X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/5de76427c87d8289f5c343cef16e9375056fc49f..f6ed38239c20927281363f3828323e05b4917c0e:/docs/latex/wx/mouseevt.tex diff --git a/docs/latex/wx/mouseevt.tex b/docs/latex/wx/mouseevt.tex index a116241989..a470265f9a 100644 --- a/docs/latex/wx/mouseevt.tex +++ b/docs/latex/wx/mouseevt.tex @@ -1,12 +1,41 @@ \section{\class{wxMouseEvent}}\label{wxmouseevent} -This event class contains information about mouse events. -See \helpref{wxWindow::OnMouseEvent}{wxwindowonmouseevent}. +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 $1$ for the left mouse button, $2$ +for the middle one and $3$ for the right one. Note that not all mice have +a middle button so a portable application should avoid relying on the events +from it. + +{\bf NB: } Note that under Windows mouse enter and leave events are not natively supported +by the system but are generated by wxWindows itself. This has several +drawbacks: the LEAVE\_WINDOW event might be received some time after the mouse +left the window and the state variables for it may have changed during this +time. + +{\bf NB: } Note the difference between methods like +\helpref{LeftDown}{wxmouseeventleftdown} and +\helpref{LeftIsDown}{wxmouseeventleftisdown}: the formet returns {\tt TRUE} +when the event corresponds to the left mouse button click while the latter +returns {\tt TRUE} if the left mouse button is currently being pressed. For +example, when the user is dragging the mouse you can use +\helpref{LeftIsDown}{wxmouseeventleftisdown} to test +whether the left mouse button is (still) depressed. Also, by convention, if +\helpref{LeftDown}{wxmouseeventleftdown} returns {\tt TRUE}, +\helpref{LeftIsDown}{wxmouseeventleftisdown} will also return {\tt TRUE} in +wxWindows whatever the underlying GUI behaviour is (which is +platform-dependent). The same applies, of course, to other mouse buttons as +well. \wxheading{Derived from} \helpref{wxEvent}{wxevent} +\wxheading{Include files} + + + \wxheading{Event table macros} To process a mouse event, use these event handler macros to direct input to member @@ -26,6 +55,7 @@ functions that take a wxMouseEvent argument. \twocolitem{{\bf EVT\_MOTION(func)}}{Process a wxEVT\_MOTION event.} \twocolitem{{\bf EVT\_ENTER\_WINDOW(func)}}{Process a wxEVT\_ENTER\_WINDOW event.} \twocolitem{{\bf EVT\_LEAVE\_WINDOW(func)}}{Process a wxEVT\_LEAVE\_WINDOW event.} +\twocolitem{{\bf EVT\_MOUSEWHEEL(func)}}{Process a wxEVT\_MOUSEWHEEL event.} \twocolitem{{\bf EVT\_MOUSE\_EVENTS(func)}}{Process all mouse events.} \end{twocollist}% @@ -61,12 +91,6 @@ TRUE if the middle mouse button is currently pressed down. TRUE if the right mouse button is currently pressed down. -\membersection{wxMouseEvent::m\_leftDown} - -\member{bool}{m\_leftDown} - -TRUE if the left mouse button is currently pressed down. - \membersection{wxMouseEvent::m\_metaDown} \member{bool}{m\_metaDown} @@ -81,16 +105,36 @@ TRUE if shift is pressed down. \membersection{wxMouseEvent::m\_x} -\member{float}{m\_x} +\member{long}{m\_x} X-coordinate of the event. \membersection{wxMouseEvent::m\_y} -\member{float}{m\_y} +\member{long}{m\_y} Y-coordinate of the event. +\membersection{wxMouseEvent::m\_wheelRotation} + +\member{int}{m\_wheelRotation} + +The distance the mouse wheel is rotated. + +\membersection{wxMouseEvent::m\_wheelDelta} + +\member{int}{m\_wheelDelta} + +The wheel delta, normally 120. + +\membersection{wxMouseEvent::m\_linesPerAction} + +\member{int}{m\_linesPerAction} + +The configured number of lines (or whatever) to be scrolled per wheel +action. + + \membersection{wxMouseEvent::wxMouseEvent} \func{}{wxMouseEvent}{\param{WXTYPE}{ mouseEventType = 0}, \param{int}{ id = 0}} @@ -111,6 +155,7 @@ Constructor. Valid event types are: \item {\bf wxEVT\_RIGHT\_UP} \item {\bf wxEVT\_RIGHT\_DCLICK} \item {\bf wxEVT\_MOTION} +\item {\bf wxEVT\_MOUSEWHEEL} \end{itemize} \membersection{wxMouseEvent::AltDown} @@ -127,9 +172,6 @@ Returns TRUE if the identified mouse button is changing state. Valid values of {\it button} are 1, 2 or 3 for left, middle and right buttons respectively. -Not