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GTK+3: work with "draw" signal instead of "expose" in print preview 

adapted from
https://git.gnome.org/browse/gedit/commit?id=9453de86abac1cf1bf4702091944301ac800bdef

fixes https://github.com/mate-desktop/pluma/issues/47
This commit is contained in:
Monsta 2015-11-02 14:40:19 +03:00
parent e29b9b4c99
commit 385ec7a3f0
1 changed files with 26 additions and 2 deletions
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28
pluma/pluma-print-preview.c
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@ -1103,26 +1103,40 @@ draw_page (cairo_t *cr,
}
static gboolean
#if GTK_CHECK_VERSION (3, 0, 0)
preview_draw (GtkWidget *widget,
cairo_t *cr,
#else
preview_expose (GtkWidget *widget,
GdkEventExpose *event,
#endif
PlumaPrintPreview *preview)
{
PlumaPrintPreviewPrivate *priv;
GdkWindow *bin_window;
cairo_t *cr;
gint pg;
gint i, j;
priv = preview->priv;
bin_window = gtk_layout_get_bin_window (GTK_LAYOUT (priv->layout));
#if GTK_CHECK_VERSION (3, 0, 0)
if (!gtk_cairo_should_draw_window (cr, bin_window))
return TRUE;
cairo_save (cr);
gtk_cairo_transform_to_window (cr, widget, bin_window);
#else
if (event->window != bin_window)
return FALSE;
cr = gdk_cairo_create (bin_window);
cairo_t *cr = gdk_cairo_create (bin_window);
gdk_cairo_rectangle (cr, &event->area);
cairo_clip (cr);
#endif
/* get the first page to display */
pg = get_first_page_displayed (preview);
@ -1149,7 +1163,12 @@ preview_expose (GtkWidget *widget,
++pg;
}
}
#if GTK_CHECK_VERSION (3, 0, 0)
cairo_restore (cr);
#else
cairo_destroy (cr);
#endif
return TRUE;
}
@ -1205,8 +1224,13 @@ preview_ready (GtkPrintOperationPreview *gtk_preview,
/* let the default gtklayout handler clear the background */
g_signal_connect_after (preview->priv->layout,
#if GTK_CHECK_VERSION (3, 0, 0)
"draw",
G_CALLBACK (preview_draw),
#else
"expose-event",
G_CALLBACK (preview_expose),
#endif
preview);
gtk_widget_queue_draw (preview->priv->layout);