undo

I am trying to get Undo/Redo keyboard shortcuts working in my WPF application (I have my own custom functionality implemented using the Command Pattern ). It seems, however, that the TextBox control is intercepting my "Undo" RoutedUICommand. What is the simplest way to disable this so that I can catch Ctrl+Z at the root of my UI tree? I would like to avoid putting a ton of code/XAML into each TextBox in my application if possible. The following briefly demonstrates the problem: <Window x:Class="InputBindingSample.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: For some reason, my migrations appear to have been jumbled/corrupted/whatever. I'm at the point where I just want to start over, so is there a way to completely undo all migrations, erase the history, and delete the migration code, so I'm back to square one? e.g.) PM> Disable-Migrations or Rollback-Migrations I don't want to "update" to an original migration step (i.e. something like an InitialSchema target) because I can't find it anymore. 回答1: You can rollback to any migration by using: Update-Database -TargetMigration:"MigrationName" If

本文转载于: 猿2048 网站☞ https://www.mk2048.com/blog/blog.php?id=ia1bkkaiib 最近在做网页版图片处理相关的项目，也算是初入了 canvas 的坑。项目需求中有一个给图片添加水印的功能。我们知道，在浏览器端实现图片添加水印功能，通常的做法就是使用 canvas 的 drawImage 方法。对于普通的合成（比如一张底图和一张 PNG 水印图片合成）来说，其大致实现原理如下： var canvas = document.getElementById("canvas"); var ctx = canvas.getContext('2d'); // img: 底图 // watermarkImg: 水印图片 // x, y 是画布上放置 img 的坐标 ctx.drawImage(img, x, y); ctx.drawImage(watermarkImg, x, y); 直接连续使用 drawImage() 把对应的图片绘制到 canvas 画布上就行。 以上就是背景介绍。但是略麻烦的是添加水印的需求中还有一个需要实现的功能是用户能够切换水印的位置。我们自然会想到能否实现 canvas 的 undo 功能，当用户切换水印位置时，先撤销上一步 drawImage 操作，然后再重新绘制水印图片位置。 restore / save ?

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have a QPlainTextEdit and I'm building a progress dialog for it when opening large files. Rather than using setText, I want to add one line of text at a time by using QTextCursor.insertText. The problem is that when I do it this way, I can undo each line that was added... is there a way to clear the undo history? 回答1: Use QTextDocument::clearUndoRedoStacks . Code: editor->document()->clearUndoRedoStacks(); // default clears both See docs if you want to clear just undo. Also, it's good idea to read docs of QTextDocument (and QTextCursor)

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have a folder on my machine, but I had deliberly kept out of sync with the main project (I should have branched, but didn't) I have now gone and updated this folder to the latest version, forgetting that I shouldn't do that. Is it possible to undo this update, and go back to the state I was in before the update? Or, (as I closed the update window), can I see what files were updated/added? Thanks 回答1: Use " Update to Revision " and enter the revision your working copy was at before the update. If you don't know the exact revision, you can

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I've searched almost all preferences dialog on IntelliJ Idea and haven't found how to undo 'don't ask again action' on the update dialog 回答1: You'll find what you need in the run/debug configuration : Show dialog: Select this check box if you want to see the Update dialog every time you perform the Update application action. 文章来源: IntelliJ Idea undo 'don't ask again action'

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: In an attempt to codesign gdb, I used an incorrect certificate, so now gdb is codesigned but does not work as expected. I attempted to codesign gdb using the correct certificate, however codesign complains that gdb is already signed. So how to undo it? The codesign command I used was: codesign -s gdb-cert gdb 回答1: It's not well documented at all, from what I can tell, but you may be able to remove code signing via: codesign --remove-signature gdb 回答2: I had a problem with removing signature as suggested by Micheal: unsupported type or

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have just executed the ng eject command. But now I need to revert it, and continue to use ng commands. Is it possible? I would be grateful for any help. 回答1: At https://github.com/angular/angular-cli/blob/master/packages/%40angular/cli/tasks/build.ts#L27 (current angular CLI version: 1.0.1) there is a condition: if (config.project && config.project.ejected) { throw new SilentError('An ejected project cannot use the build command anymore.'); } when you run ng-eject , package.json file is modified with new npm scripts, webpack.config.js file

I am using a customized version of FingerPaint for Android with some other features, like inserting images and moving them. I decided to implement an Undo&Redo, since it will make life just easier. In order to implement it, I finally decided to use a Stack where I push the Drawing Cache of the view, and from where I push the content every time I want to go back to a previous state. So, using the FingerPaint as a basis, I have the following: private void touch_up() { mPath.lineTo(mX, mY); // commit the path to our offscreen mCanvas.drawPath(mPath, mPaint); // I enable the set drawing cache...