d13d99aa85
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@10012 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
392 lines
12 KiB
TeX
392 lines
12 KiB
TeX
\section{\class{wxMouseEvent}}\label{wxmouseevent}
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This event class contains information about mouse events.
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See \helpref{wxWindow::OnMouseEvent}{wxwindowonmouseevent}.
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{\bf NB: } Note that under Windows mouse enter and leave events are not natively supported
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by the system but are generated by wxWindows itself. This has several
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drawbacks: the LEAVE\_WINDOW event might be received some time after the mouse
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left the window and the state variables for it may have changed during this
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time.
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{\bf NB: } Note the difference between methods like
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\helpref{LeftDown}{wxmouseeventleftdown} and
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\helpref{LeftIsDown}{wxmouseeventleftisdown}: the formet returns {\tt TRUE}
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when the event corresponds to the left mouse button click while the latter
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returns {\tt TRUE} if the left mouse button is currently being pressed. For
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example, when the user is dragging the mouse you can use
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\helpref{LeftIsDown}{wxmouseeventleftisdown} to test
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whether the left mouse button is (still) depressed. Also, by convention, if
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\helpref{LeftDown}{wxmouseeventleftdown} returns {\tt TRUE},
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\helpref{LeftIsDown}{wxmouseeventleftisdown} will also return {\tt TRUE} in
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wxWindows whatever the underlying GUI behaviour is (which is
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platform-dependent). The same applies, of course, to other mouse buttons as
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well.
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\wxheading{Derived from}
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\helpref{wxEvent}{wxevent}
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\wxheading{Include files}
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<wx/event.h>
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\wxheading{Event table macros}
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To process a mouse event, use these event handler macros to direct input to member
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functions that take a wxMouseEvent argument.
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\twocolwidtha{7cm}
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\begin{twocollist}\itemsep=0pt
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\twocolitem{{\bf EVT\_LEFT\_DOWN(func)}}{Process a wxEVT\_LEFT\_DOWN event.}
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\twocolitem{{\bf EVT\_LEFT\_UP(func)}}{Process a wxEVT\_LEFT\_UP event.}
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\twocolitem{{\bf EVT\_LEFT\_DCLICK(func)}}{Process a wxEVT\_LEFT\_DCLICK event.}
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\twocolitem{{\bf EVT\_MIDDLE\_DOWN(func)}}{Process a wxEVT\_MIDDLE\_DOWN event.}
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\twocolitem{{\bf EVT\_MIDDLE\_UP(func)}}{Process a wxEVT\_MIDDLE\_UP event.}
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\twocolitem{{\bf EVT\_MIDDLE\_DCLICK(func)}}{Process a wxEVT\_MIDDLE\_DCLICK event.}
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\twocolitem{{\bf EVT\_RIGHT\_DOWN(func)}}{Process a wxEVT\_RIGHT\_DOWN event.}
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\twocolitem{{\bf EVT\_RIGHT\_UP(func)}}{Process a wxEVT\_RIGHT\_UP event.}
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\twocolitem{{\bf EVT\_RIGHT\_DCLICK(func)}}{Process a wxEVT\_RIGHT\_DCLICK event.}
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\twocolitem{{\bf EVT\_MOTION(func)}}{Process a wxEVT\_MOTION event.}
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\twocolitem{{\bf EVT\_ENTER\_WINDOW(func)}}{Process a wxEVT\_ENTER\_WINDOW event.}
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\twocolitem{{\bf EVT\_LEAVE\_WINDOW(func)}}{Process a wxEVT\_LEAVE\_WINDOW event.}
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\twocolitem{{\bf EVT\_MOUSEWHEEL(func)}}{Process a wxEVT\_MOUSEWHEEL event.}
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\twocolitem{{\bf EVT\_MOUSE\_EVENTS(func)}}{Process all mouse events.}
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\end{twocollist}%
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\latexignore{\rtfignore{\wxheading{Members}}}
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\membersection{wxMouseEvent::m\_altDown}
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\member{bool}{m\_altDown}
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TRUE if the Alt key is pressed down.
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\membersection{wxMouseEvent::m\_controlDown}
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\member{bool}{m\_controlDown}
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TRUE if control key is pressed down.
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\membersection{wxMouseEvent::m\_leftDown}
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\member{bool}{m\_leftDown}
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TRUE if the left mouse button is currently pressed down.
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\membersection{wxMouseEvent::m\_middleDown}
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\member{bool}{m\_middleDown}
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TRUE if the middle mouse button is currently pressed down.
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\membersection{wxMouseEvent::m\_rightDown}
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\member{bool}{m\_rightDown}
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TRUE if the right mouse button is currently pressed down.
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\membersection{wxMouseEvent::m\_metaDown}
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\member{bool}{m\_metaDown}
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TRUE if the Meta key is pressed down.
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\membersection{wxMouseEvent::m\_shiftDown}
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\member{bool}{m\_shiftDown}
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TRUE if shift is pressed down.
