[gthumb] video player: fixed transparent video background

[Paolo Bacchilega <paobac src gnome org>]

commit b6dfdba9606dce3fb140849c7d0998145a8e0969
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Thu Aug 14 14:57:46 2014 +0200

    video player: fixed transparent video background

 extensions/gstreamer_tools/gth-media-viewer-page.c |   12 +++++++++++-
 gthumb/resources/gthumb.css                        |    6 ++++++
 2 files changed, 17 insertions(+), 1 deletions(-)
---
diff --git a/extensions/gstreamer_tools/gth-media-viewer-page.c 
b/extensions/gstreamer_tools/gth-media-viewer-page.c
index aa859fb..2111925 100644
--- a/extensions/gstreamer_tools/gth-media-viewer-page.c
+++ b/extensions/gstreamer_tools/gth-media-viewer-page.c
@@ -76,6 +76,7 @@ struct _GthMediaViewerPagePrivate {
        gboolean        cursor_visible;
        GthScreensaver *screensaver;
        GtkWidget      *screenshot_button;
+       gboolean        background_painted;
 };
 
 
@@ -138,6 +139,8 @@ video_area_realize_cb (GtkWidget *widget,
        self->priv->caption_layout = gtk_widget_create_pango_layout (widget, "");
        pango_layout_set_alignment (self->priv->caption_layout, PANGO_ALIGN_CENTER);
        _gth_media_viewer_page_update_caption (self);
+
+       self->priv->background_painted = FALSE;
 }
 
 
@@ -174,7 +177,7 @@ video_area_draw_cb (GtkWidget *widget,
        GtkAllocation       allocation;
        GtkStyleContext    *style_context;
 
-       if (self->priv->xwin_assigned && self->priv->has_video)
+       if (self->priv->xwin_assigned && self->priv->has_video && self->priv->background_painted)
                return FALSE;
 
        gtk_widget_get_allocation (widget, &allocation);
@@ -238,6 +241,8 @@ video_area_draw_cb (GtkWidget *widget,
                cairo_fill (cr);
        }
 
+       self->priv->background_painted = TRUE;
+
        return TRUE;
 }
 
@@ -630,6 +635,8 @@ gth_media_viewer_page_real_activate (GthViewerPage *base,
 
        self->priv->area = gtk_drawing_area_new ();
 
+       gtk_style_context_add_class (gtk_widget_get_style_context (self->priv->area), "video-player");
+
        /* do not use the rgba visual on the drawing area */
        {
                GdkVisual *visual;
@@ -1005,6 +1012,7 @@ gth_media_viewer_page_real_show (GthViewerPage *base)
        GthMediaViewerPage *self = GTH_MEDIA_VIEWER_PAGE (base);
 
        self->priv->visible = TRUE;
+       self->priv->background_painted = FALSE;
        gth_viewer_page_focus (GTH_VIEWER_PAGE (self));
 
        create_playbin (self);
@@ -1072,6 +1080,7 @@ gth_media_viewer_page_real_view (GthViewerPage *base,
        self->priv->duration = 0;
        self->priv->has_audio = FALSE;
        self->priv->has_video = FALSE;
+       self->priv->background_painted = FALSE;
 
        _g_object_unref (self->priv->icon);
        self->priv->icon = NULL;
@@ -1273,6 +1282,7 @@ gth_media_viewer_page_init (GthMediaViewerPage *self)
        self->priv->screensaver = gth_screensaver_new (NULL);
        self->priv->visible = FALSE;
        self->priv->screenshot_button = NULL;
+       self->priv->background_painted = FALSE;
 }
 
 
diff --git a/gthumb/resources/gthumb.css b/gthumb/resources/gthumb.css
index ce3df98..11ba637 100644
--- a/gthumb/resources/gthumb.css
+++ b/gthumb/resources/gthumb.css
@@ -122,3 +122,9 @@ GtkLabel.extension-name {
 GtkLabel.extension-description {
        font-size: 80%;
 }
+
+/* -- video player -- */
+
+.video-player {
+       background-color: #000;
+}