h.ga...@hotmail.fr
from kivy.uix.gridlayout import GridLayout
from kivy.uix.label import Label
from kivy.uix.scrollview import ScrollView
from kivy.graphics import Color, Rectangle, BorderImage
import page_chat
class ScrollableLabel(ScrollView):
def __init__(self, **kwargs):
try:
super().__init__(**kwargs)
except Exception as e:
print("3 : ", e)
def _update_rect(self, instance, value):
self.rect.pos = instance.pos
self.rect.size = instance.size
# Method called externally to add new message to the chat history
def update_chat_history(self, message):
try:
print("avant un message: ", self.ids.label_history_content.pos)
print("avant un message: ", self.ids.label_history_content.height)
self.ids.label_history_content.text += '\n' + message
print("après un message :", self.ids.label_history_content.height)
self.ids.grid_SL.height = self.ids.label_history_content.texture_size[1] + 15
self.ids.label_history_content.height = self.ids.label_history_content.texture_size[1]
#self.ids.label_history_content.text_size = (self.ids.label_history_content.width, None)
self.scroll_to(self.ids.label_scrolling)
except Exception as e:
print("4 : ", e)
def update_chat_history_layout(self, _=None):
try:
self.ids.grid_SL.height = self.ids.label_history_content.texture_size[1] + 15
self.ids.label_history_content.height = self.ids.label_history_content.texture_size[1] - self.ids.box_text_button.height
#self.ids.label_history_content.text_size = (self.ids.label_history_content.width * 0.98, None)
except Exception as e:
print("5 : ", e)<MainWidget>:
orientation: 'vertical'
height : self.height
id: mainBoxLayout
toolbar: toolbar
tabs: tabs
pos_hint : {"top" : 1}
MDToolbar:
id: toolbar
title: "BiBOT v1"
md_bg_color: 0.5843, 0, 0.2392, 0.8
height: self.parent.height / 20
width: self.parent.width
MDTabs:
id: tabs
on_tab_switch: root.on_tab_switch(*args)
background_color: 0.5843, 0.7529, 0.2392, 0.8
text_color_normal: 0, 0, 0, 1
text_color_active: 0, 0, 0, 1
tab_bar_height : self.parent.height / 20
width: self.parent.width
<Tab>:
BoxLayout:
id: box
orientation: "vertical"
<Tab>:
BoxLayout:
id: box
orientation: "vertical"
<ScrollableLabel>:
size_hint_y: 1
GridLayout:
id: grid_SL
size_hint_y: None
cols: 2
orientation : 'vertical'
MDLabel:
id: label_history_content
size_hint_y : None
valign : "top"
markup : True
color : 0,0,0,1
font_style : 'Caption'
theme_text_color : 'ContrastParentBackground'
MDLabel:
id: label_scrolling
size_hint: None, None
#size: self.texture_size
<ChatPage>:
rows : 2
orientation: "vertical"
pos_hint : {"top" : 1}
id: box_chat_history
ScrollableLabel:
id: history
size_hint_y : 1
pos_hint: {"top": 1}
BoxLayout:
id: box_text_button
cols: 2
size_hint : 1, 0.07
MDTextFieldRect:
id: text_send
hint_text: "Helper text on focus"
helper_text: "Text is always here"
helper_text_mode: "on_focus"
height: self.parent.height
width: self.parent.width
fill_color : 0.1,0,0.1
MDRectangleFlatButton:
id: bouton_send
text: "Send"
text_color: 0, 0, 1, 1
md_bg_color: 1, 1, 0, 1
height: self.parent.height
width: self.parent.width * 0.2Thanks in advance!
Elliot Garbus
You have a class called ScrollableLabel, this class should be derived from a GridLayout, and added to the ScrollView. It should not be a ScrollView.
From: h.ga...@hotmail.fr
Sent: Friday, January 15, 2021 2:44 AM
To: Kivy users support
Subject: [kivy-users] Chat Application - Messages aren't well positionned
Hello everyone,
I am trying to make a chat application using Python (3.7) & Kivy (or KivyMD when it's possible). I'm also trying to take example to the "Kivy-chat-app" Framework (https://github.com/Hash-Studios/Kivy-Chat-App). But it seems I didn't understand everything. When I send a message, it isn't send at the top of the app. Just like this. Why isn't the messages at the very top of the app?
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Elliot Garbus
Here is an example using a boxlayout:
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.boxlayout import BoxLayout
from kivy.properties import StringProperty
kv = """
<InfoLine>:
size_hint_y: None
height: 48
Label:
text: root.label_text
Button:
text: root.button_text
on_release: print(f'Button: {self.text} pressed')
BoxLayout:
orientation: 'vertical'
Label:
text: 'BoxLayout in a ScrollView'
size_hint_y: None
height: 48
ScrollView:
do_scroll_x: False
do_scroll_y: True
scroll_type:['bars', 'content']
bar_width: 20
BoxLayout:
orientation: 'vertical'
id: sv_box
size_hint_y: None
height: self.minimum_height
InfoLine:
InfoLine:
label_text: 'Test'
button_text: 'Initialized in kv'
"""
class InfoLine(BoxLayout):
label_text = StringProperty('default')
button_text = StringProperty('default')
class ScrollBoxApp(App):
def build(self):
return Builder.load_string(kv)
def on_start(self):
for i in range(100):
self.root.ids.sv_box.add_widget(InfoLine(label_text=f'Label {i}', button_text=f'Button {i}'))
ScrollBoxApp().run()
To view this discussion on the web visit https://groups.google.com/d/msgid/kivy-users/600198e6.1c69fb81.6aeb.a147SMTPIN_ADDED_MISSING%40gmr-mx.google.com.