barcode generator source code in vb.net Creating Shapes in Java

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Creating Shapes
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Figure 4-1 Context menu
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from within the curly braces of an element, it will show you all the available attributes for that element You should commit the CRTL-SPACEBAR keystroke shortcut to memory because you will find yourself using it quite often If you press the ENTER key while the context menu is on an attribute, as shown in Figure 4-1, that attributes will be inserted the into your script Notice that in your context menu, one of the attributes you can add is startX The startX attribute is one of the four attributes you need to specify to draw the line Make sure the startX attribute is highlighted and press the ENTER key The context menu should have inserted in startX attribute and a colon (:), as shown in Figure 4-2 Assign the startX attribute a value of 10 Keep in mind that all the attributes for an element are separated by a comma, semicolon, or nothing The fact is that JavaFX is very forgiving when it comes to attribute delimiters With that said, try to stick with using a semicolon, just to be standardized Therefore, insert a semicolon after the startX value
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JavaFX: A Beginner s Guide
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Figure 4-2 Adding an attribute with the context menu
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and bring up the context menu again Use the context menu to insert startY and assign it a value of 10 as well You will be drawing a line that extends from x10, y10 to x150, y150 Seeing as you have just assigned 10,10 to startX and startY, use the context menu to finish assigning the correct values to endX and endY Your finished script should look like this:
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package comjfdimarziojavafxforbeginners; import javafxstageStage; import javafxsceneScene; import javafxsceneshapeLine; /** * @author JFDiMarzio */ Stage { title : "Basic Shapes" scene: Scene { width: 200 height: 200
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content: [ Line {startX : 10; startY : 10; endX : 150; endY : 150; } ] } }
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Run your script, and you should get a line that looks like the one shown in Figure 4-3 This looks like a great line, and you should be very proud of the job you have done but all things considered, it is not very exciting You can assign a few more attributes to this line to make it a little more interesting The discussion that follows details all the attributes available to the Line element To begin, to make your line a little thicker, add an attribute to your Line element called strokeWidth The strokeWidth attribute does exactly what the name implies it governs the thickness or width of the Line element Assign the strokeWidth attribute a value of 15 This will make your line stand out a bit more Adding some color to your line will make it pop out even more Color is a common attribute for shapes To work with color, you need to import the javafxscenepaintColor package Therefore, add the following import statement to your script:
import javafxscenepaintColor;
To color the Line element a nice shade of tomato red, create a stroke attribute and assign it a value of ColorTOMATO The stroke attribute acts just like the stroke of a paint brush It can contain information about color, gradients, and other visually appealing details of a shape Here s the code for the stroke attribute:
stroke : ColorTOMATO
Figure 4-3 A line
JavaFX: A Beginner s Guide
Your new Line element should have the following attributes and values:
Line {startX : 10; startY : 10; endX : 150; endY : 150; strokeWidth: 15; stroke: ColorTOMATO }
Run your script, and you will see a nice red line from the upper left to the lower right of the screen Let s draw three of these lines to form the shape of the letter U Try to lay out the three lines on your own The first line should run down the left side of the screen The second line should run from end of the first line, across the bottom, to the right side of the screen Finally, the third line should run from the end of the bottom line to the top on the right side of the screen When you are finished, compare your code to the code that follows:
package comjfdimarziojavafxforbeginners; import javafxstageStage; import javafxsceneScene; import javafxsceneshapeLine; import javafxscenepaintColor; /** * @author JFDiMarzio */ Stage { title : "Basic Shapes" scene: Scene { width: 200 height: 200 content: [Line { startX : 10; startY : 10; endX : 10; endY : 100; strokeWidth : 15 stroke: ColorTOMATO; } Line { startX : 10; startY : 100; endX : 100; endY : 100;
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