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\membersection{wxMouseEvent::m\_x}
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\member{long}{m\_x}
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X-coordinate of the event.
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\membersection{wxMouseEvent::m\_y}
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\member{long}{m\_y}
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Y-coordinate of the event.
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\membersection{wxMouseEvent::m\_wheelRotation}
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\member{int}{m\_wheelRotation}
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The distance the mouse wheel is rotated.
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\membersection{wxMouseEvent::m\_wheelDelta}
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\member{int}{m\_wheelDelta}
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The wheel delta, normally 120.
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\membersection{wxMouseEvent::m\_linesPerAction}
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\member{int}{m\_linesPerAction}
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The configured number of lines (or whatever) to be scrolled per wheel
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action.
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\membersection{wxMouseEvent::wxMouseEvent}
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\func{}{wxMouseEvent}{\param{WXTYPE}{ mouseEventType = 0}, \param{int}{ id = 0}}
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Constructor. Valid event types are:
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\begin{itemize}
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\itemsep=0pt
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\item {\bf wxEVT\_ENTER\_WINDOW}
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\item {\bf wxEVT\_LEAVE\_WINDOW}
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\item {\bf wxEVT\_LEFT\_DOWN}
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\item {\bf wxEVT\_LEFT\_UP}
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\item {\bf wxEVT\_LEFT\_DCLICK}
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\item {\bf wxEVT\_MIDDLE\_DOWN}
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\item {\bf wxEVT\_MIDDLE\_UP}
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\item {\bf wxEVT\_MIDDLE\_DCLICK}
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\item {\bf wxEVT\_RIGHT\_DOWN}
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\item {\bf wxEVT\_RIGHT\_UP}
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\item {\bf wxEVT\_RIGHT\_DCLICK}
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\item {\bf wxEVT\_MOTION}
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\item {\bf wxEVT\_MOUSEWHEEL}
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\end{itemize}
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\membersection{wxMouseEvent::AltDown}
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\func{bool}{AltDown}{\void}
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Returns TRUE if the Alt key was down at the time of the event.
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\membersection{wxMouseEvent::Button}
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\func{bool}{Button}{\param{int}{ button}}
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Returns TRUE if the identified mouse button is changing state. Valid
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values of {\it button} are 1, 2 or 3 for left, middle and right
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buttons respectively.
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Not all mice have middle buttons so a portable application should avoid
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this one.
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\membersection{wxMouseEvent::ButtonDClick}\label{buttondclick}
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\func{bool}{ButtonDClick}{\param{int}{ but = -1}}
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If the argument is omitted, this returns TRUE if the event was a mouse
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double click event. Otherwise the argument specifies which double click event
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was generated (1, 2 or 3 for left, middle and right buttons respectively).
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\membersection{wxMouseEvent::ButtonDown}
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\func{bool}{ButtonDown}{\param{int}{ but = -1}}
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If the argument is omitted, this returns TRUE if the event was a mouse
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button down event. Otherwise the argument specifies which button-down event
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was generated (1, 2 or 3 for left, middle and right buttons respectively).
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\membersection{wxMouseEvent::ButtonUp}
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\func{bool}{ButtonUp}{\param{int}{ but = -1}}
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If the argument is omitted, this returns TRUE if the event was a mouse
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button up event. Otherwise the argument specifies which button-up event
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was generated (1, 2 or 3 for left, middle and right buttons respectively).
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\membersection{wxMouseEvent::ControlDown}
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\func{bool}{ControlDown}{\void}
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Returns TRUE if the control key was down at the time of the event.
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\membersection{wxMouseEvent::Dragging}
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\func{bool}{Dragging}{\void}
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Returns TRUE if this was a dragging event (motion while a button is depressed).
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\membersection{wxMouseEvent::Entering}\label{wxmouseevententering}
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\func{bool}{Entering}{\void}
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Returns TRUE if the mouse was entering the window.
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See also \helpref{wxMouseEvent::Leaving}{wxmouseeventleaving}.
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\membersection{wxMouseEvent::GetPosition}\label{wxmouseeventgetposition}
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\constfunc{wxPoint}{GetPosition}{\void}
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\constfunc{void}{GetPosition}{\param{wxCoord*}{ x}, \param{wxCoord*}{ y}}
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\constfunc{void}{GetPosition}{\param{long*}{ x}, \param{long*}{ y}}
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Sets *x and *y to the position at which the event occurred.
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Returns the physical mouse position in pixels.
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\membersection{wxMouseEvent::GetLogicalPosition}\label{wxmouseeventgetlogicalposition}
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\constfunc{wxPoint}{GetLogicalPosition}{\param{const wxDC\&}{ dc}}
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Returns the logical mouse position in pixels (i.e. translated according to the
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translation set for the DC, which usually indicates that the window has been scrolled).
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\membersection{wxMouseEvent::GetLinesPerAction}\label{wxmouseeventgetlinesperaction}
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\constfunc{int}{GetLinesPerAction}{\void}
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Returns the configured number of lines (or whatever) to be scrolled per
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wheel action. Defaults to three.
