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/* -*- Mode: Vala; indent-tabs-mode: nil; tab-width: 4 -*-
* -*- coding: utf-8 -*-
*
* Copyright (C) 2011 ~ 2018 Deepin, Inc.
* 2011 ~ 2018 Wang Yong
*
* Author: Wang Yong <wangyong@deepin.com>
* Maintainer: Wang Yong <wangyong@deepin.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, either version 3 of the License, or
* any later version.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
using Animation;
using Gtk;
using Widgets;
namespace Widgets {
public class Switcher : Gtk.HBox {
public AnimateTimer scroll_to_left_timer;
public AnimateTimer scroll_to_right_timer;
public Gtk.Box box;
public Gtk.Box left_box;
public Gtk.Box right_box;
public Gtk.ScrolledWindow scrolledwindow;
public int scroll_to_left_end_x;
public int scroll_to_left_interval = 500;
public int scroll_to_left_start_x;
public int scroll_to_right_end_x;
public int scroll_to_right_interval = 500;
public int scroll_to_right_start_x;
public int width;
public Switcher(int w) {
width = w;
scroll_to_left_timer = new AnimateTimer(AnimateTimer.ease_out_quint, scroll_to_left_interval);
scroll_to_left_timer.animate.connect(scroll_to_left_animate);
scroll_to_right_timer = new AnimateTimer(AnimateTimer.ease_out_quint, scroll_to_right_interval);
scroll_to_right_timer.animate.connect(scroll_to_right_animate);
// NOTE: don's set policy of scrolledwindow to NEVER.
// Otherwise scrolledwindow will increate width with child's size.
scrolledwindow = new ScrolledWindow(null, null);
scrolledwindow.set_shadow_type(Gtk.ShadowType.NONE);
scrolledwindow.get_style_context().add_class("scrolledwindow");
scrolledwindow.get_vscrollbar().get_style_context().add_class("switcher_scrollbar");
scrolledwindow.get_hscrollbar().get_style_context().add_class("switcher_scrollbar");
box = new Gtk.Box(Gtk.Orientation.HORIZONTAL, 0);
left_box = new Gtk.Box(Gtk.Orientation.VERTICAL, 0);
right_box = new Gtk.Box(Gtk.Orientation.VERTICAL, 0);
set_size_request(width, -1);
box.pack_start(left_box, false, false, 0);
box.pack_start(right_box, false, false, 0);
scrolledwindow.add(box);
pack_start(scrolledwindow, true, true, 0);
}
public void add_to_left_box(Gtk.Widget start_widget) {
Utils.remove_all_children(left_box);
Utils.remove_all_children(right_box);
left_box.pack_start(start_widget, true, true, 0);
}
public void scroll_to_left(Gtk.Widget start_widget, Gtk.Widget end_widget) {
Utils.remove_all_children(left_box);
Utils.remove_all_children(right_box);
left_box.pack_start(end_widget, true, true, 0);
right_box.pack_start(start_widget, true, true, 0);
var adjust = scrolledwindow.get_hadjustment();
adjust.set_value(width);
scroll_to_left_start_x = width;
scroll_to_left_end_x = 0;
scroll_to_left_timer.reset();
}
public void scroll_to_right(Gtk.Widget start_widget, Gtk.Widget end_widget) {
Utils.remove_all_children(left_box);
Utils.remove_all_children(right_box);
left_box.pack_start(start_widget, true, true, 0);
right_box.pack_start(end_widget, true, true, 0);
var adjust = scrolledwindow.get_hadjustment();
adjust.set_value(0);
scroll_to_right_start_x = 0;
scroll_to_right_end_x = width;
scroll_to_right_timer.reset();
}
public void scroll_to_left_animate(double progress) {
var adjust = scrolledwindow.get_hadjustment();
adjust.set_value(scroll_to_left_start_x + (int) (scroll_to_left_end_x - scroll_to_left_start_x) * progress);
if (progress >= 1.0) {
scroll_to_left_timer.stop();
}
}
public void scroll_to_right_animate(double progress) {
var adjust = scrolledwindow.get_hadjustment();
adjust.set_value(scroll_to_right_start_x + (int) (scroll_to_right_end_x - scroll_to_right_start_x) * progress);
if (progress >= 1.0) {
scroll_to_right_timer.stop();
}
}
}
}
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