USB Barcode Scanner in python: Text Field Focus
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I am trying to read from USB barcode scanner into my application. I can read the barcode into the application since it is an input from a keyboard.
My question is, let's say I have two text fields, how can I set the focus transition from the first field into the second field once the input is scanned into the first field?
Thanks....
python tkinter barcode barcode-scanner
asked Nov 13 '18 at 22:34
lino.lkalino.lka
11
add a comment |
I am trying to read from USB barcode scanner into my application. I can read the barcode into the application since it is an input from a keyboard.
My question is, let's say I have two text fields, how can I set the focus transition from the first field into the second field once the input is scanned into the first field?
Thanks....
python tkinter barcode barcode-scanner
asked Nov 13 '18 at 22:34
lino.lkalino.lka
11
add a comment |
I am trying to read from USB barcode scanner into my application. I can read the barcode into the application since it is an input from a keyboard.
My question is, let's say I have two text fields, how can I set the focus transition from the first field into the second field once the input is scanned into the first field?
Thanks....
python tkinter barcode barcode-scanner
asked Nov 13 '18 at 22:34
lino.lkalino.lka
11
I am trying to read from USB barcode scanner into my application. I can read the barcode into the application since it is an input from a keyboard.
My question is, let's say I have two text fields, how can I set the focus transition from the first field into the second field once the input is scanned into the first field?
Thanks....
python tkinter barcode barcode-scanner
python tkinter barcode barcode-scanner
asked Nov 13 '18 at 22:34
lino.lkalino.lka
11
asked Nov 13 '18 at 22:34
lino.lkalino.lka
11
asked Nov 13 '18 at 22:34
lino.lkalino.lka
11
asked Nov 13 '18 at 22:34
lino.lkalino.lka
11
asked Nov 13 '18 at 22:34
lino.lkalino.lka
11
11
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
you can check to see if the first entry is empty and then switch focus to the second one
if len(the_first_entry_widget.get()) != 0:
the_second_entry_widget.focus()
answered Nov 13 '18 at 22:39
vencaslacvencaslac
1,183420
add a comment |
Most scanners can add suffix code to the scanned barcode data for notification.
The most commonly used is the Enter(Carriage Return) key, but the Tab key may also be used.
You can do as follows.
- Using the setting barcode, it is set to inform that keys such as Enter(Tkinter's event name is Return), Tab etc. which are not normally included in the barcode as a suffix.
- Bind an event handler for the corresponding suffix key to the widget.
- In the event handler, move the focus to the next(or determined in some way) widget.
Please refer to the following.
Change the focus from one Text widget to another
Tkinter: When press 'Enter', then it goes to the next text box
answered Nov 14 '18 at 1:00
kunifkunif
1,097238
add a comment |
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2 Answers
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active
oldest
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2 Answers
2
active
oldest
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active
oldest
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active
oldest
votes
you can check to see if the first entry is empty and then switch focus to the second one
if len(the_first_entry_widget.get()) != 0:
the_second_entry_widget.focus()
answered Nov 13 '18 at 22:39
vencaslacvencaslac
1,183420
add a comment |
you can check to see if the first entry is empty and then switch focus to the second one
if len(the_first_entry_widget.get()) != 0:
the_second_entry_widget.focus()
answered Nov 13 '18 at 22:39
vencaslacvencaslac
1,183420
add a comment |
you can check to see if the first entry is empty and then switch focus to the second one
if len(the_first_entry_widget.get()) != 0:
the_second_entry_widget.focus()
answered Nov 13 '18 at 22:39
vencaslacvencaslac
1,183420
you can check to see if the first entry is empty and then switch focus to the second one
if len(the_first_entry_widget.get()) != 0:
the_second_entry_widget.focus()
answered Nov 13 '18 at 22:39
vencaslacvencaslac
1,183420
answered Nov 13 '18 at 22:39
vencaslacvencaslac
1,183420
answered Nov 13 '18 at 22:39
vencaslacvencaslac
1,183420
answered Nov 13 '18 at 22:39
vencaslacvencaslac
1,183420
1,183420
add a comment |
add a comment |
Most scanners can add suffix code to the scanned barcode data for notification.
The most commonly used is the Enter(Carriage Return) key, but the Tab key may also be used.
You can do as follows.
- Using the setting barcode, it is set to inform that keys such as Enter(Tkinter's event name is Return), Tab etc. which are not normally included in the barcode as a suffix.
- Bind an event handler for the corresponding suffix key to the widget.
- In the event handler, move the focus to the next(or determined in some way) widget.
Please refer to the following.
Change the focus from one Text widget to another
Tkinter: When press 'Enter', then it goes to the next text box
answered Nov 14 '18 at 1:00
kunifkunif
1,097238
add a comment |
Most scanners can add suffix code to the scanned barcode data for notification.
The most commonly used is the Enter(Carriage Return) key, but the Tab key may also be used.
You can do as follows.
- Using the setting barcode, it is set to inform that keys such as Enter(Tkinter's event name is Return), Tab etc. which are not normally included in the barcode as a suffix.
- Bind an event handler for the corresponding suffix key to the widget.
- In the event handler, move the focus to the next(or determined in some way) widget.
Please refer to the following.
Change the focus from one Text widget to another
Tkinter: When press 'Enter', then it goes to the next text box
answered Nov 14 '18 at 1:00
kunifkunif
1,097238
add a comment |
Most scanners can add suffix code to the scanned barcode data for notification.
The most commonly used is the Enter(Carriage Return) key, but the Tab key may also be used.
You can do as follows.
- Using the setting barcode, it is set to inform that keys such as Enter(Tkinter's event name is Return), Tab etc. which are not normally included in the barcode as a suffix.
- Bind an event handler for the corresponding suffix key to the widget.
- In the event handler, move the focus to the next(or determined in some way) widget.
Please refer to the following.
Change the focus from one Text widget to another
Tkinter: When press 'Enter', then it goes to the next text box
answered Nov 14 '18 at 1:00
kunifkunif
1,097238
Most scanners can add suffix code to the scanned barcode data for notification.
The most commonly used is the Enter(Carriage Return) key, but the Tab key may also be used.
You can do as follows.
- Using the setting barcode, it is set to inform that keys such as Enter(Tkinter's event name is Return), Tab etc. which are not normally included in the barcode as a suffix.
- Bind an event handler for the corresponding suffix key to the widget.
- In the event handler, move the focus to the next(or determined in some way) widget.
Please refer to the following.
Change the focus from one Text widget to another
Tkinter: When press 'Enter', then it goes to the next text box
answered Nov 14 '18 at 1:00
kunifkunif
1,097238
answered Nov 14 '18 at 1:00
kunifkunif
1,097238
answered Nov 14 '18 at 1:00
kunifkunif
1,097238
answered Nov 14 '18 at 1:00
kunifkunif
1,097238
1,097238
add a comment |
add a comment |
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