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/*
* Copyright (C) 2009-2017 Canonical Ltd.
* Author: Robert Ancell <robert.ancell@canonical.com>,
* Eduard Gotwig <g@ox.io>
*
* 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, either version 3 of the License, or (at your option) any later
* version. See http://www.gnu.org/copyleft/gpl.html the full text of the
* license.
*/
public class PageIcon : Gtk.DrawingArea
{
private string text;
private double r;
private double g;
private double b;
private const int MINIMUM_WIDTH = 20;
public PageIcon (string text, double r = 1.0, double g = 1.0, double b = 1.0)
{
this.text = text;
this.r = r;
this.g = g;
this.b = b;
}
public override void get_preferred_width (out int minimum_width, out int natural_width)
{
minimum_width = natural_width = MINIMUM_WIDTH;
}
public override void get_preferred_height (out int minimum_height, out int natural_height)
{
minimum_height = natural_height = (int) Math.round (MINIMUM_WIDTH * Math.SQRT2);
}
public override void get_preferred_height_for_width (int width, out int minimum_height, out int natural_height)
{
minimum_height = natural_height = (int) (width * Math.SQRT2);
}
public override void get_preferred_width_for_height (int height, out int minimum_width, out int natural_width)
{
minimum_width = natural_width = (int) (height / Math.SQRT2);
}
public override bool draw (Cairo.Context c)
{
var w = get_allocated_width ();
var h = get_allocated_height ();
if (w * Math.SQRT2 > h)
w = (int) Math.round (h / Math.SQRT2);
else
h = (int) Math.round (w * Math.SQRT2);
c.translate ((get_allocated_width () - w) / 2, (get_allocated_height () - h) / 2);
c.rectangle (0.5, 0.5, w - 1, h - 1);
c.set_source_rgb (r, g, b);
c.fill_preserve ();
c.set_line_width (1.0);
c.set_source_rgb (0.0, 0.0, 0.0);
c.stroke ();
Cairo.TextExtents extents;
c.text_extents (text, out extents);
c.translate ((w - extents.width) * 0.5 - 0.5, (h + extents.height) * 0.5 - 0.5);
c.show_text (text);
return true;
}
}
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