/// <summary>
/// Handle the KeyDown of tbHotKey. In this event handler, check the pressed keys.
/// The keys that must be pressed in combination with the key Ctrl, Shift or Alt,
/// like Ctrl+Alt+T. The method HotKeyRegister.GetModifiers could check whether
/// "T" is pressed.
/// </summary>
private void tbHotKey_KeyDown(object sender, KeyEventArgs e)
{
// The key event should not be sent to the underlying control.
e.SuppressKeyPress = true;
// Check whether the modifier keys are pressed.
if (e.Modifiers != Keys.None)
{
Keys key = Keys.None;
KeyModifiers modifiers = HotKeyRegister.GetModifiers(e.KeyData, out key);
// If the pressed key is valid...
if (key != Keys.None)
{
this.registerKey = key;
this.registerModifiers = modifiers;
// Display the pressed key in the textbox.
tbHotKey.Text = string.Format("{0}+{1}",
this.registerModifiers, this.registerKey);
// Enable the button.
btnRegister.Enabled = true;
}
}
}
/// <summary>
/// Handle the Click event of btnRegister.
/// </summary>
private void btnRegister_Click(object sender, EventArgs e)
{
try
{
// Register the hotkey.
hotKeyToRegister = new HotKeyRegister(this.Handle, 100,
this.registerModifiers, this.registerKey);
// Register the HotKeyPressed event.
hotKeyToRegister.HotKeyPressed += new EventHandler(HotKeyPressed);
// Update the UI.
btnRegister.Enabled = false;
tbHotKey.Enabled = false;
btnUnregister.Enabled = true;
}
catch (ArgumentException argumentException)
{
MessageBox.Show(argumentException.Message);
}
catch (ApplicationException applicationException)
{
MessageBox.Show(applicationException.Message);
}
}
/// <summary>
/// 处理tbHotKey的KeyDown，事件处理中要检查按键。
/// 按键必须是包含Ctrl，Shift或者Alt键的，比如Ctrl+Alt+T，HotKeyRegister.GetMo-
///difiers方法能够检查是否“T”按键被按了。
/// </summary>
private void tbHotKey_KeyDown(object sender, KeyEventArgs e)
{
// 按键事件不应该被发送到底层控制。
e.SuppressKeyPress = true;
// 检查修饰键是否被按下。
if (e.Modifiers != Keys.None)
{
Keys key = Keys.None;
KeyModifiers modifiers = HotKeyRegister.GetModifiers(e.KeyData, out key);
// 如果按下的按键是有效的。
if (key != Keys.None)
{
this.registerKey = key;
this.registerModifiers = modifiers;
// 在文本框中显示按下的按键。
tbHotKey.Text = string.Format("{0}+{1}",
this.registerModifiers, this.registerKey);
// 启动按钮。
btnRegister.Enabled = true;
}
}
}
/// <summary>
/// 处理btnRegister的Click事件。
/// </summary>
private void btnRegister_Click(object sender, EventArgs e)
{
try
{
// 注册热键。
hotKeyToRegister = new HotKeyRegister(this.Handle, 100,
this.registerModifiers, this.registerKey);
// 注册热键事件。
hotKeyToRegister.HotKeyPressed += new EventHandler(HotKeyPressed);
// 更新界面。
btnRegister.Enabled = false;
tbHotKey.Enabled = false;
btnUnregister.Enabled = true;
}
catch (ArgumentException argumentException)
{
MessageBox.Show(argumentException.Message);
}
catch (ApplicationException applicationException)
{
MessageBox.Show(applicationException.Message);
}
}
/// <summary>
/// Dispose the hotKeyToRegister when the form is closed.
/// </summary>
protected override void OnClosed(EventArgs e)
{
if (hotKeyToRegister != null)
{
hotKeyToRegister.Dispose();
hotKeyToRegister = null;
}
base.OnClosed(e);
}
/// <summary>
/// 当窗体关闭的时候处理hotKeyToRegister。
/// </summary>
protected override void OnClosed(EventArgs e)
{
if (hotKeyToRegister != null)
{
hotKeyToRegister.Dispose();
hotKeyToRegister = null;
}
base.OnClosed(e);
}
/// <summary>
/// Handle the Click event of btnUnregister.
/// </summary>
private void btnUnregister_Click(object sender, EventArgs e)
{
// Dispose the hotKeyToRegister.
if (hotKeyToRegister != null)
{
hotKeyToRegister.Dispose();
hotKeyToRegister = null;
}
// Update the UI.
tbHotKey.Enabled = true;
btnRegister.Enabled = true;
btnUnregister.Enabled = false;
}
/// <summary>
/// 处理btnUnregister的Click事件。
/// </summary>
private void btnUnregister_Click(object sender, EventArgs e)
{
// 处理hotKeyToRegister。
if (hotKeyToRegister != null)
{
hotKeyToRegister.Dispose();
hotKeyToRegister = null;
}
// 更新界面。
tbHotKey.Enabled = true;
btnRegister.Enabled = true;
btnUnregister.Enabled = false;
}
/// <summary>
/// 处理btnUnregister的Click事件。
/// </summary>
private void btnUnregister_Click(object sender, EventArgs e)
{
// 处理hotKeyToRegister。
if (hotKeyToRegister != null)
{
hotKeyToRegister.Dispose();
hotKeyToRegister = null;
}
// 更新界面。
tbHotKey.Enabled = true;
btnRegister.Enabled = true;
btnUnregister.Enabled = false;
}
