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Fix multi screen-dpi issue #367

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Fix multi screen-dpi issue #367

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5c5f25c
Fixed the issue of the secondary screen's taskbar becoming transparen…
lingyongji Mar 18, 2026
58cadb4
ignore
lingyongji Mar 19, 2026
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9 changes: 9 additions & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
@@ -0,0 +1,9 @@
################################################################################
# 此 .gitignore 文件已由 Microsoft(R) Visual Studio 自动创建。
################################################################################

/.dotnet_cli/.dotnet
/.vs
/bin/*
/obj/*
/LiteMonitor.Updater/*
3 changes: 2 additions & 1 deletion src/System/Program.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -84,6 +84,7 @@ static void Main()
try
{
// ★★★ 3. 启动应用 ★★★
Application.SetHighDpiMode(HighDpiMode.PerMonitorV2);
ApplicationConfiguration.Initialize();
Application.Run(new MainForm());
}
Expand Down Expand Up @@ -148,4 +149,4 @@ static void LogCrash(Exception? ex, string source)
}
}
}
}
}
17 changes: 11 additions & 6 deletions src/UI/Helpers/TaskbarWinHelper.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -215,7 +215,7 @@ private IntPtr FindSecondaryTaskbar(Screen screen)
if (screen.Bounds.Contains(r.Location) || screen.Bounds.IntersectsWith(r))
return hWnd;
}
return FindWindow("Shell_TrayWnd", null);
return IntPtr.Zero;
}

public Rectangle GetTaskbarRect(IntPtr hTaskbar, string targetDevice)
Expand Down Expand Up @@ -264,7 +264,7 @@ public Rectangle GetTaskbarRect(IntPtr hTaskbar, string targetDevice)

if (!isVertical)
{
int dpi = GetTaskbarDpi();
int dpi = GetTaskbarDpi(hTaskbar);
int standardHeight = (int)Math.Round(48.0 * dpi / 96.0);

if (rectPhys.Height > (standardHeight * 0.8))
Expand Down Expand Up @@ -312,16 +312,21 @@ public static bool IsCenterAligned()
catch { return false; }
}

public static int GetTaskbarDpi()
public static int GetTaskbarDpi(IntPtr hWnd)
{
IntPtr taskbar = FindWindow("Shell_TrayWnd", null);
if (taskbar != IntPtr.Zero)
if (hWnd != IntPtr.Zero)
{
try { return (int)GetDpiForWindow(taskbar); } catch { }
try { return (int)GetDpiForWindow(hWnd); } catch { }
}
return 96;
}

public static int GetTaskbarDpi()
{
IntPtr taskbar = FindWindow("Shell_TrayWnd", null);
return GetTaskbarDpi(taskbar);
}

public static int GetWidgetsWidth()
{
int dpi = GetTaskbarDpi();
Expand Down
8 changes: 5 additions & 3 deletions src/UI/TaskbarForm.cs
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Expand Up @@ -57,12 +57,11 @@ public TaskbarForm(Settings cfg, UIController ui, MainForm mainForm)
TopMost = false;
DoubleBuffered = true;

ReloadLayout();

_bizHelper.CheckTheme(true);
_bizHelper.FindHandles();

_bizHelper.AttachToTaskbar();
ReloadLayout();
_winHelper.ApplyLayeredStyle(_bizHelper.TransparentKey, _cfg.TaskbarClickThrough);

_timer.Interval = Math.Max(_cfg.RefreshMs, 60);
Expand All @@ -79,7 +78,10 @@ public void ReloadLayout()
{
_layout = new HorizontalLayout(ThemeManager.Current, 300, LayoutMode.Taskbar, _cfg);
_lastLayoutSignature = ""; // 重置签名，强制重算
_winHelper.ApplyLayeredStyle(_bizHelper.TransparentKey, _cfg.TaskbarClickThrough);
if (IsHandleCreated)
{
_winHelper.ApplyLayeredStyle(_bizHelper.TransparentKey, _cfg.TaskbarClickThrough);
}
_bizHelper.CheckTheme(true);

// 更新悬浮窗模式 (支持热切换)
Expand Down