user-interface

问题 In code I have developed some years ago I have been using this a lot to close the current form on pressing the Escape key at any moment: procedure TSomeForm.FormKeyPress(Sender: TObject; var Key: Char); begin if key = #27 then close; end; This behaviour is defined for the TForm. The form's KeyPreview property is be set to True to let the form react to key presses before any other components. It all works perfectly well for the best part of the program, however, when the Escape key is pressed

问题 In code I have developed some years ago I have been using this a lot to close the current form on pressing the Escape key at any moment: procedure TSomeForm.FormKeyPress(Sender: TObject; var Key: Char); begin if key = #27 then close; end; This behaviour is defined for the TForm. The form's KeyPreview property is be set to True to let the form react to key presses before any other components. It all works perfectly well for the best part of the program, however, when the Escape key is pressed

问题 I am using ScalaFX and trying to learn how it works. As an exerpiment (not what I will do in production) I want a method that gets the title of a window. So here is my Graph.scala file: package graphing import scalafx.application.JFXApp import scalafx.scene.Scene import scalafx.scene.paint.Color class Graph { val app = new JFXApp { stage = new JFXApp.PrimaryStage { title = "First GUI" scene = new Scene { fill = Color.Coral } } } def getTitle() = { app.stage.getTitle } def generateChart(args:

问题 How precise is the timestamp property of the UITouch class in iOS? Milliseconds? Tens of milliseconds? I'm comparing an iPad's internal measurements with a custom touch detection circuit taped on the screen, and there is quite a bit of variability between the two (standard deviation ~ 15ms). I've seen it suggested that the timestamp is discretized according to the frame refresh interval, but the distribution I'm getting looks continuous. 回答1: Prior to the iPad Air 2, the touch detection

问题 How precise is the timestamp property of the UITouch class in iOS? Milliseconds? Tens of milliseconds? I'm comparing an iPad's internal measurements with a custom touch detection circuit taped on the screen, and there is quite a bit of variability between the two (standard deviation ~ 15ms). I've seen it suggested that the timestamp is discretized according to the frame refresh interval, but the distribution I'm getting looks continuous. 回答1: Prior to the iPad Air 2, the touch detection

问题 I'm a new Android developer, and I'm just trying to improve my skill by reading some samples, I want to design a new interface using GridLayout, I've checked a lot of samples but I can't seem to draw borders between the GridLayout cells. What could I be missing? Here is a link that I went through it, but the borders didn't show up! http://developer.samsung.com/android/technical-docs/GridLayout-in-Android# I appreciate your care in advance. 回答1: Android Layout containers don't draw borders.

问题 I'm a new Android developer, and I'm just trying to improve my skill by reading some samples, I want to design a new interface using GridLayout, I've checked a lot of samples but I can't seem to draw borders between the GridLayout cells. What could I be missing? Here is a link that I went through it, but the borders didn't show up! http://developer.samsung.com/android/technical-docs/GridLayout-in-Android# I appreciate your care in advance. 回答1: Android Layout containers don't draw borders.

问题 I'm a new Android developer, and I'm just trying to improve my skill by reading some samples, I want to design a new interface using GridLayout, I've checked a lot of samples but I can't seem to draw borders between the GridLayout cells. What could I be missing? Here is a link that I went through it, but the borders didn't show up! http://developer.samsung.com/android/technical-docs/GridLayout-in-Android# I appreciate your care in advance. 回答1: Android Layout containers don't draw borders.

问题 I'm a new Android developer, and I'm just trying to improve my skill by reading some samples, I want to design a new interface using GridLayout, I've checked a lot of samples but I can't seem to draw borders between the GridLayout cells. What could I be missing? Here is a link that I went through it, but the borders didn't show up! http://developer.samsung.com/android/technical-docs/GridLayout-in-Android# I appreciate your care in advance. 回答1: Android Layout containers don't draw borders.

问题 I'm using DataTable in my recent app and i need to change the color of the row line or make it invisible (i mean I don't want to my table shows any row line) If anyone knows please help! thanks 回答1: Use Theme widget and overriding the dividerColor as shown below. import 'package:flutter/material.dart'; void main() => runApp(MyApp()); class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( home: MyHomePage(), ); } } class MyHomePage extends