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\membersection{wxMouseEvent::GetWheelRotation}\label{wxmouseeventgetwheelrotation}
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\constfunc{int}{GetWheelRotation}{\void}
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Get wheel rotation, positive or negative indicates direction of
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rotation. Current devices all send an event when rotation is equal to
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+/-WheelDelta, but this allows for finer resolution devices to be
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created in the future. Because of this you shouldn't assume that one
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event is equal to 1 line or whatever, but you should be able to either
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do partial line scrolling or wait until +/-WheelDelta rotation values
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have been accumulated before scrolling.
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\membersection{wxMouseEvent::GetWheelDelta}\label{wxmouseeventgetwheeldelta}
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\constfunc{int}{GetWheelDelta}{\void}
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Get wheel delta, normally 120. This is the threshold for action to be
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taken, and one such action (for example, scrolling one increment)
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should occur for each delta.
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\membersection{wxMouseEvent::GetX}\label{wxmouseeventgetx}
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\constfunc{long}{GetX}{\void}
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Returns X coordinate of the physical mouse event position.
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\membersection{wxMouseEvent::GetY}\label{wxmouseeventgety}
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\func{long}{GetY}{\void}
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Returns Y coordinate of the physical mouse event position.
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\membersection{wxMouseEvent::IsButton}
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\constfunc{bool}{IsButton}{\void}
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Returns TRUE if the event was a mouse button event (not necessarily a button down event -
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that may be tested using {\it ButtonDown}).
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\membersection{wxMouseEvent::Leaving}\label{wxmouseeventleaving}
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\constfunc{bool}{Leaving}{\void}
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Returns TRUE if the mouse was leaving the window.
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See also \helpref{wxMouseEvent::Entering}{wxmouseevententering}.
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\membersection{wxMouseEvent::LeftDClick}
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\constfunc{bool}{LeftDClick}{\void}
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Returns TRUE if the event was a left double click.
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\membersection{wxMouseEvent::LeftDown}\label{wxmouseeventleftdown}
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\constfunc{bool}{LeftDown}{\void}
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Returns TRUE if the left mouse button changed to down.
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\membersection{wxMouseEvent::LeftIsDown}\label{wxmouseeventleftisdown}
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\constfunc{bool}{LeftIsDown}{\void}
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Returns TRUE if the left mouse button is currently down, independent
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of the current event type.
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Please notice that it is {\bf not} the same as
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\helpref{LeftDown}{wxmouseeventleftdown} which returns TRUE if the left mouse
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button was just pressed. Rather, it describes the state of the mouse button
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before the event happened.
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This event is usually used in the mouse event handlers which process "move
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mouse" messages to determine whether the user is (still) dragging the mouse.
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\membersection{wxMouseEvent::LeftUp}
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\constfunc{bool}{LeftUp}{\void}
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Returns TRUE if the left mouse button changed to up.
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\membersection{wxMouseEvent::MetaDown}
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\constfunc{bool}{MetaDown}{\void}
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Returns TRUE if the Meta key was down at the time of the event.
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\membersection{wxMouseEvent::MiddleDClick}
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\constfunc{bool}{MiddleDClick}{\void}
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Returns TRUE if the event was a middle double click.
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\membersection{wxMouseEvent::MiddleDown}
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\constfunc{bool}{MiddleDown}{\void}
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Returns TRUE if the middle mouse button changed to down.
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\membersection{wxMouseEvent::MiddleIsDown}\label{wxmouseeventmiddleisdown}
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\constfunc{bool}{MiddleIsDown}{\void}
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Returns TRUE if the middle mouse button is currently down, independent
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of the current event type.
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\membersection{wxMouseEvent::MiddleUp}
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\constfunc{bool}{MiddleUp}{\void}
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Returns TRUE if the middle mouse button changed to up.
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\membersection{wxMouseEvent::Moving}
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\constfunc{bool}{Moving}{\void}
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Returns TRUE if this was a motion event (no buttons depressed).
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\membersection{wxMouseEvent::RightDClick}
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\constfunc{bool}{RightDClick}{\void}
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Returns TRUE if the event was a right double click.
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\membersection{wxMouseEvent::RightDown}
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\constfunc{bool}{RightDown}{\void}
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Returns TRUE if the right mouse button changed to down.
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\membersection{wxMouseEvent::RightIsDown}\label{wxmouseeventrightisdown}
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\constfunc{bool}{RightIsDown}{\void}
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Returns TRUE if the right mouse button is currently down, independent
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of the current event type.
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\membersection{wxMouseEvent::RightUp}
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\constfunc{bool}{RightUp}{\void}
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Returns TRUE if the right mouse button changed to up.
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\membersection{wxMouseEvent::ShiftDown}
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\constfunc{bool}{ShiftDown}{\void}
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Returns TRUE if the shift key was down at the time of the event.
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