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StScrollViewFade: Fix scrollbar size handling

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Only skip the areas of the scrollbars when they are invisible
and add take the horizontal scrollbar into account as well
when calculating the faded area.

https://bugzilla.gnome.org/show_bug.cgi?id=651866
This commit is contained in:
Adel Gadllah 2011-06-04 23:35:24 +02:00
parent 3765acc0a5
commit 620330db8f
1 changed files with 17 additions and 3 deletions
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20
src/st/st-scroll-view-fade.c
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@ -40,6 +40,7 @@ static const gchar *fade_glsl_shader =
"uniform float height;\n"
"uniform float width;\n"
"uniform float scrollbar_width;\n"
"uniform float scrollbar_height;\n"
"uniform float offset_bottom;\n"
"uniform float offset_top;\n"
"uniform bool rtl;\n"
@ -52,10 +53,10 @@ static const gchar *fade_glsl_shader =
" float ratio = 1.0;\n"
" float fade_bottom_start = height - offset_bottom;\n"
" float ratio_top = y / offset_top;\n"
" float ratio_bottom = (height - y)/(height - fade_bottom_start);\n"
" float ratio_bottom = (height - scrollbar_height - y)/(height - scrollbar_height - fade_bottom_start);\n"
" bool in_scroll_area = ((rtl && x > scrollbar_width) || (!rtl && x < (width - scrollbar_width)));\n"
" bool fade_top = y < offset_top && in_scroll_area;\n"
" bool fade_bottom = y > fade_bottom_start && in_scroll_area;\n"
" bool fade_bottom = y > fade_bottom_start && in_scroll_area && (y < (height - scrollbar_height));\n"
"\n"
" if (fade_top) {\n"
" ratio = ratio_top;\n"
@ -81,6 +82,7 @@ struct _StScrollViewFade
gint height_uniform;
gint width_uniform;
gint scrollbar_width_uniform;
gint scrollbar_height_uniform;
gint offset_top_uniform;
gint offset_bottom_uniform;
gint rtl_uniform;
@ -145,6 +147,8 @@ st_scroll_view_fade_pre_paint (ClutterEffect *effect)
cogl_program_get_uniform_location (self->program, "width");
self->scrollbar_width_uniform =
cogl_program_get_uniform_location (self->program, "scrollbar_width");
self->scrollbar_height_uniform =
cogl_program_get_uniform_location (self->program, "scrollbar_height");
self->rtl_uniform =
cogl_program_get_uniform_location (self->program, "rtl");
self->offset_top_uniform =
@ -177,6 +181,13 @@ st_scroll_view_fade_paint_target (ClutterOffscreenEffect *effect)
gdouble value, lower, upper, page_size;
ClutterActor *vscroll = st_scroll_view_get_vscroll_bar (ST_SCROLL_VIEW (self->actor));
ClutterActor *hscroll = st_scroll_view_get_hscroll_bar (ST_SCROLL_VIEW (self->actor));
gboolean h_scroll_visible, v_scroll_visible;
g_object_get (ST_SCROLL_VIEW (self->actor),
"hscrollbar-visible", &h_scroll_visible,
"vscrollbar-visible", &v_scroll_visible,
NULL);
if (self->program == COGL_INVALID_HANDLE)
goto out;
@ -204,7 +215,9 @@ st_scroll_view_fade_paint_target (ClutterOffscreenEffect *effect)
if (self->width_uniform > -1)
cogl_program_set_uniform_1f (self->program, self->width_uniform, clutter_actor_get_width (self->actor));
if (self->scrollbar_width_uniform > -1)
cogl_program_set_uniform_1f (self->program, self->scrollbar_width_uniform, clutter_actor_get_width (vscroll));
cogl_program_set_uniform_1f (self->program, self->scrollbar_width_uniform, v_scroll_visible ? clutter_actor_get_width (vscroll) : 0);
if (self->scrollbar_height_uniform > -1)
cogl_program_set_uniform_1f (self->program, self->scrollbar_height_uniform, h_scroll_visible ? clutter_actor_get_height (hscroll) : 0);
if (self->rtl_uniform > -1)
cogl_program_set_uniform_1i (self->program, self->rtl_uniform, (st_widget_get_direction (ST_WIDGET (self->actor)) == ST_TEXT_DIRECTION_RTL));
@ -416,6 +429,7 @@ st_scroll_view_fade_init (StScrollViewFade *self)
self->height_uniform = -1;
self->width_uniform = -1;
self->scrollbar_width_uniform = -1;
self->scrollbar_height_uniform = -1;
self->rtl_uniform = -1;
self->offset_top_uniform = -1;
self->offset_bottom_uniform = -1;