[Emacs-diffs] scratch/hidpi 6c1a219: Get positions of menus and tooltips right on HiDPI

[Lars Ingebrigtsen]

branch: scratch/hidpi
commit 6c1a2195d464934711fe4decb0ccfcaa07c55bb7
Author: Lars Ingebrigtsen <address@hidden>
Commit: Lars Ingebrigtsen <address@hidden>

    Get positions of menus and tooltips right on HiDPI
    
    * src/gtkutil.c (xg_get_scale): New function.
    (xg_show_tooltip): Use it.
    
    * src/xmenu.c (create_and_show_popup_menu): Put menus in the
    right place.
---
 src/gtkutil.c | 11 ++++++++++-
 src/gtkutil.h |  1 +
 src/xmenu.c   |  5 +++++
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/gtkutil.c b/src/gtkutil.c
index 2d4abef..2550915 100644
--- a/src/gtkutil.c
+++ b/src/gtkutil.c
@@ -204,6 +204,14 @@ xg_display_open (char *display_name, Display **dpy)
   *dpy = gdpy ? GDK_DISPLAY_XDISPLAY (gdpy) : NULL;
 }
 
+/* Scaling/HiDPI functions. */
+int
+xg_get_scale (struct frame *f)
+{
+  if (FRAME_VISIBLE_P (f) && FRAME_GTK_WIDGET (f))
+    return gtk_widget_get_scale_factor (FRAME_GTK_WIDGET (f));
+  return 1;
+}
 
 /* Close display DPY.  */
 
@@ -724,7 +732,8 @@ xg_show_tooltip (struct frame *f, int root_x, int root_y)
   if (x->ttip_window)
     {
       block_input ();
-      gtk_window_move (x->ttip_window, root_x, root_y);
+      gtk_window_move (x->ttip_window, root_x / xg_get_scale (f),
+                      root_y / xg_get_scale (f));
       gtk_widget_show_all (GTK_WIDGET (x->ttip_window));
       unblock_input ();
     }
diff --git a/src/gtkutil.h b/src/gtkutil.h
index 0abcb06..a252cbe 100644
--- a/src/gtkutil.h
+++ b/src/gtkutil.h
@@ -156,6 +156,7 @@ extern void xg_frame_resized (struct frame *f,
 extern void xg_frame_set_char_size (struct frame *f, int width, int height);
 extern GtkWidget * xg_win_to_widget (Display *dpy, Window wdesc);
 
+extern int xg_get_scale (struct frame *f);
 extern void xg_display_open (char *display_name, Display **dpy);
 extern void xg_display_close (Display *dpy);
 extern GdkCursor * xg_create_default_cursor (Display *dpy);
diff --git a/src/xmenu.c b/src/xmenu.c
index 6c8a0c5..64df151 100644
--- a/src/xmenu.c
+++ b/src/xmenu.c
@@ -1271,6 +1271,11 @@ create_and_show_popup_menu (struct frame *f, 
widget_value *first_wv,
 
                              /* Child of win.  */
                              &dummy_window);
+#ifdef HAVE_GTK3
+      /* Use window scaling factor to adjust position for hidpi screens. */
+      x /= xg_get_scale (f);
+      y /= xg_get_scale (f);
+#endif
       unblock_input ();
       popup_x_y.x = x;
       popup_x_y.y = y;