Mercurial > servermonitor

annotate ServerMonitor/Controls/CheckControl.cs @ 19:b3128fe10d57

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Add About form and license.
author Brad Greco <brad@bgreco.net>
date Wed, 29 May 2019 20:18:37 -0400
parents 7127d5b5ac75
children
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1 using System;
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2 using System.Collections.Generic;
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3 using System.Data;
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4 using System.Linq;
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5 using System.Windows.Forms;
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6
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7 namespace ServerMonitorApp
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8 {
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9 /// <summary>Base class for check controls.</summary>
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10 /// <remarks>This control should never be used directly, but marking it abstract causes problems with the designer.</remarks>
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11 public partial class CheckControl : UserControl
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12 {
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13 /// <summary>Type of the check this control can edit.</summary>
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14 public Type CheckType => GetCheckType(GetType());
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16 public CheckControl()
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17 {
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18 InitializeComponent();
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19 }
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20
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21 private void CheckControl_Load(object sender, EventArgs e)
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22 {
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23 CheckGroupBox.Text = Helpers.GetDisplayName(CheckType);
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24
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25 // Bind change listeners to checkboxes to enable or disable a panel of controls.
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26 // The leftmost checkbox is assumed to be the "master switch" for the panel.
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27 IEnumerable<Panel> panels = CheckGroupBox.Controls.OfType<Panel>();
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28 foreach (Panel panel in panels)
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29 {
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30 CheckBox mainCheckBox = panel.Controls.OfType<CheckBox>().OrderBy(c => c.Left).FirstOrDefault();
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31 if (mainCheckBox != null)
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32 {
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33 mainCheckBox.CheckedChanged += CheckControl_CheckedChanged;
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34 DisablePanelByCheckBox(mainCheckBox);
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35 }
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36 }
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37 }
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38
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39 private void CheckControl_CheckedChanged(object sender, EventArgs e)
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40 {
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41 DisablePanelByCheckBox((CheckBox)sender);
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42 }
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43
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44 /// <summary>Enables or disables all sibling controls of a checkbox.</summary>
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45 /// <param name="checkBox">The checkbox to disable or enable the sibling controls of.</param>
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46 private void DisablePanelByCheckBox(CheckBox checkBox)
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47 {
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48 foreach (Control control in checkBox.Parent.Controls)
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49 {
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50 if (control != checkBox)
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51 control.Enabled = checkBox.Checked;
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52 }
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53 }
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54
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55 /// <summary>Sets the values of the controls from a check's properties.</summary>
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56 /// <remarks>Subclasses should implement this method. Marking as abstract causes problems with the designer.</remarks>
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57 public virtual void LoadCheck(Check check) { }
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58
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59 /// <summary>Updates the properties of a check from user input.</summary>
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60 /// <remarks>Subclasses should implement this method. Marking as abstract causes problems with the designer.</remarks>
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61 public virtual void UpdateCheck(Check check) { }
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63 /// <summary>Creates an instance of a check control based on a check type.</summary>
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64 public static CheckControl Create(Type CheckType)
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65 {
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66 // Use reflection to find a check control that declares it handles the given type.
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67 Type checkControlType = typeof(CheckControl).Assembly.GetTypes().FirstOrDefault(t => GetCheckType(t) == CheckType);
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68 // If one was found, instantiate it.
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69 return checkControlType == null ? null : (CheckControl)Activator.CreateInstance(checkControlType);
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70 }
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72 /// <summary>Gets the value of the CheckTypeAttribute for a type.</summary>
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73 private static Type GetCheckType(Type type)
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74 {
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75 return type.GetAttribute<CheckTypeAttribute>()?.CheckType;
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76 }
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77 }
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78 }