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texthandle: Update child visibility of handles within scrollables

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If the rect a handle points to starts falling outside of the parent
scrollable allocation, the handle will be automatically hidden, and
shown again when the rectangle is visible too.
This commit is contained in:
Carlos Garnacho 2014-01-22 16:41:00 +01:00
parent 328404795b
commit 9fe26a93eb
1 changed files with 39 additions and 3 deletions
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42
gtk/gtktexthandle.c
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@ -251,6 +251,40 @@ _gtk_text_handle_ensure_widget (GtkTextHandle *handle,
return priv->windows[pos].widget;
}
static void
_handle_update_child_visible (GtkTextHandle *handle,
GtkTextHandlePosition pos)
{
HandleWindow *handle_window;
GtkTextHandlePrivate *priv;
cairo_rectangle_int_t rect;
GtkAllocation allocation;
GtkWidget *parent;
priv = handle->priv;
handle_window = &priv->windows[pos];
if (!priv->parent_scrollable)
{
gtk_widget_set_child_visible (handle_window->widget, TRUE);
return;
}
parent = gtk_widget_get_parent (GTK_WIDGET (priv->parent_scrollable));
rect = handle_window->pointing_to;
gtk_widget_translate_coordinates (priv->parent, parent,
rect.x, rect.y, &rect.x, &rect.y);
gtk_widget_get_allocation (GTK_WIDGET (parent), &allocation);
if (rect.x < 0 || rect.x + rect.width > allocation.width ||
rect.y < 0 || rect.y + rect.height > allocation.height)
gtk_widget_set_child_visible (handle_window->widget, FALSE);
else
gtk_widget_set_child_visible (handle_window->widget, TRUE);
}
static void
_gtk_text_handle_update (GtkTextHandle *handle,
GtkTextHandlePosition pos)
@ -273,9 +307,13 @@ _gtk_text_handle_update (GtkTextHandle *handle,
GtkWidget *window;
_gtk_text_handle_ensure_widget (handle, pos);
_gtk_text_handle_get_size (handle, &width, &height);
rect.x = handle_window->pointing_to.x;
rect.y = handle_window->pointing_to.y;
_gtk_text_handle_get_size (handle, &width, &height);
rect.width = width;
rect.height = 0;
_handle_update_child_visible (handle, pos);
window = gtk_widget_get_parent (handle_window->widget);
gtk_widget_translate_coordinates (priv->parent, window,
@ -290,8 +328,6 @@ _gtk_text_handle_update (GtkTextHandle *handle,
}
height += handle_window->pointing_to.height;
rect.width = width;
rect.height = 0;
rect.x -= rect.width / 2;
gtk_widget_set_size_request (handle_window->widget, width, height);