forked from AuroraMiddleware/gtk
tooltip: add tooltip-radius and tooltip-alpha style properties
This allows themes to change the tooltip opacity and radius. Based on a downstream Fedora patch by Matthias Clasen. https://bugzilla.gnome.org/show_bug.cgi?id=683070
This commit is contained in:
Cosimo Cecchi
parent
3d5cd6e055
commit
af26ec6a73
190
gtk/gtktooltip.c
190
gtk/gtktooltip.c
@ -97,6 +97,7 @@ static void gtk_tooltip_display_closed (GdkDisplay *display,
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GtkTooltip *tooltip);
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static void gtk_tooltip_set_last_window (GtkTooltip *tooltip,
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GdkWindow *window);
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static void update_shape (GtkTooltip *tooltip);
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G_DEFINE_TYPE (GtkTooltip, gtk_tooltip, G_TYPE_OBJECT);
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@ -111,6 +112,39 @@ gtk_tooltip_class_init (GtkTooltipClass *klass)
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object_class->dispose = gtk_tooltip_dispose;
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}
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static void
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on_composited_changed (GtkWidget *window,
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GtkTooltip *tooltip)
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{
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update_shape (tooltip);
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}
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static void
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on_screen_changed (GtkWidget *window,
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GdkScreen *previous,
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GtkTooltip *tooltip)
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{
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GdkScreen *screen;
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GdkColormap *cmap;
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screen = gtk_widget_get_screen (window);
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cmap = NULL;
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if (gdk_screen_is_composited (screen))
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cmap = gdk_screen_get_rgba_colormap (screen);
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if (cmap == NULL)
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cmap = gdk_screen_get_rgb_colormap (screen);
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gtk_widget_set_colormap (window, cmap);
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}
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static void
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on_realized (GtkWidget *window,
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GtkTooltip *tooltip)
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{
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update_shape (tooltip);
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}
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static void
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gtk_tooltip_init (GtkTooltip *tooltip)
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{
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@ -129,8 +163,12 @@ gtk_tooltip_init (GtkTooltip *tooltip)
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tooltip->last_window = NULL;
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tooltip->window = g_object_ref (gtk_window_new (GTK_WINDOW_POPUP));
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on_screen_changed (tooltip->window, NULL, tooltip);
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gtk_window_set_type_hint (GTK_WINDOW (tooltip->window),
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GDK_WINDOW_TYPE_HINT_TOOLTIP);
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gtk_widget_set_app_paintable (tooltip->window, TRUE);
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gtk_window_set_resizable (GTK_WINDOW (tooltip->window), FALSE);
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gtk_widget_set_name (tooltip->window, "gtk-tooltip");
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@ -164,6 +202,13 @@ gtk_tooltip_init (GtkTooltip *tooltip)
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gtk_box_pack_start (GTK_BOX (tooltip->box), tooltip->label,
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FALSE, FALSE, 0);
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g_signal_connect (tooltip->window, "composited-changed",
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G_CALLBACK (on_composited_changed), tooltip);
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g_signal_connect (tooltip->window, "screen-changed",
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G_CALLBACK (on_screen_changed), tooltip);
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g_signal_connect (tooltip->window, "realize",
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G_CALLBACK (on_realized), tooltip);
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tooltip->custom_widget = NULL;
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}
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@ -510,8 +555,152 @@ gtk_tooltip_window_style_set (GtkTooltip *tooltip)
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gtk_widget_queue_draw (tooltip->window);
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}
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static void
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draw_round_rect (cairo_t *cr,
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gdouble aspect,
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gdouble x,
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gdouble y,
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gdouble corner_radius,
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gdouble width,
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gdouble height)
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{
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gdouble radius = corner_radius / aspect;
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cairo_move_to (cr, x + radius, y);
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/* top-right, left of the corner */
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cairo_line_to (cr, x + width - radius, y);
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/* top-right, below the corner */
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cairo_arc (cr,
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x + width - radius, y + radius, radius,
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-90.0f * G_PI / 180.0f, 0.0f * G_PI / 180.0f);
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/* bottom-right, above the corner */
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cairo_line_to (cr, x + width, y + height - radius);
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/* bottom-right, left of the corner */
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cairo_arc (cr,
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x + width - radius, y + height - radius, radius,
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0.0f * G_PI / 180.0f, 90.0f * G_PI / 180.0f);
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/* bottom-left, right of the corner */
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cairo_line_to (cr, x + radius, y + height);
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/* bottom-left, above the corner */
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cairo_arc (cr,
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x + radius, y + height - radius, radius,
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90.0f * G_PI / 180.0f, 180.0f * G_PI / 180.0f);
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/* top-left, below the corner */
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cairo_line_to (cr, x, y + radius);
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/* top-left, right of the corner */
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cairo_arc (cr,
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x + radius, y + radius, radius,
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180.0f * G_PI / 180.0f, 270.0f * G_PI / 180.0f);
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cairo_close_path (cr);
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}
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static void
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fill_background (GtkWidget *widget,
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cairo_t *cr,
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GdkColor *bg_color,
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GdkColor *border_color,
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guchar alpha)
