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Combo text triggering |
Tue, Oct 3 2017 11:48 AM | Permanent Link |
Matthew Jones | The Button Combo Box can take text input. There is the KeyPressInterval property which allows us to control when the reset of the built up text search is reset.
Is it possible to delay the trigger of the OnChange until that time occurs? I ask because I am doing a lookup on the OnChange, and the combo gets closed - not sure if that is me or it, perhaps losing focus. But it means that the user cannot continue to use the drop down to mouse up and down. Hmm, maybe I'm not being clear. I need to see exactly what is happening when. In the meantime, if delaying the OnChange is possible, let me know! -- Matthew Jones |
Tue, Oct 3 2017 2:10 PM | Permanent Link |
Tim Young [Elevate Software] Elevate Software, Inc. timyoung@elevatesoft.com | Matthew,
<< The Button Combo Box can take text input. There is the KeyPressInterval property which allows us to control when the reset of the built up text search is reset. Is it possible to delay the trigger of the OnChange until that time occurs? >> That's exactly what it does. If the KeyPressInterval hasn't been met or exceeded yet, then the control keeps the item index for the drop-down list as-is. Tim Young Elevate Software www.elevatesoft.com |
Wed, Oct 4 2017 4:08 AM | Permanent Link |
Matthew Jones | Tim Young [Elevate Software] wrote:
> Is it possible to delay the trigger of the OnChange until that time occurs? >> > > That's exactly what it does. It is, and it isn't. 8-) Create a simple form, buttoncombo, label. Set keypress time to 2000 to ensure test is good. Add OnChange event as below. Add list items: one two three four threesome five 1234567890 six threemore Now watch as you type "four". Or threemore (or threesome). What happens is that the OnChange is triggered whenever the selection "jumps" to a new match. Which means that it is pretty much guaranteed to jump the first time, and then again for each change. I just have to work out how I'm stealing focus that the creation of new windows is causing the combo to close. -- Matthew Jones TForm1 = class(TForm) ButtonComboBox1: TButtonComboBox; Label1: TLabel; procedure ButtonComboBox1Change(Sender: TObject); private { Private declarations } m_nCount : Integer; public { Public declarations } end; var Form1: TForm1; implementation procedure TForm1.ButtonComboBox1Change(Sender: TObject); begin Inc(m_nCount); Label1.Caption := IntToStr(m_nCount); end; |
Wed, Oct 4 2017 12:07 PM | Permanent Link |
Tim Young [Elevate Software] Elevate Software, Inc. timyoung@elevatesoft.com | Matthew,
<< Now watch as you type "four". Or threemore (or threesome). What happens is that the OnChange is triggered whenever the selection "jumps" to a new match. Which means that it is pretty much guaranteed to jump the first time, and then again for each change. >> So, what you're saying is that you want the *first* keystroke to observe the keypress interval also ? Apart from that behavior, I'm not seeing any other change events within the keypress interval timeframe, which is exactly how it should behave. Tim Young Elevate Software www.elevatesoft.com |
Wed, Oct 4 2017 12:13 PM | Permanent Link |
Matthew Jones | Tim Young [Elevate Software] wrote:
> So, what you're saying is that you want the first keystroke to observe the keypress interval also ? Yes, nothing until the time ticks away. That said, right now people can choose how to handle it - tick away or immediate, so perhaps leaving as-is is the best option anyway. If you take it away, it removes the choice. -- Matthew Jones |
Wed, Oct 4 2017 1:46 PM | Permanent Link |
Tim Young [Elevate Software] Elevate Software, Inc. timyoung@elevatesoft.com | Matthew,
<< Yes, nothing until the time ticks away. That said, right now people can choose how to handle it - tick away or immediate, so perhaps leaving as-is is the best option anyway. If you take it away, it removes the choice. >> Actually, it's better to use a timer, so I changed it to do so. There's all sorts of weirdness with the way that it's being done now, and with a timer it's very consistent from front to back. Tim Young Elevate Software www.elevatesoft.com |
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