all mice have middle buttons so a portable application should avoid -this one. - \membersection{wxMouseEvent::ButtonDClick}\label{buttondclick} \func{bool}{ButtonDClick}{\param{int}{ but = -1}} @@ -170,158 +212,191 @@ Returns TRUE if this was a dragging event (motion while a button is depressed). \func{bool}{Entering}{\void} -Returns TRUE if the mouse was entering the window (MS Windows and Motif). +Returns TRUE if the mouse was entering the window. See also \helpref{wxMouseEvent::Leaving}{wxmouseeventleaving}. +\membersection{wxMouseEvent::GetButton}\label{wxmouseeventgetbutton} + +\constfunc{int}{GetButton}{\void} + +Returns the mouse button which generated this event or $-1$ if no button is +involved (for mouse move, enter or leave event, for example). The value $1$ is +returned for the left button down, up and double click events, $2$ and $3$ for +the same events for the middle and the right buttons respectively. + +\membersection{wxMouseEvent::GetPosition}\label{wxmouseeventgetposition} + +\constfunc{wxPoint}{GetPosition}{\void} + +\constfunc{void}{GetPosition}{\param{wxCoord*}{ x}, \param{wxCoord*}{ y}} + +\constfunc{void}{GetPosition}{\param{long*}{ x}, \param{long*}{ y}} + +Sets *x and *y to the position at which the event occurred. + +Returns the physical mouse position in pixels. + +\membersection{wxMouseEvent::GetLogicalPosition}\label{wxmouseeventgetlogicalposition} + +\constfunc{wxPoint}{GetLogicalPosition}{\param{const wxDC\&}{ dc}} + +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). + + +\membersection{wxMouseEvent::GetLinesPerAction}\label{wxmouseeventgetlinesperaction} + +\constfunc{int}{GetLinesPerAction}{\void} + +Returns the configured number of lines (or whatever) to be scrolled per +wheel action. Defaults to three. + +\membersection{wxMouseEvent::GetWheelRotation}\label{wxmouseeventgetwheelrotation} + +\constfunc{int}{GetWheelRotation}{\void} + +Get wheel rotation, positive or negative indicates direction of +rotation. Current devices all send an event when rotation is equal to ++/-WheelDelta, but this allows for finer resolution devices to be +created in the future. Because of this you shouldn't assume that one +event is equal to 1 line or whatever, but you should be able to either +do partial line scrolling or wait until +/-WheelDelta rotation values +have been accumulated before scrolling. + +\membersection{wxMouseEvent::GetWheelDelta}\label{wxmouseeventgetwheeldelta} + +\constfunc{int}{GetWheelDelta}{\void} + +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. + \membersection{wxMouseEvent::GetX}\label{wxmouseeventgetx} -\func{float}{GetX}{\void} +\constfunc{long}{GetX}{\void} -Returns X coordinate of the mouse event position. +Returns X coordinate of the physical mouse event position. \membersection{wxMouseEvent::GetY}\label{wxmouseeventgety} -\func{float}{GetY}{\void} +\func{long}{GetY}{\void} -Returns Y coordinate of the mouse event position. +Returns Y coordinate of the physical mouse event position. \membersection{wxMouseEvent::IsButton} -\func{bool}{IsButton}{\void} +\constfunc{bool}{IsButton}{\void} Returns TRUE if the event was a mouse button event (not necessarily a button down event - that may be tested using {\it ButtonDown}). \membersection{wxMouseEvent::Leaving}\label{wxmouseeventleaving} -\func{bool}{Leaving}{\void} +\constfunc{bool}{Leaving}{\void} -Returns TRUE if the mouse was leaving the window (MS Windows and Motif). +Returns TRUE if the mouse was leaving the window. See also \helpref{wxMouseEvent::Entering}{wxmouseevententering}. \membersection{wxMouseEvent::LeftDClick} -\func{bool}{LeftDClick}{\void} +\constfunc{bool}{LeftDClick}{\void} Returns TRUE if the event was a left double click. -\membersection{wxMouseEvent::LeftDown} +\membersection{wxMouseEvent::LeftDown}\label{wxmouseeventleftdown} -\func{bool}{LeftDown}{\void} +\constfunc{bool}{LeftDown}{\void} Returns TRUE if the left mouse button changed to down. -\membersection{wxMouseEvent::LeftIsDown} +\membersection{wxMouseEvent::LeftIsDown}\label{wxmouseeventleftisdown} -\func{bool}{LeftIsDown}{\void} +\constfunc{bool}{LeftIsDown}{\void} Returns