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widget: Don't assume opacity is 100%

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... just because there is no style context instantiated yet. Instead,
instantiate a style context during realize() and ask it.

Fixes problems with dim labels not being dimmed on first show.

Testcase included.

https://bugzilla.gnome.org/show_bug.cgi?id=735240
This commit is contained in:
Benjamin Otte 2014-09-06 06:41:05 +02:00
parent 95959ef470
commit 9a8a4a8b14
5 changed files with 55 additions and 12 deletions
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21
gtk/gtkwidget.c
View File

@ -5527,9 +5527,7 @@ gtk_widget_realize (GtkWidget *widget)
_gtk_widget_enable_device_events (widget);
gtk_widget_update_devices_mask (widget, TRUE);
if (gtk_widget_is_toplevel (widget))
gdk_window_set_opacity (priv->window,
priv->alpha / 255.0);
gtk_widget_update_alpha (widget);
if (priv->context)
gtk_style_context_set_scale (priv->context, gtk_widget_get_scale_factor (widget));
@ -15913,6 +15911,7 @@ static void
gtk_widget_update_alpha (GtkWidget *widget)
{
GtkWidgetPrivate *priv;
GtkStyleContext *context;
gdouble opacity;
guint8 alpha;
@ -15920,15 +15919,13 @@ gtk_widget_update_alpha (GtkWidget *widget)
alpha = priv->user_alpha;
if (priv->context)
{
opacity =
_gtk_css_number_value_get (_gtk_style_context_peek_property (priv->context,
GTK_CSS_PROPERTY_OPACITY),
100);
opacity = CLAMP (opacity, 0.0, 1.0);
alpha = round (priv->user_alpha * opacity);
}
context = gtk_widget_get_style_context (widget);
opacity =
_gtk_css_number_value_get (_gtk_style_context_peek_property (context,
GTK_CSS_PROPERTY_OPACITY),
100);
opacity = CLAMP (opacity, 0.0, 1.0);
alpha = round (priv->user_alpha * opacity);
if (alpha == priv->alpha)
return;

3
testsuite/reftests/Makefile.am
View File

@ -314,6 +314,9 @@ testdata = \
opacity.css \
opacity.ui \
opacity.ref.ui \
opacity-initial.css \
opacity-initial.ref.ui \
opacity-initial.ui \
overlay-no-main-widget.ref.ui \
overlay-no-main-widget.ui \
paned-undersized.css \

3
testsuite/reftests/opacity-initial.css Normal file
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@ -0,0 +1,3 @@
GtkLabel {
opacity: 0;
}

11
testsuite/reftests/opacity-initial.ref.ui Normal file
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@ -0,0 +1,11 @@
<?xml version="1.0" encoding="UTF-8"?>
<!-- Generated with glade 3.18.1 -->
<interface>
<requires lib="gtk+" version="3.12"/>
<object class="GtkWindow" id="window1">
<property name="width_request">200</property>
<property name="height_request">100</property>
<property name="can_focus">False</property>
<property name="type">popup</property>
</object>
</interface>

29
testsuite/reftests/opacity-initial.ui Normal file
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@ -0,0 +1,29 @@
<?xml version="1.0" encoding="UTF-8"?>
<!-- Generated with glade 3.18.1 -->
<interface>
<requires lib="gtk+" version="3.12"/>
<object class="GtkWindow" id="window1">
<property name="width_request">200</property>
<property name="height_request">100</property>
<property name="can_focus">False</property>
<property name="type">popup</property>
<child>
<object class="GtkOverlay" id="overlay1">
<property name="visible">True</property>
<property name="can_focus">False</property>
<child>
<placeholder/>
</child>
<child type="overlay">
<object class="GtkLabel" id="label1">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="label" translatable="yes">I'm the invisible label.
Incredible how you can
see right through me.</property>
</object>
</child>
</object>
</child>
</object>
</interface>