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-- @docclass
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g_keyboard = {}
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-- private functions
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function translateKeyCombo(keyCombo)
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if not keyCombo or #keyCombo == 0 then return nil end
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local keyComboDesc = ''
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for k,v in pairs(keyCombo) do
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local keyDesc = KeyCodeDescs[v]
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if keyDesc == nil then return nil end
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keyComboDesc = keyComboDesc .. '+' .. keyDesc
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end
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keyComboDesc = keyComboDesc:sub(2)
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return keyComboDesc
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end
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local function getKeyCode(key)
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for keyCode, keyDesc in pairs(KeyCodeDescs) do
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if keyDesc:lower() == key:trim():lower() then
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return keyCode
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end
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end
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end
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function retranslateKeyComboDesc(keyComboDesc)
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if keyComboDesc == nil then
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error('Unable to translate key combo \'' .. keyComboDesc .. '\'')
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end
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if type(keyComboDesc) == 'number' then
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keyComboDesc = tostring(keyComboDesc)
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end
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local keyCombo = {}
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for i,currentKeyDesc in ipairs(keyComboDesc:split('+')) do
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for keyCode, keyDesc in pairs(KeyCodeDescs) do
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if keyDesc:lower() == currentKeyDesc:trim():lower() then
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table.insert(keyCombo, keyCode)
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end
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end
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end
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return translateKeyCombo(keyCombo)
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end
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function determineKeyComboDesc(keyCode, keyboardModifiers)
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local keyCombo = {}
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if keyCode == KeyCtrl or keyCode == KeyShift or keyCode == KeyAlt then
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table.insert(keyCombo, keyCode)
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elseif KeyCodeDescs[keyCode] ~= nil then
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if keyboardModifiers == KeyboardCtrlModifier then
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table.insert(keyCombo, KeyCtrl)
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elseif keyboardModifiers == KeyboardAltModifier then
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table.insert(keyCombo, KeyAlt)
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elseif keyboardModifiers == KeyboardCtrlAltModifier then
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table.insert(keyCombo, KeyCtrl)
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table.insert(keyCombo, KeyAlt)
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elseif keyboardModifiers == KeyboardShiftModifier then
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table.insert(keyCombo, KeyShift)
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elseif keyboardModifiers == KeyboardCtrlShiftModifier then
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table.insert(keyCombo, KeyCtrl)
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table.insert(keyCombo, KeyShift)
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elseif keyboardModifiers == KeyboardAltShiftModifier then
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table.insert(keyCombo, KeyAlt)
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table.insert(keyCombo, KeyShift)
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elseif keyboardModifiers == KeyboardCtrlAltShiftModifier then
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table.insert(keyCombo, KeyCtrl)
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table.insert(keyCombo, KeyAlt)
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table.insert(keyCombo, KeyShift)
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end
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table.insert(keyCombo, keyCode)
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end
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return translateKeyCombo(keyCombo)
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end
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local function onWidgetKeyDown(widget, keyCode, keyboardModifiers)
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if keyCode == KeyUnknown then return false end
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local callback = widget.boundAloneKeyDownCombos[determineKeyComboDesc(keyCode, KeyboardNoModifier)]
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signalcall(callback, widget, keyCode)
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callback = widget.boundKeyDownCombos[determineKeyComboDesc(keyCode, keyboardModifiers)]
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return signalcall(callback, widget, keyCode)
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end
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local function onWidgetKeyUp(widget, keyCode, keyboardModifiers)
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if keyCode == KeyUnknown then return false end
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local callback = widget.boundAloneKeyUpCombos[determineKeyComboDesc(keyCode, KeyboardNoModifier)]
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signalcall(callback, widget, keyCode)
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callback = widget.boundKeyUpCombos[determineKeyComboDesc(keyCode, keyboardModifiers)]
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return signalcall(callback, widget, keyCode)
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end
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local function onWidgetKeyPress(widget, keyCode, keyboardModifiers, autoRepeatTicks)
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if keyCode == KeyUnknown then return false end
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local callback = widget.boundKeyPressCombos[determineKeyComboDesc(keyCode, keyboardModifiers)]
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return signalcall(callback, widget, keyCode, autoRepeatTicks)
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end
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local function connectKeyDownEvent(widget)
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if widget.boundKeyDownCombos then return end
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connect(widget, { onKeyDown = onWidgetKeyDown })
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widget.boundKeyDownCombos = {}
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widget.boundAloneKeyDownCombos = {}
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end
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local function connectKeyUpEvent(widget)
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if widget.boundKeyUpCombos then return end
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connect(widget, { onKeyUp = onWidgetKeyUp })
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widget.boundKeyUpCombos = {}
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widget.boundAloneKeyUpCombos = {}
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end
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local function connectKeyPressEvent(widget)
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if widget.boundKeyPressCombos then return end
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connect(widget, { onKeyPress = onWidgetKeyPress })
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widget.boundKeyPressCombos = {}
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end
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-- public functions
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function g_keyboard.bindKeyDown(keyComboDesc, callback, widget, alone)
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widget = widget or rootWidget
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connectKeyDownEvent(widget)
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local keyComboDesc = retranslateKeyComboDesc(keyComboDesc)
