.NET/Java PDF, Tiff, Barcode SDK Library

By selecting the checkbox on the left, the checkbox on the right will change its value, and it will be the opposite value of the left one. In addition, the text box on the right will change its text to reflect the value of the left checkbox. Coolest of all, you can type in the text box, and if you change false to true, or vice versa, the checkboxes will update accordingly. So, if you type true, the left checkbox will be selected, and the right one will be cleared. How does this work Well, let s first look at the Atlas Script that implements it.

barcode generator excel 2010 free, excel 2007 barcode add in, microsoft office excel barcode font, barcode font excel free, barcode font for excel, random barcode generator excel, free barcode generator for excel 2013, how to add barcode font in excel 2010, excel barcodes, barcode fonts for excel 2010,

The last step is to build the project from the generated Makefile. How to do this depends on which platform and compiler you are using. You should usually type make and press Enter, but gmake (common on Berkeley Software Distribution [BSD] systems) and nmake (on Microsoft compilers) are other common alternatives. Try looking in your compiler manual if you cannot get it to work at the first try.

Again, we get the expected output:

45.65

OK, what if we have some decimals in something like an accounting ledger, and we want to format them all to line up properly, with a preceding dollar sign

When running Windows, applications do not get a console output by default. This means that WinTip dows applications cannot, by default, write output to the command-line users. To see any output from qDebug(), you must add a line reading CONFIG += console to the project file. If you built the executable and then saw this tip, try fixing the project file; then run make clean followed by make. This process ensures that the project is completely rebuilt and that the new configuration is taken into account.

Well, there s an overload of ToString on each of the numeric types that takes an additional parameter a format string.

In most instances, we re not dreaming up a brand-new format for our numeric strings; if we were, people probably wouldn t understand what we meant. Consequently, the framework provides us with a whole bunch of standard numeric format strings, for everyday use. Let s have a look at them in action.

Example 10-7 shows how we format a decimal as a currency value, using an overload of the standard ToString method.

The only thing left to do now is to run the application and watch this message: Hello Qt World!. The executable will have the same name as the directory that you used. For Windows users, the executable ends up in the release directory with the exe file name extension, so you start it by running the following command: release\testing.exe

decimal dollarAmount = 123165.4539M; string text = dollarAmount.ToString("C"); Console.WriteLine(text);

The following is the complete Atlas Script for this page (you can see the whole page, including the HTML markup, in the download for this chapter): <script type="text/xml-script"> <page xmlns:script="http://schemas.microsoft.com/xml-script/2005"> <components> <textBox targetElement="textBox">

The capital C indicates that we want the decimal formatted as if it were a currency value; and here s the output:

$123,165.45

Notice how it has rounded to two decimal places (rounding down in this case), added a comma to group the digits, and inserted a dollar sign for us.

enable you to create and modify the Qt building blocks and create custom components for your own applications.

Actually, I ve lied to you a bit. On my machine the output looked like this:

123,165.45

That s because it is configured for UK English, not U.S. English, and my default currency symbol is the one for pounds sterling. We ll talk about formatting and globalization a little later in this chapter.

odels and views are design patterns that frequently occur in software of all types. By separating the data into a model and rendering that model to the users through views, a robust and reusable design is created. Models are used to describe the structures shown in Figure 5-1: lists, tables, and trees. A list is a one-dimensional vector of data. A table is a list, but with multiple columns a twodimensional data structure. A tree is simply a table, but with yet another dimension because data might be hidden inside other data. When you think about how to build applications, you will find that these structures can be used in almost all cases so you can build a model the represents your data structure in a good way. It is also important to remember that you need not change the way in which you actually store your data you can provide a model class that represents your data and then maps each item in the modeled data to an actual item in your application s data structures. All these structures can be shown in many different ways. For example, a list can be shown as a list (which shows all items at once) or as a combo box (which shows only the current item). Each value can also be shown in different ways for example, as text, values, or even images. This is where the view enters the picture its task is to show the data from the model to the user.

That s the simplest form of this currency format. We can also add a number after the C to indicate the number of decimal places we want to use, as Example 10-8 shows.