user-interface

问题 I'd like to know how to center the contents a Text widget vertically and horizontally in Flutter. I only know how to center the widget itself using Center(child: Text("test")) but not the content itself, it's by default left aligned. In Android, I believe the property of a TextView that achieves this is called gravity . Example of what I want: 回答1: Text alignment center property setting only horizontal alignment. I used below code to set text vertically and horizontally center. Code: child:

问题 I'm trying to create a dynamic UI, so i used this code output$col <- renderUI({ map(col_names(), ~ textInput(.x, NULL, value = isolate(input[[.x]])) %||% "") }) from : https://mastering-shiny.org/action-dynamic.html#multiple-controls My question is basically, what is meaning of the syntax %||% ? 回答1: The help page of sheds light into it: ?rlang::`%||%` Description This infix function makes it easy to replace NULLs with a default value. It's inspired by the way that Ruby's or operation (||)

问题 I am new to pyside and I am following a tutorial at http://zetcode.com/gui/pysidetutorial/widgets2/. I am trying to get an image to show in a window. It seems that I should be able to pass in a file location for a picture on my computer, but no matter what I do I can't seem to get it to display the file I pass in. Any help would be greatly appreciated. Thanks! import sys from PySide import QtGui, QtCore class Example(QtGui.QWidget): def __init__(self): super(Example, self).__init__() self

问题 I am new to pyside and I am following a tutorial at http://zetcode.com/gui/pysidetutorial/widgets2/. I am trying to get an image to show in a window. It seems that I should be able to pass in a file location for a picture on my computer, but no matter what I do I can't seem to get it to display the file I pass in. Any help would be greatly appreciated. Thanks! import sys from PySide import QtGui, QtCore class Example(QtGui.QWidget): def __init__(self): super(Example, self).__init__() self

问题 I need to use jquery ui dialog in order to open a dialog and let users open it anytime they want. I used the following code but the point is that the dialog can open just once. I cannot open it a second time. What's wrong with the code? $j(document).on("click", "p.span", function () { $j('<div></div>').dialog({ modal: true, closeText: 'Close', title: "Title", open: function () { var markup = '<p>Text block</p>'; $j(this).html(markup); $j(document).unbind('click'); return false; } }); }); 回答1:

问题 i want to display the output of opencv in this label. but in this i want to start recording with the click of a start button and stop with stop button and if possible i want to lauch my webcam (previously coded) with the click of start webcam button simentenusly. import datetime import tkinter as tk from tkinter import ttk from PIL import Image, ImageTk, ImageGrab import cv2 import numpy as np import threading import win32api from tkinter.filedialog import asksaveasfilename VIDEO_SIZE = (960,

问题 I have some problems with my tabbed view when I set isTranslucent to false in combination with a NavigationView . Does anyone know how to fix this? The problem is shown in the attached image. I need translucent set to false otherwise I can't get the dark color. 回答1: You can set backgroundColor. Don't set isTranslucent to false or it will create these artefacts you mentioned. UITabBar.appearance().backgroundColor = .black UINavigationBar.appearance().backgroundColor = .black It becomes much

问题 I have some problems with my tabbed view when I set isTranslucent to false in combination with a NavigationView . Does anyone know how to fix this? The problem is shown in the attached image. I need translucent set to false otherwise I can't get the dark color. 回答1: You can set backgroundColor. Don't set isTranslucent to false or it will create these artefacts you mentioned. UITabBar.appearance().backgroundColor = .black UINavigationBar.appearance().backgroundColor = .black It becomes much

问题 I use Netbeans 7 on Kubuntu 12.04. I start Netbeans like this: netbeans --cp:a /usr/share/java/xercesImpl.jar & cause of known issue with Netbeans and Kubuntu 12.04. In the middle of my project my palette with Swing components just .. disappeared! I see only sth like this: How to restore default Netbeans palette? I checked Ctrl+Shift+8 shortcut but with no results - the problem is still the same. **EDIT: I dont know what I did but now I see ONLY EMPTY palette :( : ** I also tried this: 1) I

问题 I use Netbeans 7 on Kubuntu 12.04. I start Netbeans like this: netbeans --cp:a /usr/share/java/xercesImpl.jar & cause of known issue with Netbeans and Kubuntu 12.04. In the middle of my project my palette with Swing components just .. disappeared! I see only sth like this: How to restore default Netbeans palette? I checked Ctrl+Shift+8 shortcut but with no results - the problem is still the same. **EDIT: I dont know what I did but now I see ONLY EMPTY palette :( : ** I also tried this: 1) I