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added workaround for bug windows 98 (Me?) and multiple displays: 

absolute mouse_event() moves don't work except for primary
display.
This commit is contained in:
crs 2002-06-20 11:13:37 +00:00
parent 4f418e015e
commit c4fea1c32b
2 changed files with 116 additions and 14 deletions
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115
client/CMSWindowsSecondaryScreen.cpp
View File

@ -9,6 +9,14 @@
#include "CLog.h"
#include <cctype>
// these are only defined when WINVER >= 0x0500
#if !defined(SPI_GETMOUSESPEED)
#define SPI_GETMOUSESPEED 112
#endif
#if !defined(SPI_SETMOUSESPEED)
#define SPI_SETMOUSESPEED 113
#endif
//
// CMSWindowsSecondaryScreen
//
@ -135,7 +143,7 @@ CMSWindowsSecondaryScreen::enter(SInt32 x, SInt32 y, KeyModifierMask mask)
toggleKey(VK_SCROLL, KeyModifierScrollLock);
}
// hide mouse
// show mouse
onEnter(x, y);
}
@ -338,13 +346,7 @@ CMSWindowsSecondaryScreen::mouseMove(SInt32 x, SInt32 y)
CLock lock(&m_mutex);
assert(m_window != NULL);
syncDesktop();
SInt32 x0, y0, w, h;
getScreenShape(x0, y0, w, h);
mouse_event(MOUSEEVENTF_MOVE | MOUSEEVENTF_ABSOLUTE,
(DWORD)((65535.99 * (x - x0)) / (w - 1)),
(DWORD)((65535.99 * (y - y0)) / (h - 1)),
0, 0);
warpCursor(x, y);
}
void
@ -427,6 +429,9 @@ CMSWindowsSecondaryScreen::onOpenDisplay()
{
assert(m_window == NULL);
// note if using multiple monitors
m_multimon = isMultimon();
// save thread id. we'll need to pass this to the hook library.
m_threadID = GetCurrentThreadId();
@ -546,6 +551,7 @@ CMSWindowsSecondaryScreen::onEvent(HWND hwnd, UINT msg,
case WM_DISPLAYCHANGE:
// screen resolution has changed
updateScreenShape();
m_multimon = isMultimon();
m_client->onResolutionChanged();
return 0;
}
@ -557,12 +563,7 @@ void
CMSWindowsSecondaryScreen::onEnter(SInt32 x, SInt32 y)
{
// warp to requested location
SInt32 x0, y0, w, h;
getScreenShape(x0, y0, w, h);
mouse_event(MOUSEEVENTF_MOVE | MOUSEEVENTF_ABSOLUTE,
(DWORD)((65535.99 * (x - x0)) / (w - 1)),
(DWORD)((65535.99 * (y - y0)) / (h - 1)),
0, 0);
warpCursor(x, y);
// show cursor
ShowWindow(m_window, SW_HIDE);
@ -736,6 +737,92 @@ CMSWindowsSecondaryScreen::getCurrentDesktopName() const
return m_deskName;
}
void
CMSWindowsSecondaryScreen::warpCursor(SInt32 x, SInt32 y)
{
// move the mouse directly to target position on NT family or if
// not using multiple monitors.
if (!m_multimon || !m_is95Family) {
SInt32 x0, y0, w, h;
getScreenShape(x0, y0, w, h);
mouse_event(MOUSEEVENTF_MOVE | MOUSEEVENTF_ABSOLUTE,
(DWORD)((65535.99 * (x - x0)) / (w - 1)),
(DWORD)((65535.99 * (y - y0)) / (h - 1)),
0, 0);
}
// windows 98 (and Me?) is broken. you cannot set the absolute
// position of the mouse except on the primary monitor but you
// can do relative moves onto any monitor. this is, in microsoft's
// words, "by design." apparently the designers of windows 2000
// we're a little less lazy and did it right.
//
// we use the microsoft recommendation (Q193003): set the absolute
// position on the primary monitor, disable mouse acceleration,
// relative move the mouse to the final location, restore mouse
