Initial revision

1 files changed, 457 insertions, 0 deletions

diff --git a/win/tkWinPointer.c b/win/tkWinPointer.c
new file mode 100644
index 0000000..96661ae
--- /dev/null
+++ b/win/tkWinPointer.c
@@ -0,0 +1,457 @@
+/* 
+ * tkWinPointer.c --
+ *
+ *	Windows specific mouse tracking code.
+ *
+ * Copyright (c) 1995-1997 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * SCCS: @(#) tkWinPointer.c 1.28 97/10/31 08:40:07
+ */
+
+#include "tkWinInt.h"
+
+/*
+ * Check for enter/leave events every MOUSE_TIMER_INTERVAL milliseconds.
+ */
+
+#define MOUSE_TIMER_INTERVAL 250
+
+/*
+ * Declarations of static variables used in this file.
+ */
+
+static int captured = 0;		/* 1 if mouse is currently captured. */
+static TkWindow *keyboardWinPtr = NULL; /* Current keyboard grab window. */
+static Tcl_TimerToken mouseTimer;	/* Handle to the latest mouse timer. */
+static int mouseTimerSet = 0;		/* 1 if the mouse timer is active. */
+
+/*
+ * Forward declarations of procedures used in this file.
+ */
+
+static void		MouseTimerProc _ANSI_ARGS_((ClientData clientData));
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkWinGetModifierState --
+ *
+ *	Return the modifier state as of the last message.
+ *
+ * Results:
+ *	Returns the X modifier mask.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TkWinGetModifierState()
+{
+    int state = 0;
+
+    if (GetKeyState(VK_SHIFT) & 0x8000) {
+	state |= ShiftMask;
+    }
+    if (GetKeyState(VK_CONTROL) & 0x8000) {
+	state |= ControlMask;
+    }
+    if (GetKeyState(VK_MENU) & 0x8000) {
+	state |= Mod2Mask;
+    }
+    if (GetKeyState(VK_CAPITAL) & 0x0001) {
+	state |= LockMask;
+    }
+    if (GetKeyState(VK_NUMLOCK) & 0x0001) {
+	state |= Mod1Mask;
+    }
+    if (GetKeyState(VK_SCROLL) & 0x0001) {
+	state |= Mod3Mask;
+    }
+    if (GetKeyState(VK_LBUTTON) & 0x8000) {
+	state |= Button1Mask;
+    }
+    if (GetKeyState(VK_MBUTTON) & 0x8000) {
+	state |= Button2Mask;
+    }
+    if (GetKeyState(VK_RBUTTON) & 0x8000) {
+	state |= Button3Mask;
+    }
+    return state;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tk_PointerEvent --
+ *
+ *	This procedure is called for each pointer-related event.
+ *	It converts the position to root coords and updates the
+ *	global pointer state machine.  It also ensures that the
+ *	mouse timer is scheduled.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	May queue events and change the grab state.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+Tk_PointerEvent(hwnd, x, y)
+    HWND hwnd;				/* Window for coords, or NULL for
+					 * the root window. */
+    int x, y;				/* Coords relative to hwnd, or screen
+					 * if hwnd is NULL. */
+{
+    POINT pos;
+    int state;
+    Tk_Window tkwin;
+
+    pos.x = x;
+    pos.y = y;
+
+    /*
+     * Convert client coords to root coords if we were given a window.
+     */
+
+    if (hwnd) {
+	ClientToScreen(hwnd, &pos);
+    }
+
+    /*
+     * If the mouse is captured, Windows will report all pointer
+     * events to the capture window.  So, we need to determine which
+     * window the mouse is really over and change the event.  Note
+     * that the computed hwnd may point to a window not owned by Tk,
+     * or a toplevel decorative frame, so tkwin can be NULL.
+     */
+
+    if (captured || hwnd == NULL) {
+	hwnd = WindowFromPoint(pos);
+    }
+    tkwin = Tk_HWNDToWindow(hwnd);
+
+    state = TkWinGetModifierState();
+
+    Tk_UpdatePointer(tkwin, pos.x, pos.y, state);
+
+    if ((captured || tkwin) && !mouseTimerSet) {
+	mouseTimerSet = 1;
+	mouseTimer = Tcl_CreateTimerHandler(MOUSE_TIMER_INTERVAL,
+		MouseTimerProc, NULL);
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * XGrabKeyboard --
+ *
+ *	Simulates a keyboard grab by setting the focus.
+ *
+ * Results:
+ *	Always returns GrabSuccess.
+ *
+ * Side effects:
+ *	Sets the keyboard focus to the specified window.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+XGrabKeyboard(display, grab_window, owner_events, pointer_mode,
+	keyboard_mode, time)
+    Display* display;
+    Window grab_window;
+    Bool owner_events;
+    int pointer_mode;
+    int keyboard_mode;
+    Time time;
+{
+    keyboardWinPtr = TkWinGetWinPtr(grab_window);
+    return GrabSuccess;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * XUngrabKeyboard --
+ *
+ *	Releases the simulated keyboard grab.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Sets the keyboard focus back to the value before the grab.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+XUngrabKeyboard(display, time)
+    Display* display;
+    Time time;
+{
+    keyboardWinPtr = NULL;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * MouseTimerProc --
+ *
+ *	Check the current mouse position and look for enter/leave 
+ *	events.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	May schedule a new timer and/or generate enter/leave events.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+MouseTimerProc(clientData)
+    ClientData clientData;
+{
+    POINT pos;
+
+    mouseTimerSet = 0;
+
+    /*
+     * Get the current mouse position and window.  Don't do anything
+     * if the mouse hasn't moved since the last time we looked.
