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documented Left[Is]Down behaviour and changed the obsolete test in the sample

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_2_BRANCH@7609 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2000-06-20 07:14:39 +00:00
parent c10d06a2bb
commit 5c5978df98
2 changed files with 17 additions and 6 deletions
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14
docs/latex/wx/mouseevt.tex
View File

@@ -9,6 +9,20 @@ 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 left the window and the state variables for it may have changed during this
time. 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} \wxheading{Derived from}
\helpref{wxEvent}{wxevent} \helpref{wxEvent}{wxevent}

9
samples/scroll/scroll.cpp
View File

@@ -188,12 +188,9 @@ void MyCanvas::OnMouseDown( wxMouseEvent &event )
int x,y; int x,y;
CalcUnscrolledPosition( pt.x, pt.y, &x, &y ); CalcUnscrolledPosition( pt.x, pt.y, &x, &y );
wxLogMessage( "Mouse down event at: %d %d, scrolled: %d %d", pt.x, pt.y, x, y ); wxLogMessage( "Mouse down event at: %d %d, scrolled: %d %d", pt.x, pt.y, x, y );
}
if ( !event.LeftIsDown() )
if (event.LeftIsDown() && wxLogMessage( "Error: LeftIsDown() should be TRUE if for LeftDown()" );
event.LeftDown())
{
wxLogMessage( "Error: both LeftDown() and LeftIsDown() are TRUE!" );
} }
} }