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我试图在kivy中制作一种基本的照片编辑器。它应该允许放置和转换基本图像以及添加文本标签。我正在使用scatters来实现这个功能，但是我遇到了一个问题，我无法获得根分散符以匹配其子标签或图像的大小。这使得实际拖拽和缩放图像和标签变得困难，因为每个图像和标签周围都有不可见的散射空间，使得实际上不可能拖拽和调整所需的散射。Kivy：使散点图的大小与小孩的标签或图像相同
这里是我的Python代码：
from kivy.app import App
from kivy.uix.scatter import Scatter
from kivy.uix.button import Button
from kivy.uix.popup import Popup
from kivy.uix.scatterlayout import ScatterLayout
from kivy.uix.label import Label
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.anchorlayout import AnchorLayout
from kivy.uix.textinput import TextInput
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.uix.colorpicker import ColorPicker
from kivy.logger import Logger
from kivy.graphics import Color, Ellipse, Line
from kivy.properties import ListProperty
from kivy.properties import NumericProperty
from kivy.properties import ObjectProperty
from kivy.core.window import Window
import os
#from editor import PhotoEditor
import random
#Each class def is a different screen.
class WelcomeScreen(Screen):
pass
class PhoneSelection(Screen):
pass
class StyleSelection(Screen):
pass
class ColorSelection(Screen):
pass
class DesignSelection(Screen):
pass
class UploadPhoto(Screen):
pass
class PatternSelection(Screen):
pass
class PhotoEditor(Screen):
color = ListProperty([1,1,1,1])
word = 'Enter Text'
font_size = 14
font_type = ''
image_path = 'Mike1.png'
erase = False
def open_popup(self):
popup = ColorPopup()
popup.open()
def close_popup(self):
color_bttn = self.ids['color_bttn']
color_bttn.background_color = self.color
color_bttn.color = [1 - self.color[0], 1 - self.color[1], 1 - self.color[2], 1]
def open_text_entry(self):
al = AnchorLayout(anchor_x='center',anchor_y='top')
popup = TextLabelEntry()
al.add_widget(popup)
popup.open()
def close_text_entry(self):
l = Label(text=self.word,color=self.color,font_size=40)
t = TextLabel()
t.add_widget(l)
t.size = l.size
self.ids['il'].add_widget(t)
class Confirm(Screen):
pass
class Pay(Screen):
pass
class ThankYou(Screen):
pass
#These classes are used as parts of the UI for other screens.
class ColorPopup(Popup):
pass
class TextLabel(Scatter):
pass
class TextLabelEntry(Popup):
fonts = []
def font_selector(self):
for file in os.listdir("/mydir"):
if file.endswith(".tff"):
fonts.append(file)
class ImageLabel(ScatterLayout):
pass
class Variables():
#used for storing info about the case to be printed
phone_type = ""
phone_color = ""
phone_style = ""
phone_design_option = ""
total_price = 0.0
#This is the main class that has all the app info.
class MainApp(App):
#Window.size = (1920, 1080)
#Window.fullscreen = True
#list of names for each screen. Each name is used as an ID when changing the current screen.
screens = ["welcome","choose_phone","choose_style","choose_color","choose_design","upload_photo","choose_pattern","photo_edit","confirm","pay","thanks"]
vars = Variables()
#The manager that holds all the screens and allows transitioning between them.
SM = ScreenManager()
def build(self):
#list of names for each screen. Each name is used as an ID when changing the current screen.
screens = ["welcome","choose_phone","choose_style","choose_color","choose_design","upload_photo","choose_pattern","photo_edit","confirm","pay","thanks"]
#Add all screens to the manager and assign the corresponding ID.
self.SM.add_widget(WelcomeScreen(name=screens[0]))
self.SM.add_widget(PhoneSelection(name=screens[1]))
self.SM.add_widget(StyleSelection(name=screens[2]))
self.SM.add_widget(ColorSelection(name=screens[3]))
self.SM.add_widget(DesignSelection(name=screens[4]))
self.SM.add_widget(UploadPhoto(name=screens[5]))
self.SM.add_widget(PatternSelection(name=screens[6]))
self.SM.add_widget(PhotoEditor(name=screens[7]))
self.SM.add_widget(Confirm(name=screens[8]))
self.SM.add_widget(Pay(name=screens[9]))
self.SM.add_widget(ThankYou(name=screens[10]))
#Set the current screen to the welcome screen.
self.SM.current = screens[0]
return self.SM
#Runs the app.
