Hi
could you please provide a working version of this application?
many thanks
Attilio
Dennis Hall ha scritto:
> I'm having trouble with refresh when I used either Pango or Cairo calls with
> GTK over Direct FB. I've modified the scribble.c sample so that some test
> text is drawn using pango when a button pressed or a movement event occurs
> but I don't see the text unless I press the meta key (or windows key
> depending on the keyboard) and move the entire region. It looks like this
> causes the whole drawing area to be refreshed.
>
> Can anyone explain the concepts or have documentation pointers or better yet
> a fix for this problem?
>
> gint col_select = 0;
> char *szText = "Test String";
> int lenText = 11;
>
> /* Draw a rectangle on the screen */
> static void draw_brush( GtkWidget *widget,
> gdouble x,
> gdouble y)
> {
> GdkRectangle update_rect;
> GdkColor fgColor;
>
> update_rect.x = x - 5;
> update_rect.y = y - 5;
> update_rect.width = RECT_WIDTH;
> update_rect.height = RECT_HEIGHT;
>
> gdk_color_parse(colorStrings[col_select], &fgColor);
>
> gint col_select = 0;
> char *szText = "Test String";
> int lenText = 11;
>
> /* Draw a rectangle on the screen */
> static void draw_brush( GtkWidget *widget,
> gdouble x,
> gdouble y)
> {
> GdkRectangle update_rect;
> GdkColor fgColor;
>
> update_rect.x = x - 5;
> update_rect.y = y - 5;
> update_rect.width = RECT_WIDTH;
> update_rect.height = RECT_HEIGHT;
>
> gdk_color_parse(colorStrings[col_select], &fgColor);
>
>
>
> GdkWindow* root = gdk_get_default_root_window();
> GdkGC* cg = gdk_gc_new(root);
>
> PangoLayout *pLayout = gtk_widget_create_pango_layout( widget, 0);
> pango_layout_set_text(pLayout, szText, /* lenText */ -1);
>
> if (!gdk_colormap_alloc_color(
> gdk_colormap_get_system (),
> &fgColor, TRUE, TRUE)
> ) {/*ERROR: NO gdk_colormap_alloc_color*/}
>
> gdk_draw_layout_with_colors( widget->window ,
> cg,
> x+2, y+2,
> pLayout,
> &fgColor /* NULL */,
> NULL
> );
>
> g_object_unref(pLayout);
>
> gdk_draw_rectangle (pixmap,
> widget->style->black_gc,
> TRUE,
> update_rect.x, update_rect.y,
> update_rect.width, update_rect.height);
>
> gtk_widget_queue_draw_area (widget,
> update_rect.x, update_rect.y,
> update_rect.width, update_rect.height);
>
> if (col_select==MAX_COL_STRINGS)
> col_select = 0;
> else
> col_select++;
>
> }
>
> static gboolean button_press_event( GtkWidget *widget,
> GdkEventButton *event )
> {
> if (event->button == 1 && pixmap != NULL)
> draw_brush (widget, event->x, event->y);
>
> return TRUE;
> }
>
>
> _______________________________________________
> gtk-app-devel-list mailing list
> gtk-app-devel-list@gnome.org
> http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
>
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