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// Copyright 2013-2015, The Gtk-rs Project Developers.
// See the COPYRIGHT file at the top-level directory of this distribution.
// Licensed under the MIT license, see the LICENSE file or <http://opensource.org/licenses/MIT>

use gdk::RGBA;
use gdk_sys;
use glib::object::IsA;
use glib::translate::*;
use gtk_sys;
use libc::c_int;
use ColorChooser;
use Orientation;

pub trait ColorChooserExtManual: 'static {
    /// Adds a palette to the color chooser. If `orientation` is horizontal,
    /// the colors are grouped in rows, with `colors_per_line` colors
    /// in each row. If `horizontal` is `false`, the colors are grouped
    /// in columns instead.
    ///
    /// The default color palette of `ColorChooserWidget` has
    /// 27 colors, organized in columns of 3 colors. The default gray
    /// palette has 9 grays in a single row.
    ///
    /// The layout of the color chooser widget works best when the
    /// palettes have 9-10 columns.
    ///
    /// Calling this function for the first time has the
    /// side effect of removing the default color and gray palettes
    /// from the color chooser.
    ///
    /// If `colors` is `None`, removes all previously added palettes.
    /// ## `orientation`
    /// `Orientation::Horizontal` if the palette should
    ///  be displayed in rows, `Orientation::Vertical` for columns
    /// ## `colors_per_line`
    /// the number of colors to show in each row/column
    /// ## `n_colors`
    /// the total number of elements in `colors`
    /// ## `colors`
    /// the colors of the palette, or `None`
    fn add_palette(&self, orientation: Orientation, colors_per_line: i32, colors: &[RGBA]);
}

impl<O: IsA<ColorChooser>> ColorChooserExtManual for O {
    fn add_palette(&self, orientation: Orientation, colors_per_line: i32, colors: &[RGBA]) {
        unsafe {
            gtk_sys::gtk_color_chooser_add_palette(
                self.as_ref().to_glib_none().0,
                orientation.to_glib(),
                colors_per_line,
                colors.len() as c_int,
                colors.as_ptr() as *mut gdk_sys::GdkRGBA,
            )
        }
    }
}