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if alone then
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connect(widget.boundAloneKeyDownCombos, keyComboDesc, callback)
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else
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connect(widget.boundKeyDownCombos, keyComboDesc, callback)
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end
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end
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function g_keyboard.bindKeyUp(keyComboDesc, callback, widget, alone)
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widget = widget or rootWidget
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connectKeyUpEvent(widget)
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local keyComboDesc = retranslateKeyComboDesc(keyComboDesc)
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if alone then
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connect(widget.boundAloneKeyUpCombos, keyComboDesc, callback)
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else
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connect(widget.boundKeyUpCombos, keyComboDesc, callback)
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end
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end
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function g_keyboard.bindKeyPress(keyComboDesc, callback, widget)
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widget = widget or rootWidget
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connectKeyPressEvent(widget)
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local keyComboDesc = retranslateKeyComboDesc(keyComboDesc)
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connect(widget.boundKeyPressCombos, keyComboDesc, callback)
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end
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local function getUnbindArgs(arg1, arg2)
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local callback
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local widget
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if type(arg1) == 'function' then callback = arg1
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elseif type(arg2) == 'function' then callback = arg2 end
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if type(arg1) == 'userdata' then widget = arg1
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elseif type(arg2) == 'userdata' then widget = arg2 end
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widget = widget or rootWidget
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return callback, widget
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end
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function g_keyboard.unbindKeyDown(keyComboDesc, arg1, arg2)
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local callback, widget = getUnbindArgs(arg1, arg2)
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if widget.boundKeyDownCombos == nil then return end
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local keyComboDesc = retranslateKeyComboDesc(keyComboDesc)
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disconnect(widget.boundKeyDownCombos, keyComboDesc, callback)
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end
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function g_keyboard.unbindKeyUp(keyComboDesc, arg1, arg2)
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local callback, widget = getUnbindArgs(arg1, arg2)
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if widget.boundKeyUpCombos == nil then return end
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local keyComboDesc = retranslateKeyComboDesc(keyComboDesc)
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disconnect(widget.boundKeyUpCombos, keyComboDesc, callback)
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end
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function g_keyboard.unbindKeyPress(keyComboDesc, arg1, arg2)
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local callback, widget = getUnbindArgs(arg1, arg2)
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if widget.boundKeyPressCombos == nil then return end
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local keyComboDesc = retranslateKeyComboDesc(keyComboDesc)
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disconnect(widget.boundKeyPressCombos, keyComboDesc, callback)
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end
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function g_keyboard.getModifiers()
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return g_window.getKeyboardModifiers()
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end
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function g_keyboard.isKeyPressed(key)
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if type(key) == 'string' then
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key = getKeyCode(key)
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end
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return g_window.isKeyPressed(key)
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end
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function g_keyboard.areKeysPressed(keyComboDesc)
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for i,currentKeyDesc in ipairs(keyComboDesc:split('+')) do
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for keyCode, keyDesc in pairs(KeyCodeDescs) do
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if keyDesc:lower() == currentKeyDesc:trim():lower() then
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if keyDesc:lower() == "ctrl" then
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if not g_keyboard.isCtrlPressed() then
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return false
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end
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elseif keyDesc:lower() == "shift" then
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if not g_keyboard.isShiftPressed() then
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return false
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end
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elseif keyDesc:lower() == "alt" then
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if not g_keyboard.isAltPressed() then
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return false
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end
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elseif not g_window.isKeyPressed(keyCode) then
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return false
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end
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end
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end
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end
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return true
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end
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function g_keyboard.isKeySetPressed(keys, all)
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all = all or false
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local result = {}
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for k,v in pairs(keys) do
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if type(v) == 'string' then
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v = getKeyCode(v)
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end
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if g_window.isKeyPressed(v) then
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if not all then
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return true
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end
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table.insert(result, true)
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end
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end
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return #result == #keys
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end
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function g_keyboard.isInUse()
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for i = FirstKey, LastKey do
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if g_window.isKeyPressed(key) then
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return true
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end
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end
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return false
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end
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function g_keyboard.isCtrlPressed()
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return bit32.band(g_window.getKeyboardModifiers(), KeyboardCtrlModifier) ~= 0
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end
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function g_keyboard.isAltPressed()
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return bit32.band(g_window.getKeyboardModifiers(), KeyboardAltModifier) ~= 0
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end
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function g_keyboard.isShiftPressed()
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return bit32.band(g_window.getKeyboardModifiers(), KeyboardShiftModifier) ~= 0
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end
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