added cursor hiding.

synergy/CXWindowsPrimaryScreen.cpp

@@ -49,7 +49,7 @@ void					CXWindowsPrimaryScreen::open(CServer* server)
 	log((CLOG_INFO "primary display size: %dx%d", m_w, m_h));
 
 	// get the root window
-	Window root = RootWindow(m_display, m_screen);
+	m_root = RootWindow(m_display, m_screen);
 
 	// create the grab window.  this window is used to capture user
 	// input when the user is focussed on another client.  don't let
@@ -61,15 +61,15 @@ void					CXWindowsPrimaryScreen::open(CServer* server)
 								 KeymapStateMask;
 	attr.do_not_propagate_mask = 0;
 	attr.override_redirect     = True;
-	attr.cursor                = None;
-	m_window = ::XCreateWindow(m_display, root, 0, 0, m_w, m_h, 0, 0,
+	attr.cursor                = createBlankCursor();
+	m_window = ::XCreateWindow(m_display, m_root, 0, 0, m_w, m_h, 0, 0,
 								InputOnly, CopyFromParent,
 								CWDontPropagate | CWEventMask |
 								CWOverrideRedirect | CWCursor,
 								&attr);
 
 	// start watching for events on other windows
-	selectEvents(root);
+	selectEvents(m_root);
 
 	// start processing events
 	m_eventThread = new CThread(new TMethodJob<CXWindowsPrimaryScreen>(
@@ -179,8 +179,7 @@ void					CXWindowsPrimaryScreen::warpCursor(SInt32 x, SInt32 y)
 {
 
 	// warp the mouse
-	Window root = RootWindow(m_display, m_screen);
-	::XWarpPointer(m_display, None, root, 0, 0, 0, 0, x, y);
+	::XWarpPointer(m_display, None, m_root, 0, 0, 0, 0, x, y);
 	::XSync(m_display, False);
 	log((CLOG_DEBUG "warped to %d,%d", x, y));
 
@@ -233,6 +232,41 @@ void					CXWindowsPrimaryScreen::selectEvents(Window w) const
 	}
 }
 
+Cursor					CXWindowsPrimaryScreen::createBlankCursor()
+{
+	// this seems just a bit more complicated than really necessary
+
+	// get the closet cursor size to 1x1
+	unsigned int w, h;
+	::XQueryBestCursor(m_display, m_root, 1, 1, &w, &h);
+
+	// make bitmap data for cursor of closet size.  since the cursor
+	// is blank we can use the same bitmap for shape and mask:  all
+	// zeros.
+	const int size = ((w + 7) >> 3) * h;
+	char* data = new char[size];
+	memset(data, 0, size);
+
+	// make bitmap
+	Pixmap bitmap = ::XCreateBitmapFromData(m_display, m_root, data, w, h);
+
+	// need an arbitrary color for the cursor
+	XColor color;
+	color.pixel = 0;
+	color.red   = color.green = color.blue = 0;
+	color.flags = DoRed | DoGreen | DoBlue;
+
+	// make cursor from bitmap
+	Cursor cursor = ::XCreatePixmapCursor(m_display, bitmap, bitmap,
+								&color, &color, 0, 0);
+
+	// don't need bitmap or the data anymore
+	delete[] data;
+	::XFreePixmap(m_display, bitmap);
+
+	return cursor;
+}
+
 void					CXWindowsPrimaryScreen::eventThread(void*)
 {
 	for (;;) {

synergy/CXWindowsPrimaryScreen.h

@@ -24,6 +24,7 @@ class CXWindowsPrimaryScreen : public IPrimaryScreen {
 
   private:
 	void				selectEvents(Window) const;
+	Cursor				createBlankCursor();
 
 	void				eventThread(void*);
 	KeyModifierMask		mapModifier(unsigned int state) const;
@@ -35,6 +36,7 @@ class CXWindowsPrimaryScreen : public IPrimaryScreen {
 	CThread*			m_eventThread;
 	Display*			m_display;
 	int					m_screen;
+	Window				m_root;
 	SInt32				m_w, m_h;
 	Window				m_window;
 	bool				m_active;

synergy/CXWindowsSecondaryScreen.cpp

@@ -2,6 +2,7 @@
 #include "CClient.h"
 #include "CThread.h"
 #include "TMethodJob.h"
+#include "CLog.h"
 #include <assert.h>
 #include <X11/X.h>
 #include <X11/extensions/XTest.h>
@@ -33,6 +34,7 @@ void					CXWindowsSecondaryScreen::open(CClient* client)
 	m_client = client;
 
 	// open the display
+	log((CLOG_DEBUG "XOpenDisplay(%s)", "NULL"));
 	m_display = ::XOpenDisplay(NULL);	// FIXME -- allow non-default
 	if (m_display == NULL)
 		throw int(5);	// FIXME -- make exception for this
@@ -44,6 +46,7 @@ void					CXWindowsSecondaryScreen::open(CClient* client)
 	// get screen size
 	m_w = WidthOfScreen(screen);
 	m_h = HeightOfScreen(screen);
+	log((CLOG_INFO "secondary display size: %dx%d", m_w, m_h));
 
 	// verify the availability of the XTest extension
 	int majorOpcode, firstEvent, firstError;
@@ -51,9 +54,30 @@ void					CXWindowsSecondaryScreen::open(CClient* client)
 								&majorOpcode, &firstEvent, &firstError))
 		throw int(6);	// FIXME -- make exception for this
 
