Mercurial > sdl-ios-xcode
view docs/man3/SDL_MouseButtonEvent.3 @ 717:42ed44b2c8b6
Date: Sun, 14 Sep 2003 17:04:55 -0400
From: Philip D.S. Thoren <pthoren@cs.uml.edu>
Reply-To: "sdl@libsdl.org" <sdl@libsdl.org>
To: "sdl@libsdl.org" <sdl@libsdl.org>
Subject: [SDL] BUG in src/video/windx5/SDL_dx5events.c
I tracked down a bug that crashed my program on Windows *all* the
time.
FILE: src/video/windx5/SDL_dx5events.c
FUNCTION: handle_mouse
BUG:
SDL_PublicSurface is being dereferenced when it is NULL.
I added the following to the very begining of handle_mouse
and it solved my crashing problems:
if (SDL_PublicSurface == NULL) return;
~ Philip D.S. Thoren
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Mon, 15 Sep 2003 13:51:25 +0000 |
parents | e5bc29de3f0a |
children | 546f7c1eb755 |
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.TH "SDL_MouseButtonEvent" "3" "Tue 11 Sep 2001, 22:59" "SDL" "SDL API Reference" .SH "NAME" SDL_MouseButtonEvent\- Mouse button event structure .SH "STRUCTURE DEFINITION" .PP .nf \f(CWtypedef struct{ Uint8 type; Uint8 button; Uint8 state; Uint16 x, y; } SDL_MouseButtonEvent;\fR .fi .PP .SH "STRUCTURE DATA" .TP 20 \fBtype\fR \fBSDL_MOUSEBUTTONDOWN\fP or \fBSDL_MOUSEBUTTONUP\fP .TP 20 \fBbutton\fR The mouse button index (SDL_BUTTON_LEFT, SDL_BUTTON_MIDDLE, SDL_BUTTON_RIGHT) .TP 20 \fBstate\fR \fBSDL_PRESSED\fP or \fBSDL_RELEASED\fP .TP 20 \fBx\fR, \fBy\fR The X/Y coordinates of the mouse at press/release time .SH "DESCRIPTION" .PP \fBSDL_MouseButtonEvent\fR is a member of the \fI\fBSDL_Event\fR\fR union and is used when an event of type \fBSDL_MOUSEBUTTONDOWN\fP or \fBSDL_MOUSEBUTTONUP\fP is reported\&. .PP When a mouse button press or release is detected then number of the button pressed (from 1 to 255, with 1 usually being the left button and 2 the right) is placed into \fBbutton\fR, the position of the mouse when this event occured is stored in the \fBx\fR and the \fBy\fR fields\&. Like \fI\fBSDL_KeyboardEvent\fR\fR, information on whether the event was a press or a release event is stored in both the \fBtype\fR and \fBstate\fR fields, but this should be obvious\&. .SH "SEE ALSO" .PP \fI\fBSDL_Event\fR\fR, \fI\fBSDL_MouseMotionEvent\fR\fR ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 22:59