Give context back to transient parent window

Signed-off-by: falkTX <falktx@falktx.com>

dgl/src/WindowPrivateData.cpp

@@ -79,6 +79,7 @@ Window::PrivateData::PrivateData(Application& a, Window* const s)
       appData(a.pData),
       self(s),
       view(puglNewView(appData->world)),
+      transientParentView(nullptr),
       topLevelWidgets(),
       isClosed(true),
       isVisible(false),
@@ -102,6 +103,7 @@ Window::PrivateData::PrivateData(Application& a, Window* const s, PrivateData* c
       appData(a.pData),
       self(s),
       view(puglNewView(appData->world)),
+      transientParentView(ppData->view),
       topLevelWidgets(),
       isClosed(true),
       isVisible(false),
@@ -117,9 +119,10 @@ Window::PrivateData::PrivateData(Application& a, Window* const s, PrivateData* c
 #endif
       modal(ppData)
 {
-    initPre(DEFAULT_WIDTH, DEFAULT_HEIGHT, false);
+    puglBackendLeave(transientParentView);
+    puglSetTransientFor(view, puglGetNativeWindow(transientParentView));
 
-    puglSetTransientFor(view, puglGetNativeWindow(ppData->view));
+    initPre(DEFAULT_WIDTH, DEFAULT_HEIGHT, false);
 }
 
 Window::PrivateData::PrivateData(Application& a, Window* const s,
@@ -129,6 +132,7 @@ Window::PrivateData::PrivateData(Application& a, Window* const s,
       appData(a.pData),
       self(s),
       view(puglNewView(appData->world)),
+      transientParentView(nullptr),
       topLevelWidgets(),
       isClosed(parentWindowHandle == 0),
       isVisible(parentWindowHandle != 0),
@@ -158,6 +162,7 @@ Window::PrivateData::PrivateData(Application& a, Window* const s,
       appData(a.pData),
       self(s),
       view(puglNewView(appData->world)),
+      transientParentView(nullptr),
       topLevelWidgets(),
       isClosed(parentWindowHandle == 0),
       isVisible(parentWindowHandle != 0),
@@ -242,6 +247,10 @@ void Window::PrivateData::initPost()
         appData->oneWindowShown();
         puglShow(view);
     }
+
+    // give context back to transient parent window
+    if (transientParentView != nullptr)
+        puglBackendEnter(transientParentView);
 }
 
 // -----------------------------------------------------------------------

dgl/src/WindowPrivateData.hpp

@@ -44,6 +44,9 @@ struct Window::PrivateData : IdleCallback {
     /** Pugl view instance. */
     PuglView* const view;
 
+    /** Pugl view instance of the transient parent window. */
+    PuglView* const transientParentView;
+
     /** Reserved space for graphics context. */
     mutable uint8_t graphicsContext[sizeof(void*)];
 

dgl/src/pugl.cpp

@@ -177,10 +177,18 @@ void puglClearMinSize(PuglView* const view)
     view->minHeight = 0;
 }
 
+// --------------------------------------------------------------------------------------------------------------------
+// missing in pugl, directly returns transient parent
+
+PuglNativeView puglGetTransientParent(const PuglView* const view)
+{
+    return view->transientParent;
+}
+
 // --------------------------------------------------------------------------------------------------------------------
 // missing in pugl, directly returns title char* pointer
 
-const char* puglGetWindowTitle(const PuglView* view)
+const char* puglGetWindowTitle(const PuglView* const view)
 {
     return view->title;
 }

dgl/src/pugl.hpp

@@ -54,6 +54,10 @@ puglBackendLeave(PuglView* view);
 PUGL_API void
 puglClearMinSize(PuglView* view);
 
+// missing in pugl, directly returns transient parent
+PUGL_API PuglNativeView
+puglGetTransientParent(const PuglView* view);
+
 // missing in pugl, directly returns title char* pointer
 PUGL_API const char*
 puglGetWindowTitle(const PuglView* view);