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New function to scroll to a path. (#306838, Jonathan Blandford)

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2005-06-09  Matthias Clasen  <mclasen@redhat.com>

	* gtk/gtk.symbols:
	* gtk/gtkiconview.h:
	* gtk/gtkiconview.c (gtk_icon_view_scroll_to_path): New function
	to scroll to a path.  (#306838, Jonathan Blandford)
This commit is contained in:
Matthias Clasen
2005-06-09 06:07:57 +00:00
committed by Matthias Clasen
parent b839a7b0c6
commit 54935477ea
6 changed files with 105 additions and 0 deletions
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7
ChangeLog
View File

@@ -1,3 +1,10 @@
2005-06-09 Matthias Clasen <mclasen@redhat.com>
* gtk/gtk.symbols:
* gtk/gtkiconview.h:
* gtk/gtkiconview.c (gtk_icon_view_scroll_to_path): New function
to scroll to a path. (#306838, Jonathan Blandford)
2005-06-08 Matthias Clasen <mclasen@redhat.com>
* gtk/gtkiconview.c (gtk_icon_view_set_cursor): Scroll to the

7
ChangeLog.pre-2-10
View File

@@ -1,3 +1,10 @@
2005-06-09 Matthias Clasen <mclasen@redhat.com>
* gtk/gtk.symbols:
* gtk/gtkiconview.h:
* gtk/gtkiconview.c (gtk_icon_view_scroll_to_path): New function
to scroll to a path. (#306838, Jonathan Blandford)
2005-06-08 Matthias Clasen <mclasen@redhat.com>
* gtk/gtkiconview.c (gtk_icon_view_set_cursor): Scroll to the

7
ChangeLog.pre-2-8
View File

@@ -1,3 +1,10 @@
2005-06-09 Matthias Clasen <mclasen@redhat.com>
* gtk/gtk.symbols:
* gtk/gtkiconview.h:
* gtk/gtkiconview.c (gtk_icon_view_scroll_to_path): New function
to scroll to a path. (#306838, Jonathan Blandford)
2005-06-08 Matthias Clasen <mclasen@redhat.com>
* gtk/gtkiconview.c (gtk_icon_view_set_cursor): Scroll to the

1
gtk/gtk.symbols
View File

@@ -1678,6 +1678,7 @@ gtk_icon_view_item_activated
gtk_icon_view_new
gtk_icon_view_new_with_model
gtk_icon_view_path_is_selected
gtk_icon_view_scroll_to_path
gtk_icon_view_select_all
gtk_icon_view_selected_foreach
gtk_icon_view_select_path

78
gtk/gtkiconview.c
View File

@@ -3881,6 +3881,84 @@ gtk_icon_view_move_cursor_start_end (GtkIconView *icon_view,
g_signal_emit (icon_view, icon_view_signals[SELECTION_CHANGED], 0);
}
/**
* gtk_icon_view_scroll_to_path:
* @icon_view: A #GtkIconView.
* @path: The path of the item to move to.
* @use_align: whether to use alignment arguments, or %FALSE.
* @row_align: The vertical alignment of the item specified by @path.
* @col_align: The horizontal alignment of the item specified by @column.
*
* Moves the alignments of @icon_view to the position specified by @path.
* @row_align determines where the row is placed, and @col_align determines where
* @column is placed. Both are expected to be between 0.0 and 1.0.
* 0.0 means left/top alignment, 1.0 means right/bottom alignment, 0.5 means center.
*
* If @use_align is %FALSE, then the alignment arguments are ignored, and the
* tree does the minimum amount of work to scroll the item onto the screen.
* This means that the item will be scrolled to the edge closest to its current
* position. If the item is currently visible on the screen, nothing is done.
*
* This function only works if the model is set, and @path is a valid row on the
* model. If the model changes before the @tree_view is realized, the centered
* path will be modified to reflect this change.
*
* Since: 2.8
**/
void
gtk_icon_view_scroll_to_path (GtkIconView *icon_view,
GtkTreePath *path,
gboolean use_align,
gfloat row_align,
gfloat col_align)
{
GtkIconViewItem *item;
g_return_if_fail (GTK_IS_ICON_VIEW (icon_view));
g_return_if_fail (path != NULL);
g_return_if_fail (row_align >= 0.0 && row_align <= 1.0);
g_return_if_fail (col_align >= 0.0 && col_align <= 1.0);
item = g_list_nth (icon_view->priv->items,
gtk_tree_path_get_indices(path)[0])->data;
if (!item)
return;
if (use_align)
{
gint x, y, width, height;
gint focus_width;
gfloat offset, value;
gtk_widget_style_get (GTK_WIDGET (icon_view),
"focus-line-width", &focus_width,
NULL);
gdk_window_get_position (icon_view->priv->bin_window, &x, &y);
offset = y + item->y - focus_width -
row_align * (GTK_WIDGET (icon_view)->allocation.height - item->height);
value = CLAMP (icon_view->priv->vadjustment->value + offset,
icon_view->priv->vadjustment->lower,
icon_view->priv->vadjustment->upper - icon_view->priv->vadjustment->page_size);
gtk_adjustment_set_value (icon_view->priv->vadjustment, value);
offset = x + item->x - focus_width -
col_align * (GTK_WIDGET (icon_view)->allocation.width - item->width);
value = CLAMP (icon_view->priv->hadjustment->value + offset,
icon_view->priv->hadjustment->lower,
icon_view->priv->hadjustment->upper - icon_view->priv->hadjustment->page_size);
gtk_adjustment_set_value (icon_view->priv->hadjustment, value);
gtk_adjustment_changed (icon_view->priv->hadjustment);
gtk_adjustment_changed (icon_view->priv->vadjustment);
}
else
gtk_icon_view_scroll_to_item (icon_view, item);
}
static void
gtk_icon_view_scroll_to_item (GtkIconView *icon_view,
GtkIconViewItem *item)

5
gtk/gtkiconview.h
View File

@@ -154,6 +154,11 @@ void gtk_icon_view_set_cursor (GtkIconView *icon_
gboolean gtk_icon_view_get_cursor (GtkIconView *icon_view,
GtkTreePath **path,
GtkCellRenderer **cell);
void gtk_icon_view_scroll_to_path (GtkIconView *icon_view,
GtkTreePath *path,
gboolean use_align,
gfloat row_align,
gfloat col_align);
/* Drag-and-Drop support */
void gtk_icon_view_enable_model_drag_source (GtkIconView *icon_view,