Merge pull request #2 from LORD-MicroStrain/feature/force_window

Modified default behavior of ImGui::Begin() to incorporate new window…

imgui.cpp

@@ -4939,7 +4939,7 @@ static void AddWindowToDrawData(ImGuiWindow* window, int layer)
 
 static inline int GetWindowDisplayLayer(ImGuiWindow* window)
 {
-    return (window->Flags & ImGuiWindowFlags_Tooltip) ? 1 : 0;
+    return (window->Flags & ImGuiWindowFlags_Tooltip)? 1 : 0;
 }
 
 // Layer is locked for the root window, however child windows may use a different viewport (e.g. extruding menu)
@@ -5868,7 +5868,9 @@ static ImVec2 CalcWindowAutoFitSize(ImGuiWindow* window, const ImVec2& size_cont
     const float decoration_h_without_scrollbars = window->DecoOuterSizeY1 + window->DecoOuterSizeY2 - window->ScrollbarSizes.y;
     ImVec2 size_pad = window->WindowPadding * 2.0f;
     ImVec2 size_desired = size_contents + size_pad + ImVec2(decoration_w_without_scrollbars, decoration_h_without_scrollbars);
-    if (window->Flags & ImGuiWindowFlags_Tooltip)
+
+    //Microstrain custom!
+    if ((window->Flags & ImGuiWindowFlags_Tooltip) || (window->Flags & ImGuiWindowFlags_Always_New_Window))
     {
         // Tooltip always resize
         return size_desired;
@@ -6867,8 +6869,9 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
             window->Pos = FindBestWindowPosForPopup(window);
 
         // Late create viewport if we don't fit within our current host viewport.
+        //Microstrain custom!
         if (window->ViewportAllowPlatformMonitorExtend >= 0 && !window->ViewportOwned && !(window->Viewport->Flags & ImGuiViewportFlags_IsMinimized))
-            if (!window->Viewport->GetMainRect().Contains(window->Rect()))
+            if (!window->Viewport->GetMainRect().Contains(window->Rect()) || (flags & ImGuiWindowFlags_Always_New_Window))
             {
                 // This is based on the assumption that the DPI will be known ahead (same as the DPI of the selection done in UpdateSelectWindowViewport)
                 //ImGuiViewport* old_viewport = window->Viewport;
@@ -10694,7 +10697,8 @@ bool ImGui::BeginTooltipEx(ImGuiTooltipFlags tooltip_flags, ImGuiWindowFlags ext
                 SetWindowHiddendAndSkipItemsForCurrentFrame(window);
                 ImFormatString(window_name, IM_ARRAYSIZE(window_name), "##Tooltip_%02d", ++g.TooltipOverrideCount);
             }
-    ImGuiWindowFlags flags = ImGuiWindowFlags_Tooltip | ImGuiWindowFlags_NoInputs | ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoSavedSettings | ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoDocking;
+    //Microstrain custom!
+    ImGuiWindowFlags flags = ImGuiWindowFlags_Always_New_Window | ImGuiWindowFlags_Tooltip | ImGuiWindowFlags_NoInputs | ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoSavedSettings | ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoDocking;
     Begin(window_name, NULL, flags | extra_window_flags);
     // 2023-03-09: Added bool return value to the API, but currently always returning true.
     // If this ever returns false we need to update BeginDragDropSource() accordingly.
@@ -14466,8 +14470,10 @@ void ImGui::WindowSyncOwnedViewport(ImGuiWindow* window, ImGuiWindow* parent_win
     ImGuiViewportFlags viewport_flags = window->Viewport->Flags & ~viewport_flags_to_clear;
     ImGuiWindowFlags window_flags = window->Flags;
     const bool is_modal = (window_flags & ImGuiWindowFlags_Modal) != 0;
-    const bool is_short_lived_floating_window = (window_flags & (ImGuiWindowFlags_ChildMenu | ImGuiWindowFlags_Tooltip | ImGuiWindowFlags_Popup)) != 0;
-    if (window_flags & ImGuiWindowFlags_Tooltip)
+
+    //Microstrain custom!
+    const bool is_short_lived_floating_window = (window_flags & (ImGuiWindowFlags_ChildMenu | ImGuiWindowFlags_Tooltip | ImGuiWindowFlags_Popup | ImGuiWindowFlags_Always_New_Window)) != 0;
+    if ((window_flags & ImGuiWindowFlags_Tooltip) || (window_flags & ImGuiWindowFlags_Always_New_Window))
         viewport_flags |= ImGuiViewportFlags_TopMost;
     if ((g.IO.ConfigViewportsNoTaskBarIcon || is_short_lived_floating_window) && !is_modal)
         viewport_flags |= ImGuiViewportFlags_NoTaskBarIcon;

imgui.h

@@ -1031,6 +1031,9 @@ enum ImGuiWindowFlags_
     ImGuiWindowFlags_Modal                  = 1 << 27,  // Don't use! For internal use by BeginPopupModal()
     ImGuiWindowFlags_ChildMenu              = 1 << 28,  // Don't use! For internal use by BeginMenu()
     ImGuiWindowFlags_DockNodeHost           = 1 << 29,  // Don't use! For internal use by Begin()/NewFrame()
+
+    // [Microstrain Custom!]
+    ImGuiWindowFlags_Always_New_Window      = 1 << 30,  // Microstrain Custom!!!
 };
 
 // Flags for ImGui::InputText()