Add option to show taskbar when Flow Launcher is opend

Flow.Launcher.Infrastructure/NativeMethods.txt

@@ -91,4 +91,6 @@
 PBT_APMRESUMESUSPEND
 PowerRegisterSuspendResumeNotification
 PowerUnregisterSuspendResumeNotification
-DeviceNotifyCallbackRoutine
+DeviceNotifyCallbackRoutine
+
+MonitorFromWindow

Flow.Launcher.Infrastructure/UserSettings/Settings.cs

@@ -481,6 +481,7 @@ public bool HideNotifyIcon
         }
         public bool LeaveCmdOpen { get; set; }
         public bool HideWhenDeactivated { get; set; } = true;
+        public bool ShowTaskbarWhenInvoked { get; set; } = false;
 
         private bool _showAtTopmost = false;
         public bool ShowAtTopmost

Flow.Launcher.Infrastructure/Win32Helper.cs

@@ -18,7 +18,7 @@
 using Microsoft.Win32.SafeHandles;
 using Windows.Win32;
 using Windows.Win32.Foundation;
 using Windows.Win32.Graphics.Dwm;
 using Windows.Win32.System.Power;
 using Windows.Win32.System.Threading;
 using Windows.Win32.UI.Input.KeyboardAndMouse;
@@ -27,6 +27,7 @@
 using Point = System.Windows.Point;
 using SystemFonts = System.Windows.SystemFonts;
 
+
 namespace Flow.Launcher.Infrastructure
 {
     public static class Win32Helper
@@ -44,7 +45,7 @@
         {
             var cloaked = cloak ? 1 : 0;
 
             return PInvoke.DwmSetWindowAttribute(
                 GetWindowHandle(window),
                 DWMWINDOWATTRIBUTE.DWMWA_CLOAK,
                 &cloaked,
@@ -55,9 +56,9 @@
         {
             var backdropType = backdrop switch
             {
                 BackdropTypes.Acrylic => DWM_SYSTEMBACKDROP_TYPE.DWMSBT_TRANSIENTWINDOW,
                 BackdropTypes.Mica => DWM_SYSTEMBACKDROP_TYPE.DWMSBT_MAINWINDOW,
                 BackdropTypes.MicaAlt => DWM_SYSTEMBACKDROP_TYPE.DWMSBT_TABBEDWINDOW,
                 _ => DWM_SYSTEMBACKDROP_TYPE.DWMSBT_AUTO
             };
 
@@ -1016,5 +1017,32 @@
         }
 
         #endregion
+
+        #region Taskbar
+
+        public static unsafe void ShowTaskbar()
+        {
+            // Find the taskbar window
+            var taskbarHwnd = PInvoke.FindWindowEx(HWND.Null, HWND.Null, "Shell_TrayWnd", null);
+            if (taskbarHwnd == HWND.Null) return;
+
+            // Magic from https://github.com/Oliviaophia/SmartTaskbar
+            const uint TrayBarFlag = 0x05D1;
+            var mon = PInvoke.MonitorFromWindow(taskbarHwnd, Windows.Win32.Graphics.Gdi.MONITOR_FROM_FLAGS.MONITOR_DEFAULTTONEAREST);
+            PInvoke.PostMessage(taskbarHwnd, TrayBarFlag, new WPARAM(1), new LPARAM((nint)mon.Value));
+        }
+
+        public static void HideTaskbar()
+        {
+            // Find the taskbar window
+            var taskbarHwnd = PInvoke.FindWindowEx(HWND.Null, HWND.Null, "Shell_TrayWnd", null);
+            if (taskbarHwnd == HWND.Null) return;
+
+            // Magic from https://github.com/Oliviaophia/SmartTaskbar
+            const uint TrayBarFlag = 0x05D1;
+            PInvoke.PostMessage(taskbarHwnd, TrayBarFlag, new WPARAM(0), IntPtr.Zero);
+        }
+
+        #endregion
     }
 }

Flow.Launcher/Languages/en.xaml

@@ -81,6 +81,8 @@
     <system:String x:Key="useLogonTaskForStartupTooltip">After uninstallation, you need to manually remove this task (Flow.Launcher Startup) via Task Scheduler</system:String>
     <system:String x:Key="setAutoStartFailed">Error setting launch on startup</system:String>
     <system:String x:Key="hideFlowLauncherWhenLoseFocus">Hide Flow Launcher when focus is lost</system:String>
+    <system:String x:Key="showTaskbarWhenOpened">Show taskbar when Flow Launcher is opened</system:String>
+    <system:String x:Key="showTaskbarWhenOpenedToolTip">Temporarily show the taskbar when Flow Launcher is opened, useful for auto-hidden taskbars.</system:String>
     <system:String x:Key="dontPromptUpdateMsg">Do not show new version notifications</system:String>
     <system:String x:Key="SearchWindowPosition">Search Window Location</system:String>
     <system:String x:Key="SearchWindowScreenRememberLastLaunchLocation">Remember Last Position</system:String>

Flow.Launcher/SettingPages/Views/SettingsPaneGeneral.xaml

@@ -72,6 +72,16 @@
                     OnContent="{DynamicResource enable}" />
             </ui:SettingsCard>
 
+            <ui:SettingsCard
+                Margin="0 4 0 0"
+                Description="{DynamicResource showTaskbarWhenOpenedToolTip}"
+                Header="{DynamicResource showTaskbarWhenOpened}">
+                <ui:ToggleSwitch
+                    IsOn="{Binding Settings.ShowTaskbarWhenInvoked}"
+                    OffContent="{DynamicResource disable}"
+                    OnContent="{DynamicResource enable}" />
+            </ui:SettingsCard>
+
             <ui:SettingsCard
                 Margin="0 4 0 0"
                 Description="{DynamicResource hideNotifyIconToolTip}"

Flow.Launcher/ViewModel/MainViewModel.cs

@@ -64,6 +64,8 @@
             Priority = 0 // Priority is for calculating scores in UpdateResultView
         };
 
+        private bool _taskbarShownByFlow = false;
+
         #endregion
 
         #region Constructor
@@ -2134,6 +2136,13 @@
             {
                 Win32Helper.SwitchToEnglishKeyboardLayout(true);
             }
+
+            // Show the taskbar if the setting is enabled
+            if (Settings.ShowTaskbarWhenInvoked && !_taskbarShownByFlow)
+            {
+                Win32Helper.ShowTaskbar();
+                _taskbarShownByFlow = true;
+            }
         }
 
         public async void Hide(bool reset = true)
@@ -2202,6 +2211,13 @@
                 Win32Helper.RestorePreviousKeyboardLayout();
             }
 
+            // Hide the taskbar if the setting is enabled
+            if (_taskbarShownByFlow)
+            {
+                Win32Helper.HideTaskbar(isOnPrimaryScreen);
+                _taskbarShownByFlow = false;
+            }
+
             // Delay for a while to make sure clock will not flicker
             await Task.Delay(50);