Name the toolkit 'nichrome' (thanks again, Bart).

This patch also includes some random geometry adjustments, and the use of
'lozenges' for buttons, toggles and scrollbars.

1 files changed, 123 insertions, 0 deletions

diff --git a/nichrome/nichrome-label.5c b/nichrome/nichrome-label.5c
new file mode 100644
index 0000000..5239d17
--- /dev/null
+++ b/nichrome/nichrome-label.5c
@@ -0,0 +1,123 @@
+/*
+ * Copyright © 2008 Keith Packard
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it either under the terms of the GNU Lesser General Public
+ * License version 2.1 as published by the Free Software Foundation
+ * (the "LGPL") or, at your option, under the terms of the Mozilla
+ * Public License Version 1.1 (the "MPL"). If you do not alter this
+ * notice, a recipient may use your version of this file under either
+ * the MPL or the LGPL.
+ *
+ * You should have received a copy of the LGPL along with this library
+ * in the file COPYING-LGPL-2.1; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * You should have received a copy of the MPL along with this library
+ * in the file COPYING-MPL-1.1
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
+ * OF ANY KIND, either express or implied. See the LGPL or the MPL for
+ * the specific language governing rights and limitations.
+ *
+ * The Original Code is the cairo graphics library.
+ *
+ * The Initial Developer of the Original Code is Keith Packard
+ *
+ * Contributor(s):
+ *      Keith Packard <keithp@keithp.com>
+ */
+
+autoload Nichrome;
+
+extend namespace Nichrome {
+    public namespace Label {
+
+	public typedef void (&widget_t widget) callback_t;
+	
+	public typedef widget_t + struct {
+	    string  label;
+	    string  font;
+	    rgba_color_t    color;
+	} label_t;
+	
+	typedef struct {
+	    real x, y;
+	    real pad;
+	    real width, height;
+	    real preferred_width, preferred_height;
+	} metrics_t;
+	
+	metrics_t get_metrics (cr, &label_t widget) {
+	    set_font (cr, widget.font);
+	    text_extents_t text = text_extents (cr, widget.label);
+	    text_extents_t m = text_extents (cr, "M");
+	    text_extents_t x = text_extents (cr, "x");
+	    font_extents_t font = font_extents(cr);
+	    metrics_t metrics;
+	    
+	    real pad = m.height / 2;
+	    metrics.pad = pad;
+	    metrics.preferred_width = pad + text.width + pad;
+	    metrics.preferred_height = pad + m.height + pad;
+	    metrics.width = max (widget.geometry.width, metrics.preferred_width);
+	    metrics.height = max (widget.geometry.height, metrics.preferred_height);
+	    real text_height = (x.height + m.height) / 2;
+	    real text_bearing = (x.y_bearing + m.y_bearing) / 2;
+	    metrics.y = floor ((metrics.height - text_height) / 2 
+			       - text_bearing + 0.5);
+	    metrics.x = floor ((metrics.width - text.width) / 2 
+			       - text.x_bearing + 0.5);
+	    return metrics;
+	}
+	
+	public void natural (cairo_t cr, &label_t widget) {
+	    metrics_t	metrics = get_metrics (cr, &widget);
+
+	    rectangle (cr, 0, 0, metrics.preferred_width, metrics.preferred_height);
+	}
+	
+	public void outline (cairo_t cr, &label_t widget) {
+	    metrics_t	metrics = get_metrics (cr, &widget);
+
+	    rectangle (cr, 0, 0, 0, 0);
+	}
+	
+	public void draw (cairo_t cr, &label_t widget) {
+	    metrics_t	metrics = get_metrics (cr, &widget);
+	    move_to (cr, metrics.x, metrics.y);
+	    set_source_rgba (cr, widget.color.red, widget.color.green,
+			     widget.color.blue, widget.color.alpha);
+	    show_text (cr, widget.label);
+	}
+	
+	public void relabel (&label_t widget, string label) {
+	    widget.label = label;
+	    Widget::resize (&widget);
+	}
+
+	public void init (&label_t widget, &nichrome_t nichrome, string label) {
+	    Widget::init (&nichrome, &widget);
+	    widget.label = label;
+	    widget.font = Widget::default_font;
+	    widget.draw = draw;
+	    widget.outline = outline;
+	    widget.natural = natural;
+	    widget.color = (rgba_color_t) {
+		red = 0, green = 0, blue = 0, alpha = 1
+	    };
+	}
+	
+	public *widget_t new (&nichrome_t nichrome,
+			      string label) {
+	    label_t	widget;
+
+	    init (&widget, &nichrome, label);
+	    return &widget;
+	}
+    }
+}