Added SetWindowFocus(), SetWindowFocus(const char*), SetNextWindowFocus() (#146)

imgui.cpp

@@ -1005,6 +1005,7 @@ struct ImGuiState
     ImGuiSetCondition       SetNextWindowSizeCond;
     bool                    SetNextWindowCollapsedVal;
     ImGuiSetCondition       SetNextWindowCollapsedCond;
+    bool                    SetNextWindowFocus;
 
     // Render
     ImVector<ImDrawList*>   RenderDrawLists;
@@ -1056,6 +1057,7 @@ struct ImGuiState
         SetNextWindowSizeCond = 0;
         SetNextWindowCollapsedVal = false;
         SetNextWindowCollapsedCond = 0;
+        SetNextWindowFocus = false;
 
         SliderAsInputTextId = 0;
         ActiveComboID = 0;
@@ -2704,6 +2706,11 @@ bool ImGui::Begin(const char* name, bool* p_opened, const ImVec2& size, float bg
         ImGui::SetWindowCollapsed(g.SetNextWindowCollapsedVal, g.SetNextWindowCollapsedCond);
         g.SetNextWindowCollapsedCond = 0;
     }
+    if (g.SetNextWindowFocus)
+    {
+        ImGui::SetWindowFocus();
+        g.SetNextWindowFocus = false;
+    }
 
     // Find parent
     ImGuiWindow* parent_window = (flags & ImGuiWindowFlags_ChildWindow) != 0 ? g.CurrentWindowStack[g.CurrentWindowStack.size()-2] : NULL;
@@ -3437,6 +3444,19 @@ void ImGui::SetWindowCollapsed(bool collapsed, ImGuiSetCondition cond)
     window->Collapsed = collapsed;
 }
 
+void ImGui::SetWindowFocus()
+{
+    ImGuiWindow* window = GetCurrentWindow();
+    FocusWindow(window);
+}
+
+void ImGui::SetWindowFocus(const char* name)
+{
+    ImGuiWindow* window = FindWindowByName(name);
+    if (window)
+        FocusWindow(window);
+}
+
 void ImGui::SetNextWindowPos(const ImVec2& pos, ImGuiSetCondition cond)
 {
     ImGuiState& g = *GImGui;
@@ -3458,6 +3478,12 @@ void ImGui::SetNextWindowCollapsed(bool collapsed, ImGuiSetCondition cond)
     g.SetNextWindowCollapsedCond = cond ? cond : ImGuiSetCondition_Always;
 }
 
+void ImGui::SetNextWindowFocus()
+{
+    ImGuiState& g = *GImGui;
+    g.SetNextWindowFocus = true;
+}
+
 ImVec2 ImGui::GetContentRegionMax()
 {
     ImGuiWindow* window = GetCurrentWindow();

imgui.h

@@ -177,12 +177,16 @@ namespace ImGui
     IMGUI_API ImVec2        GetWindowSize();                                                    // get current window position.
     IMGUI_API float         GetWindowWidth();
     IMGUI_API bool          GetWindowCollapsed();
+
     IMGUI_API void          SetNextWindowPos(const ImVec2& pos, ImGuiSetCondition cond = 0);    // set next window position - call before Begin().
     IMGUI_API void          SetNextWindowSize(const ImVec2& size, ImGuiSetCondition cond = 0);  // set next window size. set to ImVec2(0,0) to force an auto-fit.
     IMGUI_API void          SetNextWindowCollapsed(bool collapsed, ImGuiSetCondition cond = 0); // set next window collapsed state.
+    IMGUI_API void          SetNextWindowFocus();                                               // set next window to be focused / front-most
     IMGUI_API void          SetWindowPos(const ImVec2& pos, ImGuiSetCondition cond = 0);        // set current window position - call within Begin()/End(). may incur tearing.
     IMGUI_API void          SetWindowSize(const ImVec2& size, ImGuiSetCondition cond = 0);      // set current window size. set to ImVec2(0,0) to force an auto-fit. may incur tearing.
     IMGUI_API void          SetWindowCollapsed(bool collapsed, ImGuiSetCondition cond = 0);     // set current window collapsed state.
+    IMGUI_API void          SetWindowFocus();                                                   // set current window to be focused / front-most
+    IMGUI_API void          SetWindowFocus(const char* name);                                   // set named window to be focused / front-most
 
     IMGUI_API void          SetScrollPosHere();                                                 // adjust scrolling position to center into the current cursor position.
     IMGUI_API void          SetKeyboardFocusHere(int offset = 0);                               // focus keyboard on the next widget. Use positive 'offset' to access sub components of a multiple component widget.