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I have a WinForms application with DataGridView control. My control has five columns (say "Name", "Address", "Phone" etc) I am not happy with default column width. Global CSS settings, fundamental HTML elements styled and enhanced with extensible classes, and an advanced grid system. This RadWindow demo is a lightweight version of the RadWindow and MDI demo, featuring the ability to open ASP.NET PopUp windows, control their appearance and. Microsoft Silverlight library, learning resources, downloads, support, and community. Evaluate and find out how to install and use Silverlight. Building a basic GUI application in Python with Tkinter and wx. Widgets. In this page you will learn to build a basic GUI application in Python step by step. The aim is: Mastering most common GUI techniques (widgets layout, GUI constraints, event binding, etc.)Understanding each and every single method and parameter used here. See two different major GUI toolkit and learn their differences. Serve as a basis for building your own GUI applications. We just import it. Python is not part of the. Python distribution and has to be downloaded and installed. It's best to tell the user that wx. Python is required but. Obout - High performance ASP.NET and ASP.NET MVC controls, including grid, treeview, menu and more for free. DataGridView control is a Windows Forms control that gives you the ability to customize and edit tabular data. It gives you number of properties, methods and events. In this article, we will demonstrate how to create and use a TableLayoutPanel control in a Windows Forms application. Import. Error). STEP 2 : Create a class. It's best to put our application in a class. We will create all our widgets (buttons, text field, etc.) in this method. For the moment, the Tkinter version contains nothing (hence the pass instruction which does nothing.)The wx. Python version contains self. Show(True). to force the window to show up (otherwise it remains hidden) (This is. Tkinter because Tkinter automatically shows. STEP 6 : Creation of main#!/usr/bin/python. Tkinterclass simpleapp. We give it no parent (None), because it's the first GUI element we build. We also give a title to our window (app. In wx. Pyhon, it is mandatory to instanciate a wx. App() object before creating GUI elements. That why we do app=wx. App(). Then we instanciate our class (frame=simpleapp. We also give it no parent (None), because it's the first GUI element we build. We use - 1 to let wx. Python choose an identifier itself. And we give our window a title: 'my application'. STEP 7 : Loop it !#!/usr/bin/python. Tkinterclass simpleapp. Some are more flexible than others. Each container (window, pane, tab, dialog..) can have its own layout manager. I recommend the grid. It's a simple grid where you put your widgets, just. Excel, Open. Office. Calc..). For example: Put a button at column 2, row 1. We indicate where to put it in the grid (column=0, row=0). When a cell grows larger than the widget is contains, you can ask the widget to stick to some edges of the cell. That's the sticky='EW'.(E=east (left), W=West (right), N=North (top), S=South (bottom))We specified 'EW', which means the widget will try to stick to both left and right edges of its cell.(That's one of our goals: Have the text entry expand when the window is resized.)In wx. Python, we call the . Add() method of the layout manager. We pass the widget we just created (self. In our case, the widget does not span over several cells. EXPAND tells the layout manager to expand the text entry if its cell is resized. You can even enter some text. Hey ! We'll see that later. STEP 1. 0 : Adding the button#!/usr/bin/python. Tkinterclass simpleapp. So what's next ? STEP 1. Enable resizing#!/usr/bin/python. Tkinterclass simpleapp. Only the first column (0). Thats Add. Growable. Col() for wx. Python. Thats grid. For example, some column can grow more than other when resized. That's what the weight parameter is for. You have to: create a special Tkinter variable (self. Variable = Tkinter. String. Var())then bind it to the widget (textvariable=self. Variable)then use set() or get() to set or read its value (self. Variable. set(. There are several Tkinter. String. Var, Int. Var, Double. Var, Boolean. Var). With wx. Python, you directly call a method on a widget to read/set its value. This is nice, but not always a desired behaviour. For example, type a loooooooong text in the text field, press ENTER: The window grows. Type a short text again, press ENTER: the window shrinks. You usually do not want your application window grow and shrink automatically all the time. The users will not like that. That's why we fix the size of the window by setting the window size to its own size (self. This way, Tkinter will stop trying to accomodate window size all the time.(And we perform an update() to make sure Tkinter has finished rendering all widgets and evaluating their size.)wx. Python/wx. Widgets does not have this behaviour, so we have nothing special to do. We're done ! We now have our application. But I'm less and less fond of these tools. They tend to generate overkill code, and sometimes even fail to read. Any Visual. Studio. Net user in the audience ? That's pixel coordinates in. With a grid sizer, the user can resize the window to enjoy it full screen. Non blocking GUI ? It may even become a nightmare when. But it's worth the price if you want to create an. For example, my program web. Gobbler. has a thread exclusively dedicated to the GUI, so that it's responsive. Most users expect a modern GUI to be non- blocking. Beware that most GUI toolkit are not thread- safe. You have to use critical sections or other means (message. Python supports threads and has several object to deal with this (Thread- safe queue object, semaphores, critical sections..)Clearely separating the logic of your program from the GUI will greately ease the transition to multi- threaded programming. That's why I recommended separating GUI and program logic in this document. Besides, you will be able to create several different GUIs for your program if you want ! Tkinter or wx. Python ? Tkinter / Tcl/tk . Tkinter is provided in the standard Python distribution. Most Python. users will be able to use your program straight out of the box. No advanced widgets, altough you can use Pmw (Python Megawidgets). Python / wx. Widgets: Uses native operating system widgets when possible (look & feel closer to the operating system's). More advanced widgets (date selector, floating toolbars, shaped windows, treeviews, tooltips, etc.) Not part of the standard Python distribution. Must be downloaded and installed separately. Other GUI toolkit. There are a lot more available GUI toolkits, like GTK (through py. GTK). Qt (through py. Qt), MFC, SWING, Fltk and even wrappers around. Tkinter/wx. Python themselves (Python. Card, etc.)Fore more GUI toolkits, see. Packaging to an EXEIf your application uses Tkinter or wx. Python, is it possible to package. VB. NET Data. Grid. View Tutorial. The following lessons teaches you the fundamental programming concepts of Data. Grid. View control and its supporting classes, in detail. The Data. Grid. View control provides a customizable table for displaying data. This control is designed to be a complete solution for displaying tabular data with Windows Forms. Also the Data. Grid. View class allows us to customization of cells, rows, columns, and borders through the use of its properties You can extend the Data. Grid. View control in a number of ways to build custom behaviors into your applications. The Data. Grid. View control makes it easy to define the basic appearance of cells and the display formatting of cell values. The cell is the fundamental unit of interaction for the Data. Grid. View. All cells derive from the Data. Grid. View. Cell base class. Each cell within the Data. Grid. View control can have its own style, such as text format, background color, foreground color, font etc. All the source code in the following examples ,we chose the Pubs database, which comes with SQL Server , as our target database. |