redraw

问题 I have a userform in VBA and I'd like to redraw/update it in the middle of a method. When the method is called on button click, the function is as below: UsrForm.Field1.Value = "" UsrForm.Field2.Value = "" UsrForm.Label1.Caption = "LOADING..." /*Processing occurs*/ UsrForm.Field1.Value = val1 UsrForm.Field2.Value = val2 UsrForm.Label1.Caption = "DONE" However, the update to the form visible only occurs when the method is completed. I get val1, val2, and "DONE" but not the "LOADING..." message

问题 This is the html code <highcharts-chart *ngIf="!isLoading" [Highcharts]="Highcharts" [options]="chartOptions" [(update)]="updateChart" style="width: 100%; height: 100%; display: block;" ></highcharts-chart> enter code here This is the typescriptcode onTogglevolume() { this.chartOptions.series[2].visible = !this.chartOptions.series[2].visible; this.chartOptions = { ...this.chartOptions }; this.chartOptions.redraw(); } These are import statements import * as Highcharts from 'highcharts'; import

问题 TL;DR : Applying visual effects to the contents of a ScrollView causes thousands of requests for the same (unchanging) image for each drag gesture. Can I reduce this? (In my real app, I have 50-odd images in the view, and the scrolling is correspondingly sluggish.) Gist To give a little life to a scrolling HStack of images, I applied a few transforms for a circular "carousel" effect. (Tips of the hat to sample code from John M. and Paul Hudson) The code is copy-paste-runnable as given. (You

问题 TL;DR : Applying visual effects to the contents of a ScrollView causes thousands of requests for the same (unchanging) image for each drag gesture. Can I reduce this? (In my real app, I have 50-odd images in the view, and the scrolling is correspondingly sluggish.) Gist To give a little life to a scrolling HStack of images, I applied a few transforms for a circular "carousel" effect. (Tips of the hat to sample code from John M. and Paul Hudson) The code is copy-paste-runnable as given. (You

问题 In my current application I am using invalidate(Rect) to update a portion of my current view but as of API 28 this method is deprecated. So my questions are: 1.Are there any other way to update only a portion of view? 2.What are the consequences of using a deprecated method? 回答1: According to the android documentation, just call the invalidate() method as the redrawing area is calculated internally. From view docs This method was deprecated in API level 28. The switch to hardware accelerated

问题 I am investigating the use of LiveChart within a WPF application for the purpose of plotting in real time, temperature measurements. I have put together a simple line chart example to read data at 10Hz, and redraw for every sample. However, I am finding that the redraw rate is around 1Hz. This seems very slow for a WPF Live charting tool. My xaml is as follows : <lvc:CartesianChart x:Name="TemperatureChart" Grid.Row="1" LegendLocation="Right" Hoverable="False" DataTooltip="{x:Null}"> <lvc

问题 I use dart FFI to retrieve data from native side, and show the data with flutter CustomPaint . I use ValueNotifier to control CustomPaint repaint. Code: Poll data at a rate With a state class, I poll data from native side periodically, and assign it to the ValueNotifier . class _ColorViewState extends State<ColorView> { ValueNotifier<NativeColor> _notifier; Timer _pollTimer; @override void initState() { // TODO: implement initState super.initState(); ffiInit(); // initialize notifier

问题 I use dart FFI to retrieve data from native side, and show the data with flutter CustomPaint . I use ValueNotifier to control CustomPaint repaint. Code: Poll data at a rate With a state class, I poll data from native side periodically, and assign it to the ValueNotifier . class _ColorViewState extends State<ColorView> { ValueNotifier<NativeColor> _notifier; Timer _pollTimer; @override void initState() { // TODO: implement initState super.initState(); ffiInit(); // initialize notifier

问题 BufferedReader hl = new BufferedReader(new InputStreamReader(getResources().openRawResource(R.raw.lines))); while(hl.ready()){ showLines.append(hl.readLine()+"\n"); showLines.invalidate(); Thread.sleep(10); } That is my code but it is not redrawing when I tell it to. It is supposed to redraw after every line that is added to textview, but it still only redraws at the end? Can someone please help me, I can't figure it out. 回答1: That is bacause your invalidate() is in a thread while loop and is

问题 I have been trying to get this code to work for weeks and cannot figure out the issue. I have a list of images, that I am using to animate my character. THe game worked fine at first, but ever since I made the background animate (start moving left to right), my character stopped appearing. Do I have to change the location of some of my code? Really confused. Thank you!! # create lists with images of character walking left and right rightDirection = [pygame.image.load('R1.png'), pygame.image