我想给一个在TextField中输入的图标一个功能,我想给它一个典型的函数,该函数具有密码的“ eye-off”图标,当您按下该图标时,将功能“ password”更改为False然后将图标更改为“ eye-on”,如果再次按下该按钮,则将其更改为True,然后将图标恢复为“ eye-off”,请允许我解释一下,这是我的主要代码:
from kivymd.app import MDApp
from kivymd.uix.screen import Screen
from kivymd.uix.button import MDRectangleFlatButton, MDIconButton
from kivy.lang import Builder
from helpers import *
class DemoApp(MDApp):
def build(self):
screen = Screen()
self.theme_cls.primary_palette = 'Yellow'
self.theme_cls.theme_style = 'Dark'
btn = MDRectangleFlatButton(text='Confirmar', pos_hint= {'center_x': 0.5, 'center_y': 0.35},
on_release= self.show_data)
self.username = Builder.load_string(username_helper)
self.contraseña = Builder.load_string(contraseña_helper)
screen.add_widget(self.username)
screen.add_widget(self.contraseña)
screen.add_widget(btn)
return screen
def show_data(self, obj):
print(f'Usuario: {self.username.text}\nContraseña: {self.contraseña.text}')
if __name__=='__main__':
DemoApp().run()
在这里,我的文件处于字符串模式,这是我导入的帮助程序模块:
username_helper = '''
MDTextField:
hint_text: 'Usuario'
required: True
helper_text: 'Enter text'
helper_text_mode: 'on_error'
pos_hint: {'center_x': 0.5, 'center_y': 0.5}
size_hint_x: None
width: 200
'''
contraseña_helper = '''
MDTextField:
hint_text: 'Contraseña'
password: True
icon_right: "eye-off"
pos_hint: {'center_x': 0.5, 'center_y':0.43}
size_hint_x: None
width: 200
'''
在这种配置下,输入密码时,一些字符串带有星号出现,但是我希望通过按右侧的“ eye-off”图标来看到正在输入的字符串,如果我再次按下它,再次用'*'隐藏,以此类推。
答案 0 :(得分:0)
您可以通过扩展MDTextField
来做到这一点:
class MyMDTextField(MDTextField):
password_mode = BooleanProperty(True)
def on_touch_down(self, touch):
if self.collide_point(*touch.pos):
if self.icon_right:
# icon position based on the KV code for MDTextField
icon_x = (self.width + self.x) - (self._lbl_icon_right.texture_size[1]) - dp(8)
icon_y = self.center[1] - self._lbl_icon_right.texture_size[1] / 2
if self.mode == "rectangle":
icon_y -= dp(4)
elif self.mode != 'fill':
icon_y += dp(8)
# not a complete bounding box test, but should be sufficient
if touch.pos[0] > icon_x and touch.pos[1] > icon_y:
if self.password_mode:
self.icon_right = 'eye'
self.password_mode = False
self.password = self.password_mode
else:
self.icon_right = 'eye-off'
self.password_mode = True
self.password = self.password_mode
# try to adjust cursor position
cursor = self.cursor
self.cursor = (0,0)
Clock.schedule_once(partial(self.set_cursor, cursor))
return super(MyMDTextField, self).on_touch_down(touch)
def set_cursor(self, pos, dt):
self.cursor = pos
这将覆盖on_touch_down()
的{{1}}方法,并检查图标附近是否发生触摸。如果是这样,它将切换图标和MDTextField
的{{1}}设置。
您可以在password
中以以下方式使用它:
MDTextField