Because its not a visible control, it will be added to the Shelf.
Zmodeler 3 Tutorial Upgrade To AWe recommend you upgrade to a newer version of Internet Explorer or switch to a browser like Firefox or Chrome.This Tutorial will walk you through creating an application in Xojo that can communicate with a serial device.
If you havent gone through the Xojo Desktop QuickStart and Tutorial yet, you should do so first. For this tutorial, the serial device must be an RS-232 device. There are some devices that combine these two so you dont need the adapter. What is important is that the device makes it clear that its a serial device. Zmodeler 3 Tutorial Code Scanner IsThis particular barcode scanner is popular and available from Amazon for about 100 new or less than 40 used. You scan a barcode and they convert that to a value then inserts the value into the keyboard buffer as if the user typed it. Thats fine for some purposes but it means the user must have the cursor in the field where they want the barcode value to appear. You may not want to depend on that or you may be using a device that doesnt pretend to be something else and you must communicate with it directly. If you know the name the device uses, you can loop through all of the serial devices and look for the index that has the matching name. ![]() When you plug in your device, youll want it to appear in this menu and disappear when you unplug it. Zmodeler 3 Tutorial Update The DevicesPopupMenuTo do that, you will need a Timer control that will periodically update the DevicesPopupMenu control. Count count Then The number of serial devices has changed so update the menu DevicesPopupMenu. SelectedRowIndex 0 Else one has been added so select the new device DevicesPopupMenu. It then compares that to the number of connected serial devices and if they are not the same, it knows that either a new device has been connected or an existing device has been disconnected. In either case, it removes all the rows from the popup menu then loops through the connected serial devices, adding the name of each device connected to the popup menu. ![]() If thats the case, a device was removed so the code selects the first row (row 0) from the list of serial devices. ![]() On MacOS with no new devices plugged in, the popup menu may list a few internal system devices. If you happen to be running Windows on MacOS via VMWare or Parallels, you may have an item titled COM1 in the popup menu. Depending on the OS, you will get different device names when you plug in this barcode scanner.
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