From 3d27fe91f5c25405df0d332f17a7c6fc97d7da27 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Sat, 1 Nov 2014 00:48:15 +0100
Subject: Add support for transient child windows.

No Windows support currently.

Conflicts:
	pugl/pugl.h
	pugl/pugl_osx.m
	pugl/pugl_win.cpp
	pugl/pugl_x11.c
---
 pugl/pugl.h          |  9 +++++++++
 pugl/pugl_internal.h |  7 +++++++
 pugl/pugl_osx.m      | 30 ++++++++++++++++++------------
 pugl/pugl_x11.c      |  5 +++++
 4 files changed, 39 insertions(+), 12 deletions(-)

diff --git a/pugl/pugl.h b/pugl/pugl.h
index 54b4c78..53115ff 100644
--- a/pugl/pugl.h
+++ b/pugl/pugl.h
@@ -176,6 +176,15 @@ puglInitWindowMinSize(PuglView* view, int width, int height);
 PUGL_API void
 puglInitResizable(PuglView* view, bool resizable);
 
+/**
+   Set transient parent before creating a window.
+
+   On X11, parent_id must be a Window.
+   On OSX, parent_id must be an NSView*.
+*/
+PUGL_API void
+puglInitTransientFor(PuglView* view, uintptr_t parent);
+
 /**
    Set the context type before creating a window.
 */
diff --git a/pugl/pugl_internal.h b/pugl/pugl_internal.h
index 8a193d6..5b2b1c7 100644
--- a/pugl/pugl_internal.h
+++ b/pugl/pugl_internal.h
@@ -49,6 +49,7 @@ struct PuglViewImpl {
 
 	PuglNativeWindow parent;
 	PuglContextType  ctx_type;
+	uintptr_t        transient_parent;
 
 	int      width;
 	int      height;
@@ -110,6 +111,12 @@ puglInitResizable(PuglView* view, bool resizable)
 	view->resizable = resizable;
 }
 
+void
+puglInitTransientFor(PuglView* view, uintptr_t parent)
+{
+	view->transient_parent = parent;
+}
+
 void
 puglInitContextType(PuglView* view, PuglContextType type)
 {
diff --git a/pugl/pugl_osx.m b/pugl/pugl_osx.m
index 6139837..8735a6d 100644
--- a/pugl/pugl_osx.m
+++ b/pugl/pugl_osx.m
@@ -59,7 +59,6 @@
 	}
 
 	[self setAcceptsMouseMovedEvents:YES];
-	[self setLevel: CGShieldingWindowLevel() + 1];
 	return (PuglWindow*)self;
 }
 
@@ -445,17 +444,24 @@ puglCreateWindow(PuglView* view, const char* title)
 	[NSAutoreleasePool new];
 	impl->app = [NSApplication sharedApplication];
 
-	NSString* titleString = [[NSString alloc]
-		                        initWithBytes:title
-		                               length:strlen(title)
-		                             encoding:NSUTF8StringEncoding];
-
-	id window = [[PuglWindow new] retain];
-
-	[window setPuglview:view];
-	[window setTitle:titleString];
-	if (view->min_width || view->min_height) {
-		[window setContentMinSize:NSMakeSize(view->min_width, view->min_height)];
+	if (view->transient_parent) {
+		NSView* pview = (NSView*)view->transient_parent;
+		[pview addSubview:impl->glview];
+		[impl->glview setHidden:NO];
+		[impl->glview setLevel: CGShieldingWindowLevel() + 1];
+	} else {
+		NSString* titleString = [[NSString alloc]
+			                        initWithBytes:title
+			                               length:strlen(title)
+			                             encoding:NSUTF8StringEncoding];
+
+		id window = [[RobTKPuglWindow new] retain];
+		[window setPuglview:view];
+		[window setTitle:titleString];
+		if (view->min_width || view->min_height) {
+			[window setContentMinSize:NSMakeSize(min_width, min_height)];
+		}
+		impl->window = window;
 	}
 
 	impl->glview           = [PuglOpenGLView new];
diff --git a/pugl/pugl_x11.c b/pugl/pugl_x11.c
index e3325cd..4bf1f65 100644
--- a/pugl/pugl_x11.c
+++ b/pugl/pugl_x11.c
@@ -226,6 +226,11 @@ puglCreateWindow(PuglView* view, const char* title)
 		XSetWMProtocols(impl->display, impl->win, &wmDelete, 1);
 	}
 
+	if (view->transient_parent) {
+		XSetTransientForHint(impl->display, impl->win,
+		                     (Window)(view->transient_parent));
+	}
+
 	XFree(vi);
 
 	return 0;
-- 
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