Actively Dim Unfocused Windows

Return to DisplayFusion Scripted Functions (Macros)

Description	This script will stay running in the background, and dim all windows except for the currently focused window. To stop the script, just run it a second time.
Language	C#
Minimum Version	8.1.2+
Created By	Thomas Malloch (BFS)
Contributors	-
Date Created	Mar 24, 2017
Date Last Modified	Mar 24, 2017

Scripted Function (Macro) Code

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using System; using System.Drawing; using System.Windows.Forms; using System.Threading; using System.Collections.Generic; using System.Runtime.InteropServices; // The 'windowHandle' parameter will contain the window handle for the: // - Active window when run by hotkey // - Window Location target when run by a Window Location rule // - TitleBar Button owner when run by a TitleBar Button // - Jump List owner when run from a Taskbar Jump List // - Currently focused window if none of these match public static class DisplayFusionFunction { private static readonly string SettingName = "ActivlyDimUnusedWindows_TransparentForm_Running"; public static void Run(IntPtr windowHandle) { //toggle the setting from running to not running, and vice versa ToggleSetting(); //check to see if we should exit bool isExiting = !IsTransparentWindowRunning(); //if we are exiting, exit if(isExiting) return; //add forms for each monitor except the used one List<Form> forms = new List<Form>(); foreach(uint id in BFS.Monitor.GetMonitorIDs()) forms.Add(new TransparentForm(40m, id)); try { //this will open the forms we added to the list by using our custom application context Application.Run(new MultipleFormApplicationContext(windowHandle, forms)); } catch (Exception ex) { BFS.Dialog.ShowMessageError(ex.Message); } } //this function toggles the script settings from running to not running private static void ToggleSetting() { string status = BFS.ScriptSettings.ReadValue(SettingName); if(status.Equals("running", StringComparison.Ordinal)) BFS.ScriptSettings.WriteValue(SettingName, "not"); else BFS.ScriptSettings.WriteValue(SettingName, "running"); } //this function allows us to see the currect state of the script private static bool IsTransparentWindowRunning() { string status = BFS.ScriptSettings.ReadValue(SettingName); return status.Equals("running", StringComparison.Ordinal); } //extend the ApplicationContext class to support opening multiple forms //this class will also listen for active window changes, and move the forms around private class MultipleFormApplicationContext : ApplicationContext { //this is the function signature for the hook callback private delegate void WinEventProcDelegate(IntPtr hWinEventHook, uint e, IntPtr hwnd, int idObject, int idChild, uint dwEventThread, uint dwmsEventTime); //this function will let us listen to windows events [DllImport("User32.dll")] private static extern IntPtr SetWinEventHook(uint eventMin, uint eventMax, IntPtr hmodWinEventProc, WinEventProcDelegate lpfnWinEventProc, uint idProcess, uint idThread, uint dwflags); //this function will let us stop listening to windows events [DllImport("User32.dll")] private static extern bool UnhookWinEvent(IntPtr hWinEventHook); [DllImport("User32.dll")] private static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int x, int y, int cx, int cy, uint uFlags); private IntPtr WindowChangedHookHandle; private WinEventProcDelegate HookDelegateReference; private List<Form> Forms; private const uint EVENT_SYSTEM_MOVESIZEEND = 0x000B; private const uint EVENT_SYSTEM_FOREGROUND = 0x0003; private const uint SWP_NOACTIVATE = 0x0010; private const uint SWP_NOMOVE = 0x0002; private const uint SWP_NOSIZE = 0x0001; internal MultipleFormApplicationContext(IntPtr currentWindow, List<Form> forms) { this.Forms = forms; //store the reference to the function so .NET doesn't feel like disposing it this.HookDelegateReference = this.WindowChanged; //start the window hook this.WindowChangedHookHandle = SetWinEventHook(EVENT_SYSTEM_FOREGROUND, EVENT_SYSTEM_FOREGROUND, IntPtr.Zero, this.HookDelegateReference, 0, 0, 0); //open each of the forms, and add our closing event to them foreach(Form form in forms) { form.FormClosed += this.OnFormClosed; form.Show(); } this.RepositionForms(currentWindow); } //when all the forms close, make sure to exit the application private void OnFormClosed(object sender, EventArgs e) { try { if(Application.OpenForms.Count != 0) return; //release the window hooks and exit the application if(this.WindowChangedHookHandle != IntPtr.Zero) UnhookWinEvent(this.WindowChangedHookHandle); this.HookDelegateReference = null; this.ExitThread(); } catch //ignore any errors { } } private void RepositionForms(IntPtr window) { try { if(BFS.Window.GetAlwaysOnTop(window)) { //loop through each form and put them behind the topmost windows foreach(Form form in this.Forms) SetWindowPos(form.Handle, IntPtr.Zero, 0, 0, 0, 0, (SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE)); } else { //make sure the focused window is on the top of the z order SetWindowPos(window, IntPtr.Zero, 0, 0, 0, 0, (SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE)); //loop through each form and put them behind the window foreach(Form form in this.Forms) SetWindowPos(form.Handle, window, 0, 0, 0, 0, (SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE)); } } catch //ignore any errors { } } private void WindowChanged(IntPtr hWinEventHook, uint e, IntPtr hwnd, int idObject, int idChild, uint dwEventThread, uint dwmsEventTime) { try { this.RepositionForms(hwnd); } catch //ignore any errors { } } } //extend the Form class to get the behavior we want private class TransparentForm : Form { //this will tell us what transparency to use private decimal Transparency; //a variable to store the monitor id this form is on private uint MonitorId; //the contructor for our class internal TransparentForm(decimal transparency, uint id) { this.Transparency = transparency; this.MonitorId = id; this.SuspendLayout(); //setup the layout of this form this.BackColor = Color.Black; this.FormBorderStyle = FormBorderStyle.None; this.ShowInTaskbar = false; //setup the form load event this.Load += Form_Load; this.ResumeLayout(false); } private void Form_Load(object sender, EventArgs e) { //make the window transparent BFS.Window.SetTransparency(this.Handle, this.Transparency); //add a windows style to the current style that will //tell this window to ignore user input uint style = (uint)BFS.Window.GetWindowStyleEx(this.Handle); BFS.Window.SetWindowStyleEx((BFS.WindowEnum.WindowStyleEx)(style | (uint)BFS.WindowEnum.WindowStyleEx.WS_EX_TRANSPARENT | (uint)BFS.WindowEnum.WindowStyleEx.WS_EX_LAYERED), this.Handle); //set the form's bounds to the monitor this.Bounds = BFS.Monitor.GetMonitorBoundsByID(this.MonitorId); //start up a thread to listen for an exit event new Thread(new ThreadStart(ExitListener)).Start(); } private void ExitListener() { try { while(true) { //if we should close, tell the main thread to close the form if(!IsTransparentWindowRunning()) { try { this.Invoke((MethodInvoker) delegate { this.Close(); }); } catch //something went wrong, ignore { } break; } //sleep for a quarter of a second BFS.General.ThreadWait(500); } } catch //ignore errors { } } } }