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Added pointer warping to keep pointer in center of the display

This commit is contained in:
Elias Naur 2002-11-28 21:49:11 +00:00
parent af4368f427
commit 77e86f580c
2 changed files with 41 additions and 7 deletions
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5
src/native/linux/org_lwjgl_Display.cpp
View File

@ -57,6 +57,8 @@ int screen;
int current_fullscreen;
int current_focused;
Window win;
int win_width;
int win_height;
XF86VidModeModeInfo **avail_modes;
XVisualInfo * vis_info;
@ -122,7 +124,8 @@ JNIEXPORT jboolean JNICALL Java_org_lwjgl_Display_nCreate(JNIEnv * env, jclass c
win_width = width;
win_height = height;
current_fullscreen = fullscreen;
current_focused = 0;
disp = XOpenDisplay(NULL);

43
src/native/linux/org_lwjgl_input_Mouse.cpp
View File

@ -49,10 +49,15 @@
#define NUM_BUTTONS 3
#define POINTER_WARP_BORDER 10
#define WARP_RETRY 5
extern Display *disp;
extern Window win;
extern int screen;
extern int current_fullscreen;
extern int win_width;
extern int win_height;
bool pointer_grabbed;
@ -182,10 +187,6 @@ JNIEXPORT jboolean JNICALL Java_org_lwjgl_input_Mouse_nCreate
#endif
return JNI_FALSE;
}
XWarpPointer(disp, None, win, 0, 0, 0, 0, 0, 0);
XEvent event;
while (XCheckMaskEvent(disp, ButtonPressMask | ButtonReleaseMask | PointerMotionMask, &event))
; // delete events that are pending
return JNI_TRUE;
}
@ -266,8 +267,8 @@ int checkPointer() {
}
break;
case MotionNotify:
current_x = event.xbutton.x;
current_y = event.xbutton.y;
current_x = event.xmotion.x;
current_y = event.xmotion.y;
break;
default: assert(0);
}
@ -275,6 +276,34 @@ int checkPointer() {
return count;
}
void warpPointer(void) {
int i;
// Reset pointer to middle of screen if inside a certain inner border
if (current_x < POINTER_WARP_BORDER || current_y < POINTER_WARP_BORDER ||
current_x > win_width - POINTER_WARP_BORDER || current_y > win_height - POINTER_WARP_BORDER) {
current_x = last_x = win_width/2;
current_y = last_y = win_height/2;
XWarpPointer(disp, None, win, 0, 0, 0, 0, current_x, current_y);
XEvent event;
// Try to catch the warp pointer event
for (i = 0; i < WARP_RETRY; i++) {
XMaskEvent(disp, PointerMotionMask, &event);
if (event.xmotion.x > current_x - POINTER_WARP_BORDER &&
event.xmotion.x < current_x + POINTER_WARP_BORDER &&
event.xmotion.y > current_y - POINTER_WARP_BORDER &&
event.xmotion.y < current_y + POINTER_WARP_BORDER)
break;
#ifdef _DEBUG
printf("Skipped event searching for warp event %d, %d\n", event.xmotion.x, event.xmotion.y);
#endif
}
#ifdef _DEBUG
if (i == WARP_RETRY)
printf("Never got warp event\n");
#endif
}
}
/*
* Class: org_lwjgl_input_Mouse
* Method: nPoll
@ -297,4 +326,6 @@ JNIEXPORT void JNICALL Java_org_lwjgl_input_Mouse_nPoll
unsigned char * class_buttons = (unsigned char *) env->GetPrimitiveArrayCritical(buttonsArray, NULL);
memcpy(class_buttons, buttons, NUM_BUTTONS*sizeof(unsigned char));
env->ReleasePrimitiveArrayCritical(buttonsArray, class_buttons, 0);
if (current_fullscreen)
warpPointer();
}