1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2010 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using System;
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23 | using System.Windows.Forms;
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24 | using HeuristicLab.Common;
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25 | using HeuristicLab.MainForm;
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26 |
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27 | namespace HeuristicLab.Core.Views {
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28 | /// <summary>
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29 | /// The visual representation of a <see cref="Variable"/>.
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30 | /// </summary>
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31 | [View("Variable Value View")]
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32 | [Content(typeof(Variable), false)]
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33 | [Content(typeof(IVariable), false)]
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34 | public partial class VariableValueView : ItemView {
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35 | /// <summary>
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36 | /// Gets or sets the variable to represent visually.
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37 | /// </summary>
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38 | /// <remarks>Uses property <see cref="ViewBase.Item"/> of base class <see cref="ViewBase"/>.
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39 | /// No own data storage present.</remarks>
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40 | public new IVariable Content {
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41 | get { return (IVariable)base.Content; }
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42 | set { base.Content = value; }
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43 | }
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44 |
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45 | /// <summary>
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46 | /// Initializes a new instance of <see cref="VariableView"/> with caption "Variable".
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47 | /// </summary>
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48 | public VariableValueView() {
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49 | InitializeComponent();
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50 | Caption = "Variable";
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51 | }
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52 | /// <summary>
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53 | /// Initializes a new instance of <see cref="VariableView"/> with the given <paramref name="variable"/>.
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54 | /// </summary>
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55 | /// <remarks>Calls <see cref="VariableView()"/>.</remarks>
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56 | /// <param name="variable">The variable to represent visually.</param>
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57 | public VariableValueView(IVariable content)
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58 | : this() {
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59 | Content = content;
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60 | }
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61 |
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62 | /// <summary>
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63 | /// Removes the eventhandlers from the underlying <see cref="Variable"/>.
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64 | /// </summary>
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65 | /// <remarks>Calls <see cref="ViewBase.RemoveItemEvents"/> of base class <see cref="ViewBase"/>.</remarks>
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66 | protected override void DeregisterContentEvents() {
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67 | Content.ValueChanged -= new EventHandler(Content_ValueChanged);
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68 | base.DeregisterContentEvents();
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69 | }
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70 |
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71 | /// <summary>
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72 | /// Adds eventhandlers to the underlying <see cref="Variable"/>.
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73 | /// </summary>
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74 | /// <remarks>Calls <see cref="ViewBase.AddItemEvents"/> of base class <see cref="ViewBase"/>.</remarks>
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75 | protected override void RegisterContentEvents() {
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76 | base.RegisterContentEvents();
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77 | Content.ValueChanged += new EventHandler(Content_ValueChanged);
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78 | }
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79 |
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80 | protected override void OnContentChanged() {
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81 | base.OnContentChanged();
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82 | if (Content == null) {
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83 | Caption = "Variable";
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84 | viewHost.Content = null;
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85 | } else {
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86 | Caption = Content.Name + " (" + Content.GetType().Name + ")";
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87 | viewHost.ViewType = null;
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88 | viewHost.Content = Content.Value;
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89 | }
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90 | SetEnabledStateOfControls();
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91 | }
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92 |
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93 | protected override void OnReadOnlyChanged() {
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94 | base.OnReadOnlyChanged();
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95 | SetEnabledStateOfControls();
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96 | }
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97 |
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98 | private void SetEnabledStateOfControls() {
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99 | valuePanel.Enabled = Content != null;
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100 | viewHost.ReadOnly = ReadOnly;
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101 | }
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102 |
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103 | protected virtual void Content_ValueChanged(object sender, EventArgs e) {
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104 | if (InvokeRequired)
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105 | Invoke(new EventHandler(Content_ValueChanged), sender, e);
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106 | else {
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107 | viewHost.ViewType = null;
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108 | viewHost.Content = Content.Value;
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109 | }
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110 | }
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111 |
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112 | protected virtual void valuePanel_DragEnterOver(object sender, DragEventArgs e) {
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113 | e.Effect = DragDropEffects.None;
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114 | Type type = e.Data.GetData("Type") as Type;
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115 | if (!ReadOnly && (type != null) && (typeof(IItem).IsAssignableFrom(type))) {
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116 | if ((e.KeyState & 8) == 8) e.Effect = DragDropEffects.Copy; // CTRL key
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117 | else if ((e.KeyState & 4) == 4) e.Effect = DragDropEffects.Move; // SHIFT key
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118 | else if ((e.AllowedEffect & DragDropEffects.Link) == DragDropEffects.Link) e.Effect = DragDropEffects.Link;
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119 | else if ((e.AllowedEffect & DragDropEffects.Copy) == DragDropEffects.Copy) e.Effect = DragDropEffects.Copy;
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120 | else if ((e.AllowedEffect & DragDropEffects.Move) == DragDropEffects.Move) e.Effect = DragDropEffects.Move;
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121 | }
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122 | }
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123 | protected virtual void valuePanel_DragDrop(object sender, DragEventArgs e) {
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124 | if (e.Effect != DragDropEffects.None) {
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125 | IItem item = e.Data.GetData("Value") as IItem;
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126 | if ((e.Effect & DragDropEffects.Copy) == DragDropEffects.Copy) item = (IItem)item.Clone();
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127 | Content.Value = item;
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128 | }
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129 | }
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130 | }
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131 | }
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