# MIT License
#
# Copyright (c) 2021 Eugenio Parodi <ceccopierangiolieugenio AT googlemail DOT com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
__all__ = ['TTkCheckbox']
from TermTk.TTkCore.constant import TTkK
from TermTk.TTkCore.cfg import TTkCfg
from TermTk.TTkCore.color import TTkColor
from TermTk.TTkCore.canvas import TTkCanvas
from TermTk.TTkCore.string import TTkString
from TermTk.TTkCore.signal import pyTTkSignal, pyTTkSlot
from TermTk.TTkCore.TTkTerm.inputkey import TTkKeyEvent
from TermTk.TTkCore.TTkTerm.inputmouse import TTkMouseEvent
from TermTk.TTkWidgets.widget import *
[docs]
class TTkCheckbox(TTkWidget):
'''
**Checked**
::
[X]CheckBox
**Unchecked**
::
[ ]CheckBox
**Partially Checked**
::
[/]CheckBox
:Demo: `formwidgets.py <https://github.com/ceccopierangiolieugenio/pyTermTk/blob/main/demo/showcase/formwidgets.py>`_
'''
clicked:pyTTkSignal
'''
This signal is emitted when the button is activated
'''
toggled:pyTTkSignal
'''
This signal is emitted whenever the button state changes if checkeable,
i.e., whenever the user checks or unchecks it.
:param checked: True if checked otherwise False
:type checked: bool
'''
stateChanged:pyTTkSignal
'''
This signal is emitted whenever the checkbox's state changes,
i.e., whenever the user checks or unchecks it.
:param state: state of the checkbox
:type state: :py:class:`TTkK.CheckState`
'''
classStyle = {
'default': {'color': TTkColor.RST,
'borderColor':TTkColor.RST,
'cbContentColor': TTkColor.fg("#dddd88")+TTkColor.bg("#000044")},
'disabled': {'color': TTkColor.fg('#888888'),
'borderColor':TTkColor.fg('#888888'),
'cbContentColor': TTkColor.fg('#888888')},
'focus': {'color': TTkColor.fg("#dddd88")+TTkColor.bg("#000044")+TTkColor.BOLD,
'borderColor': TTkColor.fg("#ffff00") + TTkColor.BOLD,
'cbContentColor': TTkColor.fg("#dddd88")+TTkColor.bg("#000044")+TTkColor.BOLD},
}
__slots__ = (
'_checkStatus', '_text', '_tristate',
# Signals
'clicked', 'stateChanged', 'toggled'
)
def __init__(self, *,
text:TTkString='',
checked:bool=False,
checkStatus:TTkK.CheckState = None,
tristate:bool=False,
**kwargs) -> None:
'''
:param str text: the text shown on the checkbox, defaults to ""
:type text: str, optional
:param checked: Checked status, defaults to "False"
:type checked: bool, optional
:param checkStatus: If defined, override the option defined in the 'checked' field otherwise defaults to :py:class:`TTkK.CheckState.Checked` or :py:class:`TTkK.CheckState.Unchecked` based on the checked status
:type checkStatus: :py:class:`TTkK.CheckState` , optional
:param tristate: Tristate status, if enabled the checkbox is able to assume the :py:class:`TTkK.CheckState.PartiallyChecked` status, defaults to "False"
:type tristate: bool, optional
'''
# Define Signals
self.stateChanged = pyTTkSignal(TTkK.CheckState)
self.clicked = pyTTkSignal(bool)
self.toggled = pyTTkSignal(bool)
self._text = TTkString(text)
if checkStatus != None :
self._checkStatus = checkStatus
else:
self._checkStatus = TTkK.Checked if checked else TTkK.Unchecked
self._tristate = tristate
super().__init__(**kwargs)
self.setMinimumSize(3 + len(self._text), 1)
self.setMaximumHeight(1)
self.setFocusPolicy(TTkK.ClickFocus + TTkK.TabFocus)
[docs]
def text(self) -> TTkString:
''' This property holds the text shown on the checkhox
:return: :py:class:`TTkString`
'''
return self._text
pyTTkSlot(str)
[docs]
def setText(self, text:TTkString) -> None:
''' This property holds the text shown on the checkhox
:param text:
:type text: :py:class:`TTkString`
'''
if self._text.sameAs(text): return
self._text = TTkString(text)
self.setMinimumSize(3 + len(self._text), 1)
self.update()
[docs]
def isTristate(self) -> bool:
''' This property holds whether the checkbox is a tri-state checkbox
:return: bool
'''
return self._tristate
[docs]
def setTristate(self, tristate:bool):
''' Enable/Disable the tristate property
:param tristate:
:type tristate: bool
'''
if tristate == self._tristate: return
self._tristate = tristate
self.update()
[docs]
def isChecked(self) -> bool:
''' This property holds whether the checkbox is checked
:return: bool - True if :py:class:`~TermTk.TTkCore.constant.TTkConstant.CheckState.Checked` or :py:class:`~TermTk.TTkCore.constant.TTkConstant.CheckState.PartiallyChecked`
'''
return self._checkStatus != TTkK.Unchecked
[docs]
@pyTTkSlot(bool)
def setChecked(self, state:bool) -> None:
''' Set the check status
:param state:
:type state: bool
'''
self.setCheckState(TTkK.Checked if state else TTkK.Unchecked)
[docs]
def checkState(self) -> TTkK.CheckState:
''' Retrieve the state of the checkbox
:return: :py:class:`TTkConstant.CheckState` : the checkbox status
'''
return self._checkStatus
[docs]
@pyTTkSlot(TTkK.CheckState)
def setCheckState(self, state:TTkK.CheckState) -> None:
''' Sets the checkbox's check state.
:param state: state of the checkbox
:type state: :py:class:`TTkConstant.CheckState`
'''
if self._checkStatus == state: return
if state==TTkK.PartiallyChecked and not self._tristate: return
self._checkStatus = state
self.update()
def paintEvent(self, canvas: TTkCanvas) -> None:
style = self.currentStyle()
borderColor = style['borderColor']
textColor = style['color']
xColor = style['cbContentColor']
canvas.drawText(pos=(0,0), color=borderColor ,text="[ ]")
canvas.drawText(pos=(3,0), color=textColor ,text=self._text)
text = {
TTkK.Checked : "X",
TTkK.Unchecked : " ",
TTkK.PartiallyChecked: "/"}.get(self._checkStatus, " ")
canvas.drawText(pos=(1,0), color=xColor ,text=text)
def _pressEvent(self) -> bool:
self._checkStatus = {
TTkK.Unchecked: TTkK.PartiallyChecked,
TTkK.PartiallyChecked: TTkK.Checked,
TTkK.Checked: TTkK.Unchecked,
}.get(self._checkStatus,TTkK.Unchecked)
if not self._tristate and self._checkStatus == TTkK.PartiallyChecked:
self._checkStatus = TTkK.Checked
self.clicked.emit(self._checkStatus!=TTkK.Unchecked)
self.toggled.emit(self._checkStatus!=TTkK.Unchecked)
self.stateChanged.emit(self._checkStatus)
self.update()
return True
def mousePressEvent(self, evt: TTkMouseEvent) -> bool:
self._pressEvent()
return True
def keyEvent(self, evt: TTkKeyEvent) -> bool:
if ( evt.type == TTkK.Character and evt.key==" " ) or \
( evt.type == TTkK.SpecialKey and evt.key == TTkK.Key_Enter ):
self._pressEvent()
return True
return False