+	// get the root window
+	m_root = RootWindow(m_display, m_screen);
+
+	// create the cursor hiding window.  this window is used to hide the
+	// cursor when it's not on the screen.  the window is hidden as soon
+	// as the cursor enters the screen or the display's real cursor is
+	// moved.
+	XSetWindowAttributes attr;
+	attr.event_mask            = LeaveWindowMask;
+	attr.do_not_propagate_mask = 0;
+	attr.override_redirect     = True;
+	attr.cursor                = createBlankCursor();
+	m_window = ::XCreateWindow(m_display, m_root, 0, 0, 1, 1, 0, 0,
+								InputOnly, CopyFromParent,
+								CWDontPropagate | CWEventMask |
+								CWOverrideRedirect | CWCursor,
+								&attr);
+
 	// become impervious to server grabs
 	::XTestGrabControl(m_display, True);
 
+	// hide the cursor
+	leave();
+
 	// start processing events
 	m_eventThread = new CThread(new TMethodJob<CXWindowsSecondaryScreen>(
 								this, &CXWindowsSecondaryScreen::eventThread));
@@ -73,6 +97,10 @@ void					CXWindowsSecondaryScreen::close()
 	// no longer impervious to server grabs
 	::XTestGrabControl(m_display, False);
 
+	// destroy window
+	::XDestroyWindow(m_display, m_window);
+	m_window = None;
+
 	// close the display
 	::XCloseDisplay(m_display);
 	m_display = NULL;
@@ -81,20 +109,25 @@ void					CXWindowsSecondaryScreen::close()
 void					CXWindowsSecondaryScreen::enter(SInt32 x, SInt32 y)
 {
 	assert(m_display != NULL);
+	assert(m_window != None);
 
 	// warp to requested location
 	warpCursor(x, y);
 
 	// show cursor
-	// FIXME
+	::XUnmapWindow(m_display, m_window);
 }
 
 void					CXWindowsSecondaryScreen::leave()
 {
 	assert(m_display != NULL);
+	assert(m_window != None);
 
-	// hide cursor
-	// FIXME
+	// raise and show the hider window
+	::XMapRaised(m_display, m_window);
+
+	// hide cursor by moving it into the hider window
+	::XWarpPointer(m_display, None, m_window, 0, 0, 0, 0, 0, 0);
 }
 
 void					CXWindowsSecondaryScreen::warpCursor(SInt32 x, SInt32 y)
@@ -180,8 +213,46 @@ SInt32					CXWindowsSecondaryScreen::getJumpZoneSize() const
 	return 0;
 }
 
+Cursor					CXWindowsSecondaryScreen::createBlankCursor()
+{
+	// this seems just a bit more complicated than really necessary
+
+	// get the closet cursor size to 1x1
+	unsigned int w, h;
+	::XQueryBestCursor(m_display, m_root, 1, 1, &w, &h);
+
+	// make bitmap data for cursor of closet size.  since the cursor
+	// is blank we can use the same bitmap for shape and mask:  all
+	// zeros.
+	const int size = ((w + 7) >> 3) * h;
+	char* data = new char[size];
+	memset(data, 0, size);
+
+	// make bitmap
+	Pixmap bitmap = ::XCreateBitmapFromData(m_display, m_root, data, w, h);
+
+	// need an arbitrary color for the cursor
+	XColor color;
+	color.pixel = 0;
+	color.red   = color.green = color.blue = 0;
+	color.flags = DoRed | DoGreen | DoBlue;
+
+	// make cursor from bitmap
+	Cursor cursor = ::XCreatePixmapCursor(m_display, bitmap, bitmap,
+								&color, &color, 0, 0);
+
+	// don't need bitmap or the data anymore
+	delete[] data;
+	::XFreePixmap(m_display, bitmap);
+
+	return cursor;
+}
+
 void					CXWindowsSecondaryScreen::eventThread(void*)
 {
+	assert(m_display != NULL);
+	assert(m_window != None);
+
 	for (;;) {
 		// wait for and then get the next event
 		while (XPending(m_display) == 0) {
@@ -193,8 +264,8 @@ void					CXWindowsSecondaryScreen::eventThread(void*)
 		// handle event
 		switch (xevent.type) {
 		  case LeaveNotify:
-			// mouse moved out of window somehow.  hide the window.
-//			::XUnmapWindow(m_display, m_window);
+			// mouse moved out of hider window somehow.  hide the window.
+			::XUnmapWindow(m_display, m_window);
 			break;
 
 /*

synergy/CXWindowsSecondaryScreen.h

@@ -28,6 +28,7 @@ class CXWindowsSecondaryScreen : public ISecondaryScreen {
 	virtual SInt32		getJumpZoneSize() const;
 
   private:
+	Cursor				createBlankCursor();
 	void				eventThread(void*);
 	KeyCode				mapKey(KeyID, KeyModifierMask) const;
 	unsigned int		mapButton(ButtonID button) const;
@@ -37,6 +38,7 @@ class CXWindowsSecondaryScreen : public ISecondaryScreen {
 	CThread*			m_eventThread;
 	Display*			m_display;
 	int					m_screen;
+	Window				m_root;
 	Window				m_window;
 	SInt32				m_w, m_h;
 };