integrate barcode scanner into asp net web application USING SMILE: THE APPLESCRIPT INTEGRATED PRODUCTION ENVIRONMENT in Objective-C

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CHAPTER 28 USING SMILE: THE APPLESCRIPT INTEGRATED PRODUCTION ENVIRONMENT
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All. Now press Cmd+D, or select User Scripts More Smile Commands Edit Duplicate. (Duplicate is better than copying and pasting, because Duplicate leaves the clipboard untouched.) The duplicated items are created with an offset of 20 pixels to the right and to the bottom. You can move them with the arrows on the keyboard; press the Shift key to have the items move by 20 pixels, and use the left and the bottom arrows to align the new controls with the first ones.
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Figure 28-12. New items are created with increasing indexes. The Duplicate command creates new copies at an offset of (20, 20) with respect to the original. Repeat this step four times (to end up with six copies of each). Still using drag and drop from the Controls palette, create (for instance, both at the same height, under the array of text fields) two new buttons. Now you can resize the dialog box so as to enclose the controls only. When you write the script for the dialog box, you ll refer to the controls by their indexes. A control s index is the number that its frame displays in the bottom-right corner when selected. Check that the indexes are in the natural order, that is, from left to right and then from top to bottom. The rightmost button in the bottom should assume the index 14. If you have more items, use Edit Clear to suppress the extra controls. If the order is not what it should be, proceed as follows. Unselect any item by clicking an empty spot. Then press the Shift key, and click each item once in the desired order so as to finally select them all. Now, select Edit Cut and then Edit Paste; the controls will be pasted in the same order as you selected them. The script will handle the contents of the editable text boxes, but you have to name the other eight controls. For the editable text boxes, I suggest string to display:, text font:, text size:, x (pixels):, y (pixels):, and current target:; for the buttons I suggest refresh and validate (see Figure 28-13). For each of the eight controls to be renamed successively, double-click each to open its Control dialog box, set its name to the desired string, and then close the Control dialog box. You will not need another new control for the moment, so close the Controls palette. The interface of the dialog box is now operational if not fully finalized from a cosmetic point of view. I won t demonstrate cosmetic-oriented features here. It may be enough to say that in addition to moving and resizing, you can, using the Dialog Align Items menu item, copy the sizes from a control to another and align and/or distribute the controls vertically or horizontally. More sophisticated, user-contributed editing tools are available for free at Satimage s website.
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CHAPTER 28 USING SMILE: THE APPLESCRIPT INTEGRATED PRODUCTION ENVIRONMENT
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Figure 28-13. When a dialog box is in edit mode, the bottom-right corner shows a grow box, which resizes the dialog box. Here no grow box is visible.
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Programming the Dialog Box
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Last but not least, you have to program the dialog box by providing it with scripts. All the lines you wrote for the first tests are still available, so your task will have much to do with copying and pasting. In Smile, when the user acts on a control (for instance, typing a character in an editable text box or clicking a button), Smile notifies the script of the control s container the dialog box; the control itself is not notified. More precisely, the script of the dialog box will receive the following event: click in d item number n where d is a reference to the dialog box (the owner of the script) and n is the index of the control that the user s action addresses. Thus, you won t write as many click in handlers as you have active controls you need only one. The other handler you need to write is prepare. When a custom dialog box opens, Smile sends the following event to its script just before making it visible: prepare d where d is a reference to the dialog box. Any initialization should be performed in the prepare handler. Most often, the job of the prepare handler is to prepare the appearance of the dialog box and to assign initial values to the global variables that the script of the dialog box may use. However, at this step you won t use global variables (properties); the prepare handler will mainly reset the entry text fields. Let s write the prepare handler. With the dialog box still in edit mode, select Dialog Edit Dialog Script: this will open the script of the dialog box. (Alternatively, press Cmd+Opt-click in an empty spot of the dialog box.) The name of the new (colored) window is the same as the dialog box s name, with .Script appended. It may be helpful to note here that the script of the dialog box is different from, say, the script of an applet, in that it will never run ; the script will receive events that it will handle in the handlers you ll write, but under normal conditions it will never receive a run event.
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