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Calculadora: capturando teclas ENTER, Backspace e ESC

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This commit is contained in:
Luiz Otávio
2023-03-04 07:35:02 -03:00
parent 8afa43dc61
commit e107d671b0
2 changed files with 27 additions and 3 deletions
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4
aula202-calculadora/buttons.py
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@@ -63,7 +63,9 @@ class ButtonsGrid(QGridLayout):
print('Signal recebido por "vouApagarVocê" em', type(self).__name__) print('Signal recebido por "vouApagarVocê" em', type(self).__name__)
def _makeGrid(self): def _makeGrid(self):
self.display.eqRequested.connect(self.vouApagarVocê) self.display.eqPressed.connect(self.vouApagarVocê)
self.display.delPressed.connect(self.display.backspace)
self.display.clearPressed.connect(self.vouApagarVocê)
for rowNumber, rowData in enumerate(self._gridMask): for rowNumber, rowData in enumerate(self._gridMask):
for colNumber, buttonText in enumerate(rowData): for colNumber, buttonText in enumerate(rowData):

26
aula202-calculadora/display.py
View File

@@ -1,11 +1,14 @@
from PySide6.QtCore import Qt, Signal from PySide6.QtCore import Qt, Signal
from PySide6.QtGui import QKeyEvent from PySide6.QtGui import QKeyEvent
from PySide6.QtWidgets import QLineEdit from PySide6.QtWidgets import QLineEdit
from utils import isEmpty
from variables import BIG_FONT_SIZE, MINIMUM_WIDTH, TEXT_MARGIN from variables import BIG_FONT_SIZE, MINIMUM_WIDTH, TEXT_MARGIN
class Display(QLineEdit): class Display(QLineEdit):
eqRequested = Signal() eqPressed = Signal()
delPressed = Signal()
clearPressed = Signal()
def __init__(self, *args, **kwargs): def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs) super().__init__(*args, **kwargs)
@@ -20,12 +23,31 @@ class Display(QLineEdit):
self.setTextMargins(*margins) self.setTextMargins(*margins)
def keyPressEvent(self, event: QKeyEvent) -> None: def keyPressEvent(self, event: QKeyEvent) -> None:
text = event.text().strip()
key = event.key() key = event.key()
KEYS = Qt.Key KEYS = Qt.Key
isEnter = key in [KEYS.Key_Enter, KEYS.Key_Return] isEnter = key in [KEYS.Key_Enter, KEYS.Key_Return]
isDelete = key in [KEYS.Key_Backspace, KEYS.Key_Delete]
isEsc = key in [KEYS.Key_Escape]
if isEnter: if isEnter:
print('Enter pressionado, sinal emitido', type(self).__name__) print('Enter pressionado, sinal emitido', type(self).__name__)
self.eqRequested.emit() self.eqPressed.emit()
return event.ignore() return event.ignore()
if isDelete:
print('isDelete pressionado, sinal emitido', type(self).__name__)
self.delPressed.emit()
return event.ignore()
if isEsc:
print('isEsc pressionado, sinal emitido', type(self).__name__)
self.clearPressed.emit()
return event.ignore()
# Não passar daqui se não tiver texto
if isEmpty(text):
return event.ignore()
print('Texto', text)