private CurrentCommandsContainer GetChordCombinations(ModifierKeys modifierKeys, Key key)
{
// Filter command infos by specific modifier keys and key
// And find in them only chord combinations
Debug.Assert(modifierKeys != ModifierKeys.None, "modifierKeys != ModifierKeys.None");
var commandsSet = new CurrentCommandsContainer(this.packageSettings);
foreach (var scope in this.commandScopeService.GetCurrentScopes())
{
foreach (var commandInfo in this.commandInfos.Filter(modifierKeys, scope, key))
{
CommandBinding commandBinding = commandInfo.CommandBinding;
if (commandBinding.KeyCombinations.Length == 1)
{
return(null);
}
commandsSet.Add(commandInfo.Name, commandBinding.Scope, commandBinding.KeyCombinations[1]);
}
}
return(commandsSet);
}
private CurrentCommandsContainer GetCombinations(ModifierKeys modifierKeys)
{
// Get combinations for pressed modifier keys
if (modifierKeys == ModifierKeys.None)
{
return(null);
}
var currentCommandsSet = new CurrentCommandsContainer(this.packageSettings);
foreach (var scope in this.commandScopeService.GetCurrentScopes())
{
foreach (var commandInfo in this.commandInfos.Filter(modifierKeys, scope))
{
CommandBinding commandBinding = commandInfo.CommandBinding;
if (commandBinding.KeyCombinations.Length == 1)
{
currentCommandsSet.Add(commandInfo.Name, commandBinding.Scope, commandBinding.KeyCombinations[0]);
}
else
{
currentCommandsSet.AddChordCandidate(commandBinding.KeyCombinations[0]);
}
}
}
return(currentCommandsSet);
}
void ICommandsInfoWindow.SetCombinations(CurrentCommandsContainer commandsContainer)
{
this.Dispatcher.Invoke(
DispatcherPriority.DataBind,
new Action(
() =>
{
IList <KeyCombination> chordCombinations = null;
IList <CommandViewModel> commands = null;
if (commandsContainer != null)
{
chordCombinations = commandsContainer.GetChordCombinations();
commands = commandsContainer.GetCommands();
}
if (chordCombinations != null && chordCombinations.Count > 0)
{
this.chordKeys.Text = string.Join(", ", chordCombinations);
this.chordKeysPanel.Visibility = Visibility.Visible;
}
else
{
this.chordKeys.Text = null;
this.chordKeysPanel.Visibility = Visibility.Collapsed;
}
this.commandsPanel.Commands = commands;
this.IsOpen = (commands != null && commands.Count > 0) ||
(chordCombinations != null && chordCombinations.Count > 0);
}));
}
private void HandleKeyDown(RawKeyEventArgs args)
{
lock (this.locker)
{
var isModifierKeys = KeyExtensions.IsModifierKeys(args.Key);
var modifierKeys = Keyboard.Modifiers;
// If current key down is modifier key and if we are not in chord sequence
// we need to find all chord combinations and possible commands for current modifer keys
if (isModifierKeys && !this.inChordSequence)
{
var fNewModifiersCombination = this.modifiersCombination != modifierKeys;
if (fNewModifiersCombination)
{
this.combinationStart = DateTime.Now;
this.modifiersCombination = modifierKeys;
}
if ((this.window.IsOpen && fNewModifiersCombination) ||
(this.combinationStart.HasValue && (DateTime.Now - this.combinationStart.Value).TotalMilliseconds >= this.keyModifiersCombinationDelay))
{
this.combinationStart = null;
this.window.SetCombinations(this.GetCombinations(modifierKeys));
}
}
else if (!isModifierKeys && modifierKeys != ModifierKeys.None && !this.inChordSequence)
{
this.DisposeTimer();
CurrentCommandsContainer chordCommands = this.GetChordCombinations(modifierKeys, args.Key);
this.inChordSequence = chordCommands != null && chordCommands.HasCommands();
if (this.inChordSequence && !this.window.IsOpen && this.chordCombinationDelay > 0)
{
this.showChordKeyTimer = new Timer(
(state) =>
{
lock (this.locker)
{
if (this.showChordKeyTimer != null)
{
this.DisposeTimer();
this.window.SetCombinations(chordCommands);
}
}
},
null,
this.chordCombinationDelay,
Timeout.Infinite);
}
else
{
this.window.SetCombinations(chordCommands);
}
}
else if (!isModifierKeys && (modifierKeys == ModifierKeys.None || this.inChordSequence))
{
this.inChordSequence = false;
this.DisposeTimer();
// If this is not a modifier keys and user doesn't press any of modifier keys now
// or if this is second combination of chord key we need to hide window if it is open.
if (this.window.IsOpen)
{
this.window.SetCombinations(null);
}
}
}
}
