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glarea: Display the error message when an error occurred

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Simply center a PangoLayout with the message text.
This commit is contained in:
Benjamin Otte 2014-10-16 03:31:30 +02:00
parent 672a67d0af
commit 44c8df62f2
1 changed files with 36 additions and 2 deletions
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38
gtk/gtkglarea.c
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@ -26,6 +26,8 @@
#include "gtkstylecontext.h"
#include "gtkmarshalers.h"
#include "gtkprivate.h"
#include "gtkrender.h"
#include <epoxy/gl.h>
/**
@ -117,6 +119,7 @@
typedef struct {
GdkGLContext *context;
GError *error;
GLuint framebuffer;
gboolean has_alpha;
gboolean has_depth_buffer;
@ -216,7 +219,7 @@ gtk_gl_area_realize (GtkWidget *widget)
window = gtk_widget_get_window (widget);
priv->context = gdk_window_create_gl_context (window,
GDK_GL_PROFILE_DEFAULT,
NULL);
&priv->error);
if (priv->context != NULL)
{
gdk_gl_context_make_current (priv->context);
@ -247,6 +250,8 @@ gtk_gl_area_unrealize (GtkWidget *widget)
gdk_gl_context_clear_current ();
}
g_clear_error (&priv->error);
GTK_WIDGET_CLASS (gtk_gl_area_parent_class)->unrealize (widget);
}
@ -257,6 +262,29 @@ gtk_gl_area_size_allocate (GtkWidget *widget,
GTK_WIDGET_CLASS (gtk_gl_area_parent_class)->size_allocate (widget, allocation);
}
static void
gtk_gl_area_draw_error_screen (GtkGLArea *self,
cairo_t *cr,
gint width,
gint height)
{
GtkGLAreaPrivate *priv = gtk_gl_area_get_instance_private (self);
PangoLayout *layout;
int layout_height;
layout = gtk_widget_create_pango_layout (GTK_WIDGET (self),
priv->error->message);
pango_layout_set_width (layout, width * PANGO_SCALE);
pango_layout_set_alignment (layout, PANGO_ALIGN_CENTER);
pango_layout_get_pixel_size (layout, NULL, &layout_height);
gtk_render_layout (gtk_widget_get_style_context (GTK_WIDGET (self)),
cr,
0, (height - layout_height) / 2,
layout);
g_object_unref (layout);
}
static gboolean
gtk_gl_area_draw (GtkWidget *widget,
cairo_t *cr)
@ -269,7 +297,13 @@ gtk_gl_area_draw (GtkWidget *widget,
GLenum status;
if (priv->context == NULL)
return FALSE;
{
gtk_gl_area_draw_error_screen (self,
cr,
gtk_widget_get_allocated_width (widget),
gtk_widget_get_allocated_height (widget));
return FALSE;
}
gtk_gl_area_make_current (self);