TRUE if the left mouse button is currently down, independent of the current event type. +Please notice that it is {\bf not} the same as +\helpref{LeftDown}{wxmouseeventleftdown} which returns TRUE if the left mouse +button was just pressed. Rather, it describes the state of the mouse button +before the event happened. + +This event is usually used in the mouse event handlers which process "move +mouse" messages to determine whether the user is (still) dragging the mouse. + \membersection{wxMouseEvent::LeftUp} -\func{bool}{LeftUp}{\void} +\constfunc{bool}{LeftUp}{\void} Returns TRUE if the left mouse button changed to up. \membersection{wxMouseEvent::MetaDown} -\func{bool}{MetaDown}{\void} +\constfunc{bool}{MetaDown}{\void} Returns TRUE if the Meta key was down at the time of the event. \membersection{wxMouseEvent::MiddleDClick} -\func{bool}{MiddleDClick}{\void} +\constfunc{bool}{MiddleDClick}{\void} Returns TRUE if the event was a middle double click. \membersection{wxMouseEvent::MiddleDown} -\func{bool}{MiddleDown}{\void} +\constfunc{bool}{MiddleDown}{\void} Returns TRUE if the middle mouse button changed to down. -\membersection{wxMouseEvent::MiddleIsDown} +\membersection{wxMouseEvent::MiddleIsDown}\label{wxmouseeventmiddleisdown} -\func{bool}{MiddleIsDown}{\void} +\constfunc{bool}{MiddleIsDown}{\void} Returns TRUE if the middle mouse button is currently down, independent of the current event type. \membersection{wxMouseEvent::MiddleUp} -\func{bool}{MiddleUp}{\void} +\constfunc{bool}{MiddleUp}{\void} Returns TRUE if the middle mouse button changed to up. \membersection{wxMouseEvent::Moving} -\func{bool}{Moving}{\void} +\constfunc{bool}{Moving}{\void} Returns TRUE if this was a motion event (no buttons depressed). -\membersection{wxMouseEvent::Position} - -\func{void}{Position}{\param{float *}{x}, \param{float *}{y}} - -Sets *x and *y to the position at which the event occurred. If the -window is a window, the position is converted to logical units -(according to the current mapping mode) with scrolling taken into -account. To get back to device units (for example to calculate where on the -screen to place a dialog box associated with a window mouse event), use -\rtfsp{\bf wxDC::LogicalToDeviceX} and {\bf wxDC::LogicalToDeviceY}. - -For example, the following code calculates screen pixel coordinates -from the frame position, window view start (assuming the window is the only -subwindow on the frame and therefore at the top left of it), and the -logical event position. A menu is popped up at the position where the -mouse click occurred. (Note that the application should also check that -the dialog box will be visible on the screen, since the click could have -occurred near the screen edge!) - -\begin{verbatim} - float event_x, event_y; - event.Position(&event_x, &event_y); - frame->GetPosition(&x, &y); - window->ViewStart(&x1, &y1); - int mouse_x = (int)(window->GetDC()->LogicalToDeviceX(event_x + x - x1); - int mouse_y = (int)(window->GetDC()->LogicalToDeviceY(event_y + y - y1); - - char *choice = wxGetSingleChoice("Menu", "Pick a node action", - no_choices, choices, frame, mouse_x, mouse_y); -\end{verbatim} - \membersection{wxMouseEvent::RightDClick} -\func{bool}{RightDClick}{\void} +\constfunc{bool}{RightDClick}{\void} Returns TRUE if the event was a right double click. \membersection{wxMouseEvent::RightDown} -\func{bool}{RightDown}{\void} +\constfunc{bool}{RightDown}{\void} Returns TRUE if the right mouse button changed to down. -\membersection{wxMouseEvent::RightIsDown} +\membersection{wxMouseEvent::RightIsDown}\label{wxmouseeventrightisdown} -\func{bool}{RightIsDown}{\void} +\constfunc{bool}{RightIsDown}{\void} Returns TRUE if the right mouse button is currently down, independent of the current event type. \membersection{wxMouseEvent::RightUp} -\func{bool}{RightUp}{\void} +\constfunc{bool}{RightUp}{\void} Returns TRUE if the right mouse button changed to up. \membersection{wxMouseEvent::ShiftDown} -\func{bool}{ShiftDown}{\void} +\constfunc{bool}{ShiftDown}{\void} Returns TRUE if the shift key was down at the time of the event.