widget | 易学教程

Orange脚本调用Data Mining Library

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3 月，跳不动了？>>> 原文（英）： http://docs.orange.biolab.si/3/data-mining-library/ Orange Data Mining Library 教程这是一个有好的关于 Orange 脚本使用的教程, 而Orange是一个基于Python 3的数据挖掘支持库。假定你已经下载和安装了 Orange，可以从 github repository 获得的版本，并且有一个可以正常运行的Python环境，注意需要python3，python3.4将是目前推荐的版本。使用Python shell，输入下面的代码： % python >>> import Orange >>> Orange.version.version '3.2.dev0+8907f35' >>> 如果没有错误和警告信息，Orange 和 Python 就已经正确安装，可以继续下面的教程。 The Data Data Input Saving the Data Exploration of the Data Domain Data Instances Orange Data Sets and NumPy Meta Attributes Missing Values Data Selection and Sampling Classification Learners and

How can i show Album images Like Facebook post like this?

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问题 I'm getting single images nor multiple images link from the API link according to the user uploads. So I want to create a Responsible widget. Which want to change according to the API data. If I get more than 4 images, I want to show the count like this. I mean over the images. please see the image mark below 回答1: You should probably create a widget to handle all that. Here is a small example. This widget takes image Urls and puts them in a grid and when the number of images exceeds maxImages

how to make a graph fill all the window

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问题 I am ploting a graph in an application created with QtDesigner, the problem is that, when the grapth is showed, a big "grey edge" appears between the graph space and the mplwidget space. That makes the plot smaller, so how could I delete this big "grey border" that appears when I show my graph in the main Window?? I would like my graph to fill all the available space for the widget. 回答1: The short answer is: "Use fig.tight_layout() ." Let me give a bit more explanation about what's going on,

How to override a widget in a child theme in WordPress?

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问题 I want to make a simple modification in a PHP file located here in my parent theme: wp-content\themes\sailing\inc\widgets\gallery\tpl\base.php So I created the same folder structure in my child theme and did the modification I need in this file. I also copied/pasted all the PHP files needed to declare this widget. wp-content\themes\sailing\inc\widgets\widgets.php wp-content\themes\sailing\inc\widgets\gallery\gallery.php wp-content\themes\sailing-child\inc\widgets\widgets.php wp-content\themes

Is it possible to build android widgets in flutter?

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问题 The fact that Flutter heavily uses the word widget makes it difficult to find documentation on this topic. On Android (I believe this isn't possible on iOS), we can add widgets on our home dashboard, allowing us to see app-related information or to trigger one-click actions without needing to open the app in question. Is it possible to build such "widgets" in Dart & Flutter? Or should I do that in java and somehow plug it with my flutter app? Can you share an example of a resource containing

How to achieve automatic width of Button in Android layout

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问题 I have a few Button listed vertically and I need all of them to have the same width, but also to display all text inside. Basically I need width for all of them as a wrapped width of the largest one. Hope I explained it well. Now... I already have one layout that is working on my Samsung Galaxy S2 (4.1.2), but on friend's phone - Samsung GT-N7100 (note2) and android 4.4.2 - it is not working - some text is not displayed in the Button. This is my layout: <RelativeLayout xmlns:android="http:/

Difference Between Deactivate and Dispose?

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问题 In Flutter, StatefulWidget has dispose() and deactivate() . How are they different? 回答1: dispose is definitive. deactivate is not. deactivate is called when a widget may be disposed. But that is not guaranteed. A typical situation where deactivate is called but not dispose ,is when moving widgets in the widget tree using a GlobalKey . 来源： https://stackoverflow.com/questions/56387243/difference-between-deactivate-and-dispose

Flutter: best practices for persisting same widget while navigating to different screens/routes

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问题 For the app we are making, it is required that a widget should remain active and visible while the user navigates to different screens; specifically, we need a music player widget that keeps playing music (while showing its live controls) while the user navigates to different routes, as shown in the diagram below (in the link). Flutter widget persisting during navigation Searching around, we found some hints on how to tackle this very basic use case (some suggest using the Material App's

Set widget to TreeItem on gwt

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问题 I have to implements a tree on gwt. I'm implementing an object that extends Widget to set it on a TreeItem. The problem is that if I set on a TreeItem this object (that have only Strings and Integers fields) I can't see anymore the tree. Where is the problem? I can't see it. private Tree frontEndTree; private void buildTree(HashMap<Long, Categoria> categoriaMap) { for(Categoria categoria : categoriaMap.values()) { if(categoria.getLevel() != 1) continue; TreeItem firstLevel = //this

Mozilla “Jetpack” Add-On: Anchor Panel to Widget

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问题 I'm making a Jetpack extension in which a widget opens a panel. Clicking the widget opens the panel as expected (anchored in the lower-right corner to the widget). But if I call widget.panel.show() from my code, the panel opens detached from the widget, centered in the screen, floating in space. In short, how can I fix this? Can I simulate a click event on the widget (somehow) instead of calling widget.panel.show()? Can I force the panel to anchor to the widget? This question has a solution