Viewport: Coupling non-main viewport to one window. Viewport name derived from the window. Added ImGuiConfigFlags_PlatformNoTaskBar, off by default (aka re-established task-bars by default for now). (#1542)

examples/directx10_example/main.cpp

@@ -116,6 +116,7 @@ int main(int, char**)
     ImGui::CreateContext();
     ImGuiIO& io = ImGui::GetIO(); (void)io;
     io.ConfigFlags |= ImGuiConfigFlags_EnableViewports;
+    io.ConfigFlags |= ImGuiConfigFlags_PlatformNoTaskBar;
     //io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;  // Enable Keyboard Controls
 
     ImGui_ImplWin32_Init(hwnd);

examples/directx11_example/main.cpp

@@ -139,6 +139,7 @@ int main(int, char**)
     ImGui::CreateContext();
     ImGuiIO& io = ImGui::GetIO(); (void)io;
     io.ConfigFlags |= ImGuiConfigFlags_EnableViewports;
+    io.ConfigFlags |= ImGuiConfigFlags_PlatformNoTaskBar;
     //io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;  // Enable Keyboard Controls
 
     ImGui_ImplWin32_Init(hwnd);

examples/imgui_impl_glfw.cpp

@@ -317,7 +317,6 @@ static void ImGui_ImplGlfw_CreateViewport(ImGuiViewport* viewport)
     data->Window = glfwCreateWindow((int)viewport->Size.x, (int)viewport->Size.y, "No Title Yet", NULL, share_window);
     data->WindowOwned = true;
     viewport->PlatformHandle = (void*)data->Window;
-    viewport->Name = NULL;
     ImGui_ImplGlfw_InstallCallbacks(data->Window);
 }
 
@@ -358,7 +357,8 @@ static void ImGui_ImplGlfw_ShowWindow(ImGuiViewport* viewport)
 #if defined(_WIN32)
     // GLFW hack: Hide icon from task bar
     HWND hwnd = glfwGetWin32Window(data->Window);
-    if (viewport->Flags & ImGuiViewportFlags_NoDecoration)
+    ImGuiIO& io = ImGui::GetIO();
+    if (io.ConfigFlags & ImGuiConfigFlags_PlatformNoTaskBar)
     {
         LONG ex_style = ::GetWindowLong(hwnd, GWL_EXSTYLE);
         ex_style &= ~WS_EX_APPWINDOW;

examples/imgui_impl_sdl2.cpp

@@ -316,7 +316,8 @@ static void ImGui_ImplSDL2_ShowWindow(ImGuiViewport* viewport)
 
         // SDL hack: Hide icon from task bar
         // Note: SDL 2.0.6+ has a SDL_WINDOW_SKIP_TASKBAR flag which is supported under Windows but the way it create the window breaks our seamless transition.
-        if (viewport->Flags & ImGuiViewportFlags_NoDecoration)
+        ImGuiIO& io = ImGui::GetIO();
+        if (io.ConfigFlags & ImGuiConfigFlags_PlatformNoTaskBar)
         {
             LONG ex_style = ::GetWindowLong(hwnd, GWL_EXSTYLE);
             ex_style &= ~WS_EX_APPWINDOW;

examples/imgui_impl_win32.cpp

@@ -291,15 +291,18 @@ static void ImGui_ImplWin32_CreateViewport(ImGuiViewport* viewport)
     ImGuiPlatformDataWin32* data = IM_NEW(ImGuiPlatformDataWin32)();
     viewport->PlatformUserData = data;
 
-    if (viewport->Flags & ImGuiViewportFlags_NoDecoration)
+    ImGuiIO& io = ImGui::GetIO();
+    bool no_decoration = (viewport->Flags & ImGuiViewportFlags_NoDecoration) != 0;
+    bool no_task_bar = (io.ConfigFlags & ImGuiConfigFlags_PlatformNoTaskBar) != 0;
+    if (no_decoration)
     {
         data->DwStyle = WS_POPUP;
-        data->DwExStyle = 0;
+        data->DwExStyle = no_task_bar ? WS_EX_TOOLWINDOW : WS_EX_APPWINDOW;
     }
     else
     {
         data->DwStyle = WS_OVERLAPPEDWINDOW;
-        data->DwExStyle = WS_EX_TOOLWINDOW;
+        data->DwExStyle = no_task_bar ? WS_EX_TOOLWINDOW : WS_EX_APPWINDOW;
     }
 
     // Create window

examples/opengl3_example/main.cpp

@@ -36,6 +36,7 @@ int main(int, char**)
     ImGui::CreateContext();
     ImGuiIO& io = ImGui::GetIO(); (void)io;
     io.ConfigFlags |= ImGuiConfigFlags_EnableViewports;
+    io.ConfigFlags |= ImGuiConfigFlags_PlatformNoTaskBar;
     //io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;  // Enable Keyboard Controls
     //io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;   // Enable Gamepad Controls
 

examples/sdl_opengl3_example/main.cpp

@@ -38,6 +38,7 @@ int main(int, char**)
     ImGui::CreateContext();
     ImGuiIO& io = ImGui::GetIO(); (void)io;
     io.ConfigFlags |= ImGuiConfigFlags_EnableViewports;
+    io.ConfigFlags |= ImGuiConfigFlags_PlatformNoTaskBar;
     //io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;  // Enable Keyboard Controls
 
     ImGui_ImplSDL2_Init(window, gl_context);

examples/sdl_vulkan_example/main.cpp

@@ -345,6 +345,7 @@ int main(int, char**)
     ImGui::CreateContext();
     ImGuiIO& io = ImGui::GetIO(); (void)io;
     io.ConfigFlags |= ImGuiConfigFlags_EnableViewports;
+    io.ConfigFlags |= ImGuiConfigFlags_PlatformNoTaskBar;
     //io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;  // Enable Keyboard Controls
 
     ImGui_ImplVulkan_InitInfo init_info = {};

examples/vulkan_example/main.cpp

@@ -354,6 +354,7 @@ int main(int, char**)
     ImGui::CreateContext();
     ImGuiIO& io = ImGui::GetIO(); (void)io;
     io.ConfigFlags |= ImGuiConfigFlags_EnableViewports;
+    io.ConfigFlags |= ImGuiConfigFlags_PlatformNoTaskBar;
     //io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;  // Enable Keyboard Controls
 
     ImGui_ImplVulkan_InitInfo init_info = {};