// acceleration. to avoid one kind of race condition (the user
// clicking the mouse or pressing a key between the absolute and
// relative move) we'll use SendInput() which guarantees that the
// events are delivered uninterrupted. we cannot prevent changes
// to the mouse acceleration at inopportune times, though.
//
// point-to-activate (x-mouse) doesn't seem to be bothered by the
// absolute/relative combination. a window over the absolute
// position (0,0) does *not* get activated (at least not on win2k)
// if the relative move puts the cursor elsewhere. similarly, the
// app under the final mouse position does *not* get deactivated
// by the absolute move to 0,0.
else {
// save mouse speed & acceleration
int oldSpeed[4];
bool accelChanged =
SystemParametersInfo(SPI_GETMOUSE,0, oldSpeed,0) &&
SystemParametersInfo(SPI_GETMOUSESPEED, 0, oldSpeed + 3, 0);
// use 1:1 motion
if (accelChanged) {
int newSpeed[4] = { 0, 0, 0, 1 };
accelChanged =
SystemParametersInfo(SPI_SETMOUSE, 0, newSpeed, 0) ||
SystemParametersInfo(SPI_SETMOUSESPEED, 0, newSpeed + 3, 0);
}
// send events
INPUT events[2];
events[0].type = INPUT_MOUSE;
events[0].mi.dx = 0;
events[0].mi.dy = 0;
events[0].mi.mouseData = 0;
events[0].mi.dwFlags = MOUSEEVENTF_ABSOLUTE | MOUSEEVENTF_MOVE;
events[0].mi.time = GetTickCount();
events[0].mi.dwExtraInfo = 0;
events[1].type = INPUT_MOUSE;
events[1].mi.dx = x;
events[1].mi.dy = y;
events[1].mi.mouseData = 0;
events[1].mi.dwFlags = MOUSEEVENTF_MOVE;
events[1].mi.time = events[0].mi.time;
events[1].mi.dwExtraInfo = 0;
SendInput(sizeof(events) / sizeof(events[0]),
events, sizeof(events[0]));
// restore mouse speed & acceleration
if (accelChanged) {
SystemParametersInfo(SPI_SETMOUSE, 0, oldSpeed, 0);
SystemParametersInfo(SPI_SETMOUSESPEED, 0, oldSpeed + 3, 0);
}
}
}
bool
CMSWindowsSecondaryScreen::isMultimon() const
{
SInt32 x0, y0, w, h;
getScreenShape(x0, y0, w, h);
return (w != GetSystemMetrics(SM_CXSCREEN) ||
h != GetSystemMetrics(SM_CYSCREEN));
}
// these tables map KeyID (a X windows KeySym) to virtual key codes.
// if the key is an extended key then the entry is the virtual key
// code | 0x100. keys that map to normal characters have a 0 entry

15
client/CMSWindowsSecondaryScreen.h
View File

@ -1,6 +1,12 @@
#ifndef CMSWINDOWSSECONDARYSCREEN_H
#define CMSWINDOWSSECONDARYSCREEN_H
// ensure that we get SendInput()
#if _WIN32_WINNT <= 0x400
#undef _WIN32_WINNT
#define _WIN32_WINNT 0x401
#endif
#include "CMSWindowsScreen.h"
#include "ISecondaryScreen.h"
#include "CMutex.h"
@ -66,6 +72,12 @@ private:
// get calling thread to use the input desktop
void syncDesktop() const;
// warp the mouse to the specified position
void warpCursor(SInt32 x, SInt32 y);
// returns true iff there appear to be multiple monitors
bool isMultimon() const;
// key and button queries and operations
DWORD mapButton(ButtonID button, bool press) const;
KeyModifierMask mapKey(Keystrokes&, UINT& virtualKey, KeyID,
@ -86,6 +98,9 @@ private:
// true if windows 95/98/me
bool m_is95Family;
// true if system appears to have multiple monitors
bool m_multimon;
// the main loop's thread id
DWORD m_threadID;