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{
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gint tooltip_radius;
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if (!gtk_widget_is_composited (widget))
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alpha = 255;
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gtk_widget_style_get (widget,
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"tooltip-radius", &tooltip_radius,
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NULL);
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cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
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cairo_paint (cr);
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cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
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draw_round_rect (cr,
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1.0, 0.5, 0.5, tooltip_radius,
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widget->allocation.width - 1,
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widget->allocation.height - 1);
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cairo_set_source_rgba (cr,
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(float) bg_color->red / 65535.0,
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(float) bg_color->green / 65535.0,
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(float) bg_color->blue / 65535.0,
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(float) alpha / 255.0);
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cairo_fill_preserve (cr);
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cairo_set_source_rgba (cr,
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(float) border_color->red / 65535.0,
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(float) border_color->green / 65535.0,
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(float) border_color->blue / 65535.0,
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(float) alpha / 255.0);
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cairo_set_line_width (cr, 1.0);
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cairo_stroke (cr);
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}
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static void
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update_shape (GtkTooltip *tooltip)
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{
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GdkBitmap *mask;
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cairo_t *cr;
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gint width, height, tooltip_radius;
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gtk_widget_style_get (tooltip->window,
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"tooltip-radius", &tooltip_radius,
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NULL);
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if (tooltip_radius == 0 ||
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gtk_widget_is_composited (tooltip->window))
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{
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gtk_widget_shape_combine_mask (tooltip->window, NULL, 0, 0);
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return;
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}
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gtk_window_get_size (GTK_WINDOW (tooltip->window), &width, &height);
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mask = (GdkBitmap *) gdk_pixmap_new (NULL, width, height, 1);
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cr = gdk_cairo_create (mask);
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fill_background (tooltip->window, cr,
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&tooltip->window->style->black,
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&tooltip->window->style->black,
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255);
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gtk_widget_shape_combine_mask (tooltip->window, mask, 0, 0);
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cairo_destroy (cr);
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g_object_unref (mask);
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}
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static gboolean
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gtk_tooltip_paint_window (GtkTooltip *tooltip)
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{
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guchar tooltip_alpha;
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gint tooltip_radius;
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gtk_widget_style_get (tooltip->window,
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"tooltip-alpha", &tooltip_alpha,
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"tooltip-radius", &tooltip_radius,
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NULL);
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if (tooltip_alpha != 255 || tooltip_radius != 0)
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{
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cairo_t *cr;
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cr = gdk_cairo_create (tooltip->window->window);
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fill_background (tooltip->window, cr,
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&tooltip->window->style->bg [GTK_STATE_NORMAL],
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&tooltip->window->style->bg [GTK_STATE_SELECTED],
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tooltip_alpha);
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cairo_destroy (cr);
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update_shape (tooltip);
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}
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else
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{
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gtk_paint_flat_box (tooltip->window->style,
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tooltip->window->window,
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@ -523,6 +712,7 @@ gtk_tooltip_paint_window (GtkTooltip *tooltip)
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0, 0,
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tooltip->window->allocation.width,
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tooltip->window->allocation.height);
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}
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return FALSE;
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}
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@ -2586,6 +2586,32 @@ gtk_widget_class_init (GtkWidgetClass *klass)
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P_("The length of vertical scroll arrows"),
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1, G_MAXINT, 16,
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GTK_PARAM_READABLE));
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/**
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* GtkWidget:tooltip-alpha:
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*
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* The "tooltip-alpha" style property defines the opacity of
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* widget tooltips.
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*/
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gtk_widget_class_install_style_property (klass,
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g_param_spec_uchar ("tooltip-alpha",
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P_("Tooltips opacity"),
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P_("The opacity to be used when drawing tooltips"),
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0, 255, 255,
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GTK_PARAM_READABLE));
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/**
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* GtkWidget:tooltip-radius:
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*
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* The "tooltip-radius" style property defines the radius of
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* widget tooltips.
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*/
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gtk_widget_class_install_style_property (klass,
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g_param_spec_uint ("tooltip-radius",
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P_("Tooltips radius"),
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P_("The radius to be used when drawing tooltips"),
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0, G_MAXINT, 0,
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GTK_PARAM_READABLE));
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}
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static void
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