Fixed 1185718: ImGUI blocks text events to text fields in UI

imgui.cpp

@@ -3113,6 +3113,7 @@ void ImGui::SetActiveID(ImGuiID id, ImGuiWindow* window)
     g.ActiveId = id;
     g.ActiveIdAllowOverlap = false;
     g.ActiveIdNoClearOnFocusLoss = false;
+    g.ActiveIdWindowIsJustChanged = (g.ActiveIdWindow != window);
     g.ActiveIdWindow = window;
     g.ActiveIdHasBeenEditedThisFrame = false;
     if (id)
@@ -3930,7 +3931,9 @@ void ImGui::UpdateHoveredWindowAndCaptureFlags()
         g.IO.WantCaptureKeyboard = true;
 
     // Update io.WantTextInput flag, this is to allow systems without a keyboard (e.g. mobile, hand-held) to show a software keyboard if possible
+    const bool oldWantTextInput = g.IO.WantTextInput;
     g.IO.WantTextInput = (g.WantTextInputNextFrame != -1) ? (g.WantTextInputNextFrame != 0) : false;
+    g.IO.WantTextInputIsJustChanged = (g.IO.WantTextInput != oldWantTextInput);
 }
 
 ImGuiKeyModFlags ImGui::GetMergedKeyModFlags()

imgui.h

@@ -1865,6 +1865,7 @@ struct ImGuiIO
     bool        WantCaptureMouse;               // Set when Dear ImGui will use mouse inputs, in this case do not dispatch them to your main game/application (either way, always pass on mouse inputs to imgui). (e.g. unclicked mouse is hovering over an imgui window, widget is active, mouse was clicked over an imgui window, etc.).
     bool        WantCaptureKeyboard;            // Set when Dear ImGui will use keyboard inputs, in this case do not dispatch them to your main game/application (either way, always pass keyboard inputs to imgui). (e.g. InputText active, or an imgui window is focused and navigation is enabled, etc.).
     bool        WantTextInput;                  // Mobile/console: when set, you may display an on-screen keyboard. This is set by Dear ImGui when it wants textual keyboard input to happen (e.g. when a InputText widget is active).
+    bool        WantTextInputIsJustChanged;     // Set when WantTextInput is changed.
     bool        WantSetMousePos;                // MousePos has been altered, backend should reposition mouse on next frame. Rarely used! Set only when ImGuiConfigFlags_NavEnableSetMousePos flag is enabled.
     bool        WantSaveIniSettings;            // When manual .ini load/save is active (io.IniFilename == NULL), this will be set to notify your application that you can call SaveIniSettingsToMemory() and save yourself. Important: clear io.WantSaveIniSettings yourself after saving!
     bool        NavActive;                      // Keyboard/Gamepad navigation is currently allowed (will handle ImGuiKey_NavXXX events) = a window is focused and it doesn't use the ImGuiWindowFlags_NoNavInputs flag.

imgui_internal.h

@@ -1460,6 +1460,7 @@ struct ImGuiContext
     ImU64                   ActiveIdUsingKeyInputMask;          // Active widget will want to read those key inputs. When we grow the ImGuiKey enum we'll need to either to order the enum to make useful keys come first, either redesign this into e.g. a small array.
     ImVec2                  ActiveIdClickOffset;                // Clicked offset from upper-left corner, if applicable (currently only set by ButtonBehavior)
     ImGuiWindow*            ActiveIdWindow;
+    bool                    ActiveIdWindowIsJustChanged;
     ImGuiInputSource        ActiveIdSource;                     // Activating with mouse or nav (gamepad/keyboard)
     int                     ActiveIdMouseButton;
     ImGuiID                 ActiveIdPreviousFrame;
@@ -1692,6 +1693,7 @@ struct ImGuiContext
         ActiveIdUsingKeyInputMask = 0x00;
         ActiveIdClickOffset = ImVec2(-1, -1);
         ActiveIdWindow = NULL;
+        ActiveIdWindowIsJustChanged = false;
         ActiveIdSource = ImGuiInputSource_None;
         ActiveIdMouseButton = -1;
         ActiveIdPreviousFrame = 0;