if __name__ == "__main__":
t = MainApp();
t.run()
大部分动作发生在PhotoEditor类。
这是我的kivy代码：
<WelcomeScreen>:
AnchorLayout:
anchor_x: 'center'
anchor_y: 'bottom'
Button:
text: "Welcome!"
size_hint: 0.1,0.1
on_press: root.manager.current = app.screens[7]
<PhoneSelection>:
BoxLayout:
Button:
text: "iPhone 4/4s"
on_press:
root.manager.current = app.screens[1]
app.vars.phone_type = "iPhone YAYAYA"
self.text = str(app.vars.phone_type)
<PhotoEditor>
id: PhotoEditor
FloatLayout:
id: il
ImageLabel:
auto_bring_to_front: False
scale_min: 100/img.width
scale_max: 5000/img.width
id: ilr
Image:
id: img
source: root.image_path
#width: il.width
#height: il.height/self.image_ratio
on_touch_up:
if int(ilr.rotation % 15) < 8: ilr.rotation = int(ilr.rotation - int(ilr.rotation % 15))
if int(ilr.rotation % 15) >= 8: ilr.rotation = int(ilr.rotation - int(ilr.rotation % 15)) + 15
Image:
id: ovrly
source: 'overlay/iphone6.png'
AnchorLayout:
anchor_x: 'left'
anchor_y: 'center'
BoxLayout:
size_hint: 0.1, 0.5
orientation: 'vertical'
Button:
text: 'Color'
color: [1 - root.color[0], 1 - root.color[1], 1 - root.color[2], 1]
background_color: root.color
background_normal: ''
id: color_bttn
on_press: root.open_popup()
Button:
group: 'text'
text: 'Text'
on_press: root.open_text_entry()
<ColorPopup>
size_hint: .5, .5
auto_dismiss: False
title: 'Hello world'
on_open:
r.value = int(r.max * app.SM.get_screen('photo_edit').color[0])
g.value = int(g.max * app.SM.get_screen('photo_edit').color[1])
b.value = int(b.max * app.SM.get_screen('photo_edit').color[2])
AnchorLayout:
anchor_x: 'center'
anchor_y: 'center'
AnchorLayout:
anchor_x: 'center'
anchor_y: 'center'
BoxLayout:
orientation: 'vertical'
Slider:
id: r
on_value:
app.SM.get_screen('photo_edit').color[0] = self.value_normalized
bttn.background_color = app.SM.get_screen('photo_edit').color
bttn.color = [1 - app.SM.get_screen('photo_edit').color[0], 1 - app.SM.get_screen('photo_edit').color[1], 1 - app.SM.get_screen('photo_edit').color[2], 1]
Slider:
id: g
on_value:
app.SM.get_screen('photo_edit').color[1] = self.value_normalized
bttn.background_color = app.SM.get_screen('photo_edit').color
bttn.color = [1 - app.SM.get_screen('photo_edit').color[0], 1 - app.SM.get_screen('photo_edit').color[1], 1 - app.SM.get_screen('photo_edit').color[2], 1]
Slider:
id: b
on_value:
app.SM.get_screen('photo_edit').color[2] = self.value_normalized
bttn.background_color = app.SM.get_screen('photo_edit').color
bttn.color = [1 - app.SM.get_screen('photo_edit').color[0], 1 - app.SM.get_screen('photo_edit').color[1], 1 - app.SM.get_screen('photo_edit').color[2], 1]
Button:
text: 'Close'
id: bttn
background_normal: ''
on_press:
app.SM.get_screen('photo_edit').close_popup()
root.dismiss()
<ImageLabel>
<TextLabel>
size: lbl.size
on_touch_down: if app.SM.get_screen('photo_edit').erase == True: app.SM.get_screen('photo_edit').remove_widget(self)
Label:
id: lbl
#on_size: root.size = self.size
<TextLabelEntry>
size_hint: 0.5,0.5
title: 'Text Entry'
auto_dismiss: True
on_open:
app.SM.get_screen('photo_edit').word = 'Enter Text'
BoxLayout:
size_hint: 0.5,0.2
orientation: 'horizontal'
TextInput:
id: txt
text: 'Enter Text'
on_text: app.SM.get_screen('photo_edit').word = self.text
Button:
on_press:
app.SM.get_screen('photo_edit').close_text_entry()
root.dismiss()
这一直是我的问题了一会儿，也不管我试过，我不能把它修好。任何帮助这样做将不胜感激。
我在视频[这里]（https://www.youtube.com/watch?v=2Gc8iYJQ_qk）中讨论这个问题，也许这可以提供帮助。 – inclement