Add Border widget

Draws an outline around another widget

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 124 insertions, 0 deletions

diff --git a/nichrome/nichrome-border.5c b/nichrome/nichrome-border.5c
new file mode 100644
index 0000000..5888b11
--- /dev/null
+++ b/nichrome/nichrome-border.5c
@@ -0,0 +1,124 @@
+/*
+ * Copyright © 2012 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+autoload Nichrome;
+
+extend namespace Nichrome {
+	public namespace Border {
+
+		import Cairo;
+
+		protected typedef widget_t + struct {
+			real		left, right, top, bottom;
+			rgba_color_t    color;
+			*widget_t	child;
+		} border_t;
+
+		protected void natural (cairo_t cr, *border_t widget) {
+			save(cr);
+			translate(cr, widget->left, widget->top);
+			widget->child->natural(cr, widget->child);
+			restore(cr);
+			rect_t r = Cairo::fill_extents(cr);
+			new_path(cr);
+			rectangle (cr, r.x - widget->left, r.y -widget-> top,
+				   r.width + widget->left + widget->right,
+				   r.height + widget->top + widget->bottom);
+		}
+
+		protected void outline (cairo_t cr, *border_t widget) {
+			rectangle (cr, 0, 0, 0, 0);
+		}
+
+		protected void draw (cairo_t cr, *border_t widget) {
+			save(cr);
+			set_fill_rule(cr, fill_rule_t.EVEN_ODD);
+			set_source_rgba (cr, widget->color.red, widget->color.green,
+					 widget->color.blue, widget->color.alpha);
+			rectangle (cr, 0, 0, widget->geometry.width, widget->geometry.height);
+			rectangle (cr,
+				   widget->left,
+				   widget->top,
+				   widget->geometry.width - widget->right - widget->left,
+				   widget->geometry.height - widget->bottom - widget->top);
+			fill (cr);
+			restore(cr);
+		}
+
+		protected void configure (*border_t widget, rect_t geometry) {
+			widget->geometry = geometry;
+			widget->child->configure (widget->child, (rect_t) {
+					.x = geometry.x + widget->left,
+					.y = geometry.y + widget->top,
+					.width = geometry.width - widget->left - widget->right,
+					.height = geometry.height - widget->top - widget->bottom
+						});
+		}
+
+		protected void remove (*border_t widget) {
+			widget->child->remove (widget->child);
+			Widget::remove(widget);
+		}
+
+		protected void print (*border_t widget, int indent) {
+			do_indent(indent);
+			printf ("border %d %d %d %d\n", widget->left, widget->right, widget->top, widget->bottom);
+			widget->child->print (widget->child, indent + 8);
+		}
+
+		protected void init (*border_t widget, *widget_t child, real args ...) {
+			Widget::init(&child->nichrome, widget);
+			widget->child = child;
+
+			switch (dim(args)) {
+			case 0:
+				widget->left = widget->top = widget->right = widget->bottom = 1;
+				break;
+			case 1:
+				widget->left = widget->top = widget->right = widget->bottom = args[0];
+				break;
+			case 2:
+			case 3:
+				widget->left = widget->right = args[0];
+				widget->top = widget->bottom = args[1];
+				break;
+			case 4:
+				widget->left = args[0];
+				widget->right = args[1];
+				widget->top = args[2];
+				widget->bottom = args[3];
+				break;
+			}
+			widget->draw = draw;
+			widget->outline = outline;
+			widget->natural = natural;
+			widget->configure = configure;
+			widget->remove = remove;
+			widget->print = print;
+			widget->color = (rgba_color_t) {
+				red = 0, green = 0, blue = 0, alpha = 1
+			};
+		}
+
+		protected *widget_t new (*widget_t child, real args...) {
+			*border_t	widget = &(border_t) {};
+
+			init(widget, child, args...);
+			return widget;
+		}
+	}
+}