7376079d09
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@48101 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
582 lines
18 KiB
TeX
582 lines
18 KiB
TeX
\section{\class{wxMouseEvent}}\label{wxmouseevent}
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This event class contains information about the events generated by the mouse:
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they include mouse buttons press and release events and mouse move events.
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All mouse events involving the buttons use {\tt wxMOUSE\_BTN\_LEFT} for the
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left mouse button, {\tt wxMOUSE\_BTN\_MIDDLE} for the middle one and
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{\tt wxMOUSE\_BTN\_RIGHT} for the right one. And if the system supports more
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buttons, the \texttt{wxMOUSE\_BTN\_AUX1} and \texttt{wxMOUSE\_BTN\_AUX2} events
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can also be generated. Note that not all mice have even a middle button so a
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portable application should avoid relying on the events from it (but the right
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button click can be emulated using the left mouse button with the control key
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under Mac platforms with a single button mouse).
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For the \texttt{wxEVT\_ENTER\_WINDOW} and \texttt{wxEVT\_LEAVE\_WINDOW} events
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purposes, the mouse is considered to be inside the window if it is in the
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window client area and not inside one of its children. In other words, the
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parent window receives \texttt{wxEVT\_LEAVE\_WINDOW} event not only when the
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mouse leaves the window entirely but also when it enters one of its children.
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{\bf NB:} Note that under Windows CE mouse enter and leave events are not natively supported
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by the system but are generated by wxWidgets 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 former 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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wxWidgets 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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\helpref{wxObject}{wxobject}
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\wxheading{Include files}
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<wx/event.h>
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\wxheading{Library}
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\helpref{wxCore}{librarieslist}
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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. The
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handler of this event should normally call \helpref{event.Skip()}{wxeventskip} to
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allow the default processing to take place as otherwise the window under mouse
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wouldn't get the focus.}
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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\_MOUSE\_AUX1\_DOWN(func)}}{Process a wxEVT\_MOUSE\_AUX1\_DOWN event.}
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\twocolitem{{\bf EVT\_MOUSE\_AUX1\_UP(func)}}{Process a wxEVT\_MOUSE\_AUX1\_UP event.}
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\twocolitem{{\bf EVT\_MOUSE\_AUX1\_DCLICK(func)}}{Process a wxEVT\_MOUSE\_AUX1\_DCLICK event.}
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\twocolitem{{\bf EVT\_MOUSE\_AUX2\_DOWN(func)}}{Process a wxEVT\_MOUSE\_AUX2\_DOWN event.}
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\twocolitem{{\bf EVT\_MOUSE\_AUX2\_UP(func)}}{Process a wxEVT\_MOUSE\_AUX2\_UP event.}
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\twocolitem{{\bf EVT\_MOUSE\_AUX2\_DCLICK(func)}}{Process a wxEVT\_MOUSE\_AUX2\_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}\label{wxmouseeventmaltdown}
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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}\label{wxmouseeventmcontroldown}
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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}\label{wxmouseeventmleftdown}
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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}\label{wxmouseeventmmiddledown}
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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}\label{wxmouseeventmrightdown}
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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}\label{wxmouseeventmmetadown}
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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}\label{wxmouseeventmshiftdown}
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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}\label{wxmouseeventmx}
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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}\label{wxmouseeventmy}
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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}\label{wxmouseeventmwheelrotation}
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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}\label{wxmouseeventmwheeldelta}
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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}\label{wxmouseeventmlinesperaction}
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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}\label{wxmouseeventctor}
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\func{}{wxMouseEvent}{\param{WXTYPE}{ mouseEventType = 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\_MOUSE\_AUX1\_DOWN}
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\item {\bf wxEVT\_MOUSE\_AUX1\_UP}
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\item {\bf wxEVT\_MOUSE\_AUX1\_DCLICK}
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\item {\bf wxEVT\_MOUSE\_AUX2\_DOWN}
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\item {\bf wxEVT\_MOUSE\_AUX2\_UP}
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\item {\bf wxEVT\_MOUSE\_AUX2\_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}\label{wxmouseeventaltdown}
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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::Aux1DClick}\label{wxmouseeventaux1dclick}
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\constfunc{bool}{Aux1DClick}{\void}
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Returns true if the event was a first extra button double click.
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\membersection{wxMouseEvent::Aux1Down}\label{wxmouseeventaux1down}
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\constfunc{bool}{Aux1Down}{\void}
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Returns true if the first extra button mouse button changed to down.
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\membersection{wxMouseEvent::Aux1IsDown}\label{wxmouseeventaux1isdown}
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\constfunc{bool}{Aux1IsDown}{\void}
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Returns true if the first extra button mouse button is currently down, independent
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of the current event type.
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\membersection{wxMouseEvent::Aux1Up}\label{wxmouseeventaux1up}
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\constfunc{bool}{Aux1Up}{\void}
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Returns true if the first extra button mouse button changed to up.
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\membersection{wxMouseEvent::Aux2DClick}\label{wxmouseeventaux2dclick}
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\constfunc{bool}{Aux2DClick}{\void}
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Returns true if the event was a second extra button double click.