+     */
+
+    GetCursorPos(&pos);
+    Tk_PointerEvent(NULL, pos.x, pos.y);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkGetPointerCoords --
+ *
+ *	Fetch the position of the mouse pointer.
+ *
+ * Results:
+ *	*xPtr and *yPtr are filled in with the root coordinates
+ *	of the mouse pointer for the display.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkGetPointerCoords(tkwin, xPtr, yPtr)
+    Tk_Window tkwin;		/* Window that identifies screen on which
+				 * lookup is to be done. */
+    int *xPtr, *yPtr;		/* Store pointer coordinates here. */
+{
+    POINT point;
+
+    GetCursorPos(&point);
+    *xPtr = point.x;
+    *yPtr = point.y;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * XQueryPointer --
+ *
+ *	Check the current state of the mouse.  This is not a complete
+ *	implementation of this function.  It only computes the root
+ *	coordinates and the current mask.
+ *
+ * Results:
+ *	Sets root_x_return, root_y_return, and mask_return.  Returns
+ *	true on success.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+Bool
+XQueryPointer(display, w, root_return, child_return, root_x_return,
+	root_y_return, win_x_return, win_y_return, mask_return)
+    Display* display;
+    Window w;
+    Window* root_return;
+    Window* child_return;
+    int* root_x_return;
+    int* root_y_return;
+    int* win_x_return;
+    int* win_y_return;
+    unsigned int* mask_return;
+{
+    display->request++;
+    TkGetPointerCoords(NULL, root_x_return, root_y_return);
+    *mask_return = TkWinGetModifierState();
+    return True;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * XGetInputFocus --
+ *
+ *	Retrieves the current keyboard focus window.
+ *
+ * Results:
+ *	Returns the current focus window.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+XGetInputFocus(display, focus_return, revert_to_return)
+    Display *display;
+    Window *focus_return;
+    int *revert_to_return;
+{
+    Tk_Window tkwin = Tk_HWNDToWindow(GetFocus());
+    *focus_return = tkwin ? Tk_WindowId(tkwin) : None;
+    *revert_to_return = RevertToParent;
+    display->request++;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * XSetInputFocus --
+ *
+ *	Set the current focus window.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Changes the keyboard focus and causes the selected window to
+ *	be activated.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+XSetInputFocus(display, focus, revert_to, time)
+    Display* display;
+    Window focus;
+    int revert_to;
+    Time time;
+{
+    display->request++;
+    if (focus != None) {
+	SetFocus(Tk_GetHWND(focus));
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpChangeFocus --
+ *
+ *	This procedure is invoked to move the system focus from
+ *	one window to another.
+ *
+ * Results:
+ *	The return value is the serial number of the command that
+ *	changed the focus.  It may be needed by the caller to filter
+ *	out focus change events that were queued before the command.
+ *	If the procedure doesn't actually change the focus then
+ *	it returns 0.
+ *
+ * Side effects:
+ *	The official Windows focus window changes;  the application's focus
+ *	window isn't changed by this procedure.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TkpChangeFocus(winPtr, force)
+    TkWindow *winPtr;		/* Window that is to receive the X focus. */
+    int force;			/* Non-zero means claim the focus even
+				 * if it didn't originally belong to
+				 * topLevelPtr's application. */
+{
+    TkDisplay *dispPtr = winPtr->dispPtr;
+    Window focusWindow;
+    int dummy, serial;
+    TkWindow *winPtr2;
+
+    if (!force) {
+	XGetInputFocus(dispPtr->display, &focusWindow, &dummy);
+	winPtr2 = (TkWindow *) Tk_IdToWindow(dispPtr->display, focusWindow);
+	if ((winPtr2 == NULL) || (winPtr2->mainPtr != winPtr->mainPtr)) {
+	    return 0;
+	}
+    }
+
+    if (winPtr->window == None) {
+	panic("ChangeXFocus got null X window");
+    }
+    XSetInputFocus(dispPtr->display, winPtr->window, RevertToParent,
+	    CurrentTime);
+
+    /*
+     * Remember the current serial number for the X server and issue
+     * a dummy server request.  This marks the position at which we
+     * changed the focus, so we can distinguish FocusIn and FocusOut
+     * events on either side of the mark.
+     */
+
+    serial = NextRequest(winPtr->display);
+    XNoOp(winPtr->display);
+    return serial;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpSetCapture --
+ *
+ *	This function captures the mouse so that all future events
+ *	will be reported to this window, even if the mouse is outside
+ *	the window.  If the specified window is NULL, then the mouse
+ *	is released. 
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Sets the capture flag and captures the mouse.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkpSetCapture(winPtr)
+    TkWindow *winPtr;			/* Capture window, or NULL. */
+{
+    if (winPtr) {
+	SetCapture(Tk_GetHWND(Tk_WindowId(winPtr)));
+	captured = 1;
+    } else {
+	captured = 0;
+	ReleaseCapture();
+    }
+}