annotate ServerMonitor/Forms/QuickHelpForm.cs @ 23:3866c19535fd

Fix NullReferenceException when checks are executed on a brand new server.
author Brad Greco <brad@bgreco.net>
date Thu, 30 May 2019 21:40:27 -0400
parents 2db36ab759de
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 using System;
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2 using System.Drawing;
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3 using System.Windows.Forms;
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4
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5 namespace ServerMonitorApp
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6 {
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7 /// <summary>Form for showing help text in a floating popup.</summary>
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8 public partial class QuickHelpForm : Form
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9 {
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10 private string Rtf;
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11
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12 public QuickHelpForm()
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13 {
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14 InitializeComponent();
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15 }
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17 /// <summary>Creates a help popup form with the provided text.</summary>
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18 /// <param name="rtf">Text to show in the popup in RTF format.</param>
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19 public QuickHelpForm(string rtf)
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20 {
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21 InitializeComponent();
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22 Rtf = rtf;
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23 }
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24
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25 private void QuickHelpForm_Load(object sender, EventArgs e)
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26 {
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27 // Subscribe to the owner's notifications that the location of
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28 // the Help button that triggered this popup has changed.
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29 (Owner as CheckForm).HelpLocationChanged += Owner_HelpLocationChanged;
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30 // Subscribe to this event before setting the text box's text
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31 // so we can resize the form to match the text size.
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32 HelpTextBox.ContentsResized += HelpTextBox_ContentsResized;
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33 HelpTextBox.Rtf = Rtf;
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34 }
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36 /// <summary>Resizes the popup form to fit the displayed text.</summary>
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37 private void HelpTextBox_ContentsResized(object sender, ContentsResizedEventArgs e)
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38 {
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39 Height = e.NewRectangle.Height + 12;
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40 }
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41
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42 /// <summary>Moves the popup form to always appear near the Help button that triggered it.</summary>
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43 private void Owner_HelpLocationChanged(object sender, HelpLocationChangedEventArgs e)
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44 {
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45 Point location = e.HelpLocation;
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46 location.Offset(24, 0);
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47 Location = location;
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48 }
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50 // Hides the popup form when ESC is pressed.
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51 private void Control_KeyDown(object sender, KeyEventArgs e)
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52 {
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53 if (e.KeyCode == Keys.Escape)
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54 Close();
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55 }
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57 // Hides the popup form when it is clicked.
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58 private void Control_Click(object sender, EventArgs e)
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59 {
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60 Close();
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61 }
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62 }
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63 }