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\membersection{wxMouseEvent::Aux2Down}\label{wxmouseeventaux2down}
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\constfunc{bool}{Aux2Down}{\void}
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Returns true if the second extra button mouse button changed to down.
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\membersection{wxMouseEvent::Aux2IsDown}\label{wxmouseeventaux2isdown}
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\constfunc{bool}{Aux2IsDown}{\void}
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Returns true if the second extra button mouse button is currently down, independent
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of the current event type.
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\membersection{wxMouseEvent::Aux2Up}\label{wxmouseeventaux2up}
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\constfunc{bool}{Aux2Up}{\void}
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Returns true if the second extra button mouse button changed to up.
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\membersection{wxMouseEvent::Button}\label{wxmouseeventbutton}
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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:
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\begin{twocollist}\itemsep=0pt
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\twocolitem{{\tt wxMOUSE\_BTN\_LEFT}}{check if left button was pressed}
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\twocolitem{{\tt wxMOUSE\_BTN\_MIDDLE}}{check if middle button was pressed}
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\twocolitem{{\tt wxMOUSE\_BTN\_RIGHT}}{check if right button was pressed}
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\twocolitem{{\tt wxMOUSE\_BTN\_AUX1}}{check if the first extra button was pressed}
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\twocolitem{{\tt wxMOUSE\_BTN\_AUX2}}{check if the second extra button was pressed}
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\twocolitem{{\tt wxMOUSE\_BTN\_ANY}}{check if any button was pressed}
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\end{twocollist}
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\membersection{wxMouseEvent::ButtonDClick}\label{wxmouseeventbuttondclick}
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\func{bool}{ButtonDClick}{\param{int}{ but = wxMOUSE\_BTN\_ANY}}
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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 (see \helpref{Button}{wxmouseeventbutton} for the possible
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values).
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\membersection{wxMouseEvent::ButtonDown}\label{wxmouseeventbuttondown}
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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 (see \helpref{Button}{wxmouseeventbutton} for the possible
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values).
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\membersection{wxMouseEvent::ButtonUp}\label{wxmouseeventbuttonup}
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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 (see \helpref{Button}{wxmouseeventbutton} for the possible
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values).
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\membersection{wxMouseEvent::CmdDown}\label{wxmouseeventcmddown}
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\constfunc{bool}{CmdDown}{\void}
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Same as \helpref{MetaDown}{wxmouseeventmetadown} under Mac, same as
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\helpref{ControlDown}{wxmouseeventcontroldown} elsewhere.
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\wxheading{See also}
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\helpref{wxKeyEvent::CmdDown}{wxkeyeventcmddown}
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\membersection{wxMouseEvent::ControlDown}\label{wxmouseeventcontroldown}
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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}\label{wxmouseeventdragging}
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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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\wxheading{See also}
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\helpref{Moving}{wxmouseeventmoving}
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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::GetButton}\label{wxmouseeventgetbutton}
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\constfunc{int}{GetButton}{\void}
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Returns the mouse button which generated this event or {\tt wxMOUSE\_BTN\_NONE}
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if no button is involved (for mouse move, enter or leave event, for example).
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Otherwise {\tt wxMOUSE\_BTN\_LEFT} is returned for the left button down, up and
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double click events, {\tt wxMOUSE\_BTN\_MIDDLE} and {\tt wxMOUSE\_BTN\_RIGHT}
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for the same events for the middle and the right buttons respectively.
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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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Note that if the mouse event has been artificially generated from a special
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keyboard combination (e.g. under Windows when the ``menu'' key is pressed), the
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returned position is \texttt{wxDefaultPosition}.
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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 at least
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+/-WheelDelta, but finer resolution devices can be created in the future.
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Because of this you shouldn't assume that one event is equal to 1 line, but you
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should be able to either do partial line scrolling or wait until several
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events accumulate 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}\label{wxmouseeventisbutton}
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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::IsPageScroll}\label{wxmouseeventispagescroll}
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\constfunc{bool}{IsPageScroll}{\void}
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Returns true if the system has been setup to do page scrolling with
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the mouse wheel instead of line scrolling.
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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}\label{wxmouseeventleftdclick}
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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 \emph{not} the same as
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\helpref{LeftDown}{wxmouseeventleftdown} which returns \true if the event was
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generated by the left mouse button being pressed. Rather, it simply describes
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the state of the left mouse button at the time when the event was generated
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(so while it will be true for a left click event, it can also be true for
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a right click if it happened while the left mouse button was pressed).
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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}\label{wxmouseeventleftup}
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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}\label{wxmouseeventmetadown}
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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}\label{wxmouseeventmiddledclick}
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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}\label{wxmouseeventmiddledown}
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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}\label{wxmouseeventmiddleup}
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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}\label{wxmouseeventmoving}
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\constfunc{bool}{Moving}{\void}
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Returns true if this was a motion event and no mouse buttons were pressed.
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If any mouse button is held pressed, then this method returns \false and
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\helpref{Dragging}{wxmouseeventdragging} returns \true.
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\membersection{wxMouseEvent::RightDClick}\label{wxmouseeventrightdclick}
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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}\label{wxmouseeventrightdown}
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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}\label{wxmouseeventrightup}
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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}\label{wxmouseeventshiftdown}
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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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