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| author | Christopher James Lahey <clahey@helixcode.com> | 2000-05-31 03:32:36 +0800 |
|---|---|---|
| committer | Chris Lahey <clahey@src.gnome.org> | 2000-05-31 03:32:36 +0800 |
| commit | e169895ef5190451091849db40e988a769786beb (patch) | |
| tree | 073348f5353959091fa7be79a0f85eef8aa49978 /e-util/e-canvas-utils.c | |
| parent | eaddfcefea7b157870cb1a20b608cabfcb03c940 (diff) | |
| download | gsoc2013-evolution-e169895ef5190451091849db40e988a769786beb.tar.gz gsoc2013-evolution-e169895ef5190451091849db40e988a769786beb.tar.zst gsoc2013-evolution-e169895ef5190451091849db40e988a769786beb.zip | |
Added e_canvas_item_show_area which makes sure that a particular area of a
2000-05-30 Christopher James Lahey <clahey@helixcode.com>
* e-canvas-utils.c, e-canvas-utils.h: Added
e_canvas_item_show_area which makes sure that a particular area of
a given item is in the scroll area.
svn path=/trunk/; revision=3289
Diffstat (limited to 'e-util/e-canvas-utils.c')
| -rw-r--r-- | e-util/e-canvas-utils.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/e-util/e-canvas-utils.c b/e-util/e-canvas-utils.c index 2b50248124..ac61545b5f 100644 --- a/e-util/e-canvas-utils.c +++ b/e-util/e-canvas-utils.c @@ -34,3 +34,34 @@ e_canvas_item_move_absolute (GnomeCanvasItem *item, double dx, double dy) gnome_canvas_item_affine_absolute (item, translate); } + +void +e_canvas_item_show_area (GnomeCanvasItem *item, double x1, double y1, double x2, double y2) +{ + GtkAdjustment *h, *v; + double dx = 0, dy = 0; + + g_return_if_fail (item != NULL); + g_return_if_fail (GNOME_IS_CANVAS_ITEM (item)); + + gnome_canvas_item_i2w(item, &x1, &y1); + gnome_canvas_item_i2w(item, &x2, &y2); + + h = gtk_layout_get_hadjustment(GTK_LAYOUT(item->canvas)); + v = gtk_layout_get_vadjustment(GTK_LAYOUT(item->canvas)); + + if (x2 > h->value + h->page_size) + dx = (x2 - (h->value + h->page_size)); + if (y2 > v->value + v->page_size) + dy = (y2 - (v->value + v->page_size)); + + if (x1 < h->value + dx) + dx = (x1 - h->value); + if (y1 < v->value + dy) + dy = (y1 - v->value); + + if (dx) + gtk_adjustment_set_value(h, h->value + dx); + if (dy) + gtk_adjustment_set_value(v, v->value + dy); +} |