1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2013 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.ComponentModel;
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24 | using System.Linq;
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25 | using System.Threading.Tasks;
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26 | using System.Windows.Forms;
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27 | using HeuristicLab.MainForm;
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28 | using HeuristicLab.MainForm.WindowsForms;
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29 | using HeuristicLab.PluginInfrastructure;
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30 |
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31 | namespace HeuristicLab.Problems.Instances.Views {
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32 | [View("ProblemInstanceProviderViewGeneric")]
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33 | [Content(typeof(IProblemInstanceProvider<>), IsDefaultView = true)]
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34 | public partial class ProblemInstanceProviderViewGeneric<T> : ProblemInstanceProviderView {
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35 |
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36 | public new IProblemInstanceProvider<T> Content {
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37 | get { return (IProblemInstanceProvider<T>)base.Content; }
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38 | set { base.Content = value; }
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39 | }
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40 |
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41 | private IProblemInstanceConsumer<T> GenericConsumer { get { return Consumer as IProblemInstanceConsumer<T>; } }
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42 |
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43 | private IProblemInstanceConsumer consumer;
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44 | public override IProblemInstanceConsumer Consumer {
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45 | get { return consumer; }
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46 | set {
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47 | consumer = value;
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48 | SetEnabledStateOfControls();
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49 | }
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50 | }
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51 |
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52 | public ProblemInstanceProviderViewGeneric() {
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53 | InitializeComponent();
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54 | }
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55 |
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56 | protected override void OnContentChanged() {
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57 | base.OnContentChanged();
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58 | if (Content == null) {
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59 | instancesComboBox.DataSource = null;
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60 | } else {
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61 | instancesComboBox.DisplayMember = "Name";
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62 | var dataDescriptors = Content.GetDataDescriptors().ToList();
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63 | ShowInstanceLoad(dataDescriptors.Any());
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64 | instancesComboBox.DataSource = dataDescriptors;
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65 | instancesComboBox.SelectedIndex = -1;
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66 | }
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67 | }
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68 |
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69 | protected void ShowInstanceLoad(bool show) {
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70 | if (show) {
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71 | instanceLabel.Show();
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72 | instancesComboBox.Show();
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73 | } else {
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74 | instanceLabel.Hide();
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75 | instancesComboBox.Hide();
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76 | }
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77 | }
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78 |
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79 | protected override void SetEnabledStateOfControls() {
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80 | base.SetEnabledStateOfControls();
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81 | instancesComboBox.Enabled = !ReadOnly && !Locked && Content != null && GenericConsumer != null;
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82 | }
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83 |
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84 | private void instancesComboBox_DataSourceChanged(object sender, EventArgs e) {
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85 | var comboBox = (ComboBox)sender;
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86 | if (comboBox.DataSource == null)
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87 | comboBox.Items.Clear();
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88 | toolTip.SetToolTip(comboBox, String.Empty);
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89 | }
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90 |
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91 | private void instancesComboBox_SelectionChangeCommitted(object sender, System.EventArgs e) {
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92 | toolTip.SetToolTip(instancesComboBox, String.Empty);
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93 | if (instancesComboBox.SelectedIndex >= 0) {
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94 | var descriptor = (IDataDescriptor)instancesComboBox.SelectedItem;
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95 |
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96 | IContentView activeView = (IContentView)MainFormManager.MainForm.ActiveView;
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97 | var mainForm = (MainForm.WindowsForms.MainForm)MainFormManager.MainForm;
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98 | // lock active view and show progress bar
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99 | mainForm.AddOperationProgressToContent(activeView.Content, "Loading problem instance.");
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100 | // continuation for removing the progess bar from the active view
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101 | Action<Task> removeProgressFromContent = (_) => mainForm.RemoveOperationProgressFromContent(activeView.Content);
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102 |
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103 | // task structure:
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104 | // loadFromProvider
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105 | // |
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106 | // +-> on fault -> show error dialog -> remove progress bar
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107 | // |
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108 | // `-> success -> loadToProblem
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109 | // |
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110 | // +-> on fault -> show error dialog -> remove progress bar
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111 | // |
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112 | // `-> success -> set tool tip -> remove progress bar
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113 | var loadFromProvider = new Task<T>(() => Content.LoadData(descriptor));
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114 |
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115 | // success
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116 | var loadToProblem = loadFromProvider
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117 | .ContinueWith(task => GenericConsumer.Load(task.Result), TaskContinuationOptions.OnlyOnRanToCompletion);
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118 | // on error
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119 | loadFromProvider
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120 | .ContinueWith(task => { ErrorHandling.ShowErrorDialog(String.Format("Could not load the problem instance {0}", descriptor.Name), task.Exception); }, TaskContinuationOptions.OnlyOnFaulted)
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121 | .ContinueWith(removeProgressFromContent);
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122 |
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123 | // success
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124 | loadToProblem
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125 | .ContinueWith(task => toolTip.SetToolTip(instancesComboBox, descriptor.Description), TaskContinuationOptions.OnlyOnRanToCompletion)
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126 | .ContinueWith(removeProgressFromContent);
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127 | // on error
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128 | loadToProblem.ContinueWith(task => { ErrorHandling.ShowErrorDialog(String.Format("This problem does not support loading the instance {0}", descriptor.Name), task.Exception); }, TaskContinuationOptions.OnlyOnFaulted)
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129 | .ContinueWith(removeProgressFromContent);
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130 |
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131 | // start async loading task
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132 | loadFromProvider.Start();
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133 | }
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134 | }
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135 | }
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136 | }
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