rotation, positive or negative indicates direction of rotation.
Current devices all send an event when rotation is at least +/-WheelDelta, but
finer resolution devices can be created in the future.
Because of this you shouldn't assume that one event is equal to 1 line, but you
should be able to either do partial line scrolling or wait until several events
accumulate before scrolling.
getWheelDelta(This) -> integer()
Types:
This = wxMouseEvent()
Get wheel delta, normally 120.
This is the threshold for action to be taken, and one such action (for example,
scrolling one increment) should occur for each delta.
getX(This) -> integer()
Types:
This = wxMouseEvent()
Returns X coordinate of the physical mouse event position.
getY(This) -> integer()
Types:
This = wxMouseEvent()
Returns Y coordinate of the physical mouse event position.
isButton(This) -> boolean()
Types:
This = wxMouseEvent()
Returns true if the event was a mouse button event (not necessarily a button down
event - that may be tested using buttonDown/2).
isPageScroll(This) -> boolean()
Types:
This = wxMouseEvent()
Returns true if the system has been setup to do page scrolling with the mouse wheel
instead of line scrolling.
leaving(This) -> boolean()
Types:
This = wxMouseEvent()
Returns true if the mouse was leaving the window.
See: entering/1
leftDClick(This) -> boolean()
Types:
This = wxMouseEvent()
Returns true if the event was a left double click.
leftDown(This) -> boolean()
Types:
This = wxMouseEvent()
Returns true if the left mouse button changed to down.
leftIsDown(This) -> boolean()
Types:
This = wxMouseEvent()
Returns true if the left mouse button is currently down.
leftUp(This) -> boolean()
Types:
This = wxMouseEvent()
Returns true if the left mouse button changed to up.
metaDown(This) -> boolean()
Types:
This = wxMouseEvent()
Returns true if the Meta key was down at the time of the event.
middleDClick(This) -> boolean()
Types:
This = wxMouseEvent()
Returns true if the event was a middle double click.
middleDown(This) -> boolean()
Types:
This = wxMouseEvent()
Returns true if the middle mouse button changed to down.
middleIsDown(This) -> boolean()
Types:
This = wxMouseEvent()
Returns true if the middle mouse button is currently down.
middleUp(This) -> boolean()
Types:
This = wxMouseEvent()
Returns true if the middle mouse button changed to up.
moving(This) -> boolean()
Types:
This = wxMouseEvent()
Returns true if this was a motion event and no mouse buttons were pressed.
If any mouse button is held pressed, then this method returns false and dragging/1
returns true.
rightDClick(This) -> boolean()
Types:
This = wxMouseEvent()
Returns true if the event was a right double click.
rightDown(This) -> boolean()
Types:
This = wxMouseEvent()
Returns true if the right mouse button changed to down.
rightIsDown(This) -> boolean()
Types:
This = wxMouseEvent()
Returns true if the right mouse button is currently down.
rightUp(This) -> boolean()
Types:
This = wxMouseEvent()
Returns true if the right mouse button changed to up.
shiftDown(This) -> boolean()
Types:
This = wxMouseEvent()
Returns true if the Shift key is pressed.
This function doesn't distinguish between right and left shift keys.
Notice that wxKeyEvent:getModifiers/1 should usually be used instead of this one.
getWheelAxis(This) -> wx:wx_enum()
Types:
This = wxMouseEvent()
Gets the axis the wheel operation concerns.
Usually the mouse wheel is used to scroll vertically so wxMOUSE_WHEEL_VERTICAL is
returned but some mice (and most trackpads) also allow to use the wheel to scroll
horizontally in which case wxMOUSE_WHEEL_HORIZONTAL is returned.
Notice that before wxWidgets 2.9.4 this method returned int.