java-game-lib-cvs Mailing List for Lightweight Java Game Library

Update of /cvsroot/java-game-lib/LWJGL/src/native/linux
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv14824/linux

Modified Files:
	org_lwjgl_input_Mouse.c 
Log Message:
Linux: improved cursor position tracking

Index: org_lwjgl_input_Mouse.c
===================================================================
RCS file: /cvsroot/java-game-lib/LWJGL/src/native/linux/org_lwjgl_input_Mouse.c,v
retrieving revision 1.14
retrieving revision 1.15
diff -u -d -r1.14 -r1.15
--- org_lwjgl_input_Mouse.c	28 Sep 2004 13:02:38 -0000	1.14
+++ org_lwjgl_input_Mouse.c	30 Sep 2004 12:31:59 -0000	1.15
@@ -326,17 +326,13 @@
 	return v1 < v2 ? v1 : v2;
 }
 
-void handlePointerMotion(XMotionEvent *event) {
-	int x = event->x;
-	int y = event->y;
-	setCursorPos(x, y);
+static void doHandlePointerMotion(int root_x, int root_y, int win_x, int win_y) {
+	setCursorPos(win_x, win_y);
 	if (!pointer_grabbed || !shouldGrab())
 		return;
-	int x_root = event->x_root;
-	int y_root = event->y_root;
 	// find the window position in root coordinates
-	int win_left = x_root - x;
-	int win_top = y_root - y;
+	int win_left = root_x - win_x;
+	int win_top = root_y - win_y;
 	int win_right = win_left + getWindowWidth();
 	int win_bottom = win_top + getWindowHeight();
 	// cap the window position to the screen dimensions
@@ -345,8 +341,8 @@
 	int border_right = min(getScreenModeWidth(), win_right);
 	int border_bottom = min(getScreenModeHeight(), win_bottom);
 	// determine whether the cursor is outside the bounds
-	bool outside_limits = 	x_root < border_left + POINTER_WARP_BORDER || y_root < border_top + POINTER_WARP_BORDER ||
-							x_root > border_right - POINTER_WARP_BORDER || y_root > border_bottom - POINTER_WARP_BORDER;
+	bool outside_limits = 	root_x < border_left + POINTER_WARP_BORDER || root_y < border_top + POINTER_WARP_BORDER ||
+							root_x > border_right - POINTER_WARP_BORDER || root_y > border_bottom - POINTER_WARP_BORDER;
 	if (outside_limits) {
 		// Find the center of the limits in window coordinates
 		int center_x = (border_right - border_left)/2;
@@ -355,6 +351,10 @@
 	}
 }
 
+void handlePointerMotion(XMotionEvent *event) {
+	doHandlePointerMotion(event->x_root, event->y_root, event->x, event->y);
+}
+
 JNIEXPORT void JNICALL Java_org_lwjgl_input_Mouse_nPoll(JNIEnv * env, jclass clazz, jobject coord_buffer_obj, jobject button_buffer_obj) {
 	int *coords = (int *)(*env)->GetDirectBufferAddress(env, coord_buffer_obj);
 	int coords_length = (*env)->GetDirectBufferCapacity(env, coord_buffer_obj);
@@ -389,7 +389,13 @@
 }
 
 JNIEXPORT void JNICALL Java_org_lwjgl_input_Mouse_nGrabMouse(JNIEnv * env, jclass clazz, jboolean new_grab) {
+	Window root_return, child_return;
+	int root_x, root_y, win_x, win_y;
+	unsigned int mask_return;
+	
 	setGrab(new_grab == JNI_TRUE ? true : false);
 	resetCursorToCenter();
+	XQueryPointer(getDisplay(), getCurrentWindow(), &root_return, &child_return, &root_x, &root_y, &win_x, &win_y, &mask_return);
+	doHandlePointerMotion(root_x, root_y, win_x, win_y);
 	accum_dx = accum_dy = 0;
 }