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Fixed wrong ActiveWindow-Parameters through observing window-title-changes and un-minimizing

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This commit is contained in:
Darth Affe 2016-12-19 11:53:06 +01:00
parent b457c566dd
commit 75afc1bea8
1 changed files with 71 additions and 11 deletions
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80
Artemis/Artemis/Utilities/ActiveWindowHelper.cs
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@ -26,8 +26,10 @@ namespace Artemis.Utilities
#region Constants #region Constants
private const uint WINEVENT_OUTOFCONTEXT = 0; private const uint WINEVENT_OUTOFCONTEXT = 0x0000;
private const uint EVENT_SYSTEM_FOREGROUND = 3; private const uint EVENT_SYSTEM_FOREGROUND = 0x0003;
private const uint EVENT_OBJECT_NAMECHANGE = 0x800C;
private const uint EVENT_SYSTEM_MINIMIZEEND = 0x0017;
private const int MAX_TITLE_LENGTH = 256; private const int MAX_TITLE_LENGTH = 256;
@ -37,7 +39,15 @@ namespace Artemis.Utilities
// DarthAffe 17.12.2016: We need to keep a reference to this or it might get collected by the garbage collector and cause some random crashes afterwards. // DarthAffe 17.12.2016: We need to keep a reference to this or it might get collected by the garbage collector and cause some random crashes afterwards.
private static WinEventDelegate _activeWindowChangedDelegate; private static WinEventDelegate _activeWindowChangedDelegate;
private static IntPtr _winEventHook; private static IntPtr _activeWindowEventHook;
private static WinEventDelegate _windowTitleChangedDelegate;
private static IntPtr _windowTitleEventHook;
private static WinEventDelegate _windowMinimizedChangedDelegate;
private static IntPtr _windowMinimizedEventHook;
private static IntPtr _activeWindow;
public static string ActiveWindowProcessName { get; private set; } public static string ActiveWindowProcessName { get; private set; }
public static string ActiveWindowWindowTitle { get; private set; } public static string ActiveWindowWindowTitle { get; private set; }
@ -49,6 +59,28 @@ namespace Artemis.Utilities
private static void ActiveWindowChanged(IntPtr hWinEventHook, uint eventType, private static void ActiveWindowChanged(IntPtr hWinEventHook, uint eventType,
IntPtr hwnd, int idObject, int idChild, uint dwEventThread, uint dwmsEventTime) IntPtr hwnd, int idObject, int idChild, uint dwEventThread, uint dwmsEventTime)
{ {
UpdateForWindow(hwnd);
}
private static void WindowTitleChanged(IntPtr hWinEventHook, uint eventType,
IntPtr hwnd, int idObject, int idChild, uint dwEventThread, uint dwmsEventTime)
{
if (_activeWindow == hwnd)
UpdateForWindow(hwnd);
}
private static void WindowMinimizedChanged(IntPtr hWinEventHook, uint eventType,
IntPtr hwnd, int idObject, int idChild, uint dwEventThread, uint dwmsEventTime)
{
// DarthAffe 19.12.2016: We expect currently un-minimized windows to be active.
// DarthAffe 19.12.2016: The result of the API-function GetActiveWindow at this moment is 'idle' so we can't use this to validate this estimation.
UpdateForWindow(hwnd);
}
private static void UpdateForWindow(IntPtr hwnd)
{
_activeWindow = hwnd;
ActiveWindowProcessName = GetActiveWindowProcessName(hwnd) ?? string.Empty; ActiveWindowProcessName = GetActiveWindowProcessName(hwnd) ?? string.Empty;
ActiveWindowWindowTitle = GetActiveWindowTitle(hwnd) ?? string.Empty; ActiveWindowWindowTitle = GetActiveWindowTitle(hwnd) ?? string.Empty;
} }
@ -84,10 +116,23 @@ namespace Artemis.Utilities
{ {
try try
{ {
if (_winEventHook != IntPtr.Zero) return; if (_activeWindowEventHook == IntPtr.Zero)
{
_activeWindowChangedDelegate = ActiveWindowChanged;
_activeWindowEventHook = SetWinEventHook(EVENT_SYSTEM_FOREGROUND, EVENT_SYSTEM_FOREGROUND, IntPtr.Zero, _activeWindowChangedDelegate, 0, 0, WINEVENT_OUTOFCONTEXT);
}
_activeWindowChangedDelegate = ActiveWindowChanged; if (_windowTitleEventHook == IntPtr.Zero)
_winEventHook = SetWinEventHook(EVENT_SYSTEM_FOREGROUND, EVENT_SYSTEM_FOREGROUND, IntPtr.Zero, _activeWindowChangedDelegate, 0, 0, WINEVENT_OUTOFCONTEXT); {
_windowTitleChangedDelegate = WindowTitleChanged;
_windowTitleEventHook = SetWinEventHook(EVENT_OBJECT_NAMECHANGE, EVENT_OBJECT_NAMECHANGE, IntPtr.Zero, _windowTitleChangedDelegate, 0, 0, WINEVENT_OUTOFCONTEXT);
}
if (_windowMinimizedEventHook == IntPtr.Zero)
{
_windowMinimizedChangedDelegate = WindowMinimizedChanged;
_windowMinimizedEventHook = SetWinEventHook(EVENT_SYSTEM_MINIMIZEEND, EVENT_SYSTEM_MINIMIZEEND, IntPtr.Zero, _windowMinimizedChangedDelegate, 0, 0, WINEVENT_OUTOFCONTEXT);
}
} }
catch { /* catch'em all - I don't want it to crash here */ } catch { /* catch'em all - I don't want it to crash here */ }
} }
@ -96,11 +141,26 @@ namespace Artemis.Utilities
{ {
try try
{ {
if (_winEventHook == IntPtr.Zero) return; if (_activeWindowEventHook != IntPtr.Zero)
{
UnhookWinEvent(_activeWindowEventHook);
_activeWindowChangedDelegate = null;
_activeWindowEventHook = IntPtr.Zero;
}
UnhookWinEvent(_winEventHook); if (_windowTitleEventHook != IntPtr.Zero)
_activeWindowChangedDelegate = null; {
_winEventHook = IntPtr.Zero; UnhookWinEvent(_windowTitleEventHook);
_windowTitleChangedDelegate = null;
_windowTitleEventHook = IntPtr.Zero;
}
if (_windowMinimizedEventHook != IntPtr.Zero)
{
UnhookWinEvent(_windowMinimizedEventHook);
_windowMinimizedChangedDelegate = null;
_windowMinimizedEventHook = IntPtr.Zero;
}
} }
catch { /* catch'em all - I don't want it to crash here */ } catch { /* catch'em all - I don't want it to crash here */ }
} }