#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2015 Joseph Helm and Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab 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.
 *
 * HeuristicLab 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 HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using System;
using SharpDX.Direct2D1;
using Factory2D1 = SharpDX.Direct2D1.Factory;
using FactoryType2D1 = SharpDX.Direct2D1.FactoryType;
using System.Windows.Forms;
using SharpDX.DXGI;
using SharpDX;
using Colors = SharpDX.Color;
using SharpDX.DirectWrite;


namespace PackingPlanVisualizations {
  public partial class PackingPlan2D : UserControl {
    private WindowRenderTarget wndRender;
    private readonly Factory2D1 factory = new Factory2D1(FactoryType2D1.SingleThreaded);
    private readonly SharpDX.DirectWrite.Factory dwFactory = new SharpDX.DirectWrite.Factory(SharpDX.DirectWrite.FactoryType.Shared);
    private readonly RenderTargetProperties rndTargProperties = new RenderTargetProperties(new PixelFormat(Format.B8G8R8A8_UNorm, AlphaMode.Premultiplied));
    private HwndRenderTargetProperties hwndProperties;


    private SolidColorBrush containerBrush;
    private SolidColorBrush containerFillingBrush;
    private SolidColorBrush itemBrush;
    private SolidColorBrush itemFillingBrush;
    private SolidColorBrush labelBrush;
    private TextFormat textFormat;

    private CenteredContainer2D container;

    public PackingPlan2D() {
      InitializeComponent();
      this.SetStyle(ControlStyles.ResizeRedraw, true);
    }

    private void InitializeRenderTarget() {
      hwndProperties.Hwnd = this.Handle;
      hwndProperties.PixelSize = new Size2(this.Width, this.Height);
      hwndProperties.PresentOptions = PresentOptions.None;
      textFormat = new TextFormat(dwFactory, "arial", 14);

      wndRender = new WindowRenderTarget(factory, rndTargProperties, hwndProperties);
      wndRender.AntialiasMode = AntialiasMode.Aliased;
      containerBrush = new SolidColorBrush(wndRender, Colors.Black);
      containerFillingBrush = new SolidColorBrush(wndRender, Colors.DarkGray);
      itemBrush = new SolidColorBrush(wndRender, Colors.Black);
      itemFillingBrush = new SolidColorBrush(wndRender, new Color4(Color3.White, 0.5f));
      labelBrush = new SolidColorBrush(wndRender, Colors.Black);
    }

    public void InitializeContainer(float width, float height) {
      container = new CenteredContainer2D(new Vector2(Math.Max(this.Width - 12, 1), Math.Max(this.Height - 12, 1)), new Vector2(width, height));
    }

    public void AddItemToContainer(float width, float height, float x, float y, string label) {
      container.AddItem(new Vector2(width, height), new Vector2(x, y), label);
    }

    private void PackingPlan2D_Load(object sender, EventArgs e) {
      InitializeRenderTarget();
    }

    private void PackingPlan2D_Paint(object sender, PaintEventArgs e) {
      wndRender.BeginDraw();
      var controlColor = Colors.White;
      wndRender.Clear(new Colors(controlColor.R, controlColor.G, controlColor.B));

      if (container != null) {
        container.UpdateContainer(new Vector2(this.Width, this.Height));
        wndRender.FillRectangle(container.GetContainerData(), containerFillingBrush);

        foreach (var item in container.GetItemRectangles()) {
          wndRender.DrawRectangle(item.rectangle, itemBrush, 2f);
          wndRender.FillRectangle(item.rectangle, itemFillingBrush);
          wndRender.DrawText(item.label, textFormat, item.rectangle, labelBrush);
        }

        wndRender.DrawRectangle(container.GetContainerData(), containerBrush, 2.0f);
      }

      wndRender.Flush();
      wndRender.EndDraw();
    }

    private void PackingPlan2D_Resize(object sender, EventArgs e) {
      if (wndRender != null)
        wndRender.Resize(new Size2(this.Width, this.Height));
    }
  }
}