/// <summary>
/// Private constructor. Initializes the HotkeyHandler with the supplied preset to
/// hotkey mapping and message filter.
/// </summary>
/// <param name="presetToHotkeyMap">Mapping of presets to hotkeys.</param>
/// <param name="hotkeyMessageFilter">Message filter that notifies subscribers when a global hotkey for this app has occurred.</param>
private HotkeyHandler(PresetToHotkeyMap presetToHotkeyMap, HotkeyMessageFilter hotkeyMessageFilter)
{
mPresetToHotkeyMap = presetToHotkeyMap;
mHotkeyMessageFilter = hotkeyMessageFilter;
mHotkeyMessageFilter.PresetSwitchHotkeyPressed += OnPresetSwitchHotkeyPressed;
}
/// <summary>
/// Initializes the singleton instance of HotkeyHandler with the supplied
/// preset to hotkey mappings, and the message filter that receives global
/// hotkey events.
/// </summary>
/// <param name="presetToHotkeyMap">Mapping of presets to hotkeys.</param>
/// <param name="hotkeyMessageFilter">Message filter that notifies subscribers when a global hotkey for this app has occurred.</param>
public static void Initialize(PresetToHotkeyMap presetToHotkeyMap, HotkeyMessageFilter hotkeyMessageFilter)
{
if (mInstance == null)
{
mInstance = new HotkeyHandler(presetToHotkeyMap, hotkeyMessageFilter);
}
else
{
throw new Exception("Unexpected reiniitalization of Hotkey Handler");
}
}
/// <summary>
/// Initializes global hotkey infrastructure.
/// </summary>
private void InitializeHotkey()
{
mMessageFilter = new HotkeyMessageFilter();
HotkeyRegistrar.Initialize(PresetToHotkeyMap.GetInstance());
HotkeyHandler.Initialize(PresetToHotkeyMap.GetInstance(), mMessageFilter);
// Technically this can degrade performance, but we're not doing a ton of work in there.
// Just have to make sure it's non-blocking.
Application.AddMessageFilter(mMessageFilter);
}