1. Subhabrata Das
  2. PowerBuilder
  3. Wednesday, 20 April 2022 19:53 PM UTC

Hi Everyone,

Is there any way to control the acceleration of an editmask spin control?? 

If user keeps up/down arrow pressed of an editmask spin control it changes the display value at a certain rate. Is there any way to increase or decrease this acceleration of the display value.

Following are the few details:

  • Powerbuilder Version: 2017 R3 Build 1880
  • Control Type : EditMask (Spin)
  • Using CodeTable
  • Increment = 1
  • Min = 1
  • Max = 10

Has anyone encountered this issue and Is there any way to resolve the same??

Thank you!!

Accepted Answer
John Fauss Accepted Answer Pending Moderation
  1. Wednesday, 27 April 2022 17:59 PM UTC
  2. PowerBuilder
  3. # Permalink

Hello, all -

Having some spare time time while I'm away from work for a couple of days, I've come up with a solution for this problem. I created a small example app to demonstrate the solution, which is attached to this post as a zip file. The app was created using PB 2017 R3 and it is 100% PB, no Windows API function calls are used.

To accomplish the goal of slowing down the repeat rate when the left-mouse-button (LMB) is held down on an edit mask control's spin button, I created a custom edit mask control inherited from the standard control. In the custom edit mask control, I added a user event mapped to the pbm_enchange event. This event is triggered each time the user changes the data value in the control, either by typing or by clicking on a spin button. When the LMB is held down on a spin button, PB triggers this event repeatedly, approximately every 0.155 seconds. This timing is NOT configurable.

Then it occurred to me: To effectively slow down the repeat rate, maybe it is possible to prevent the data value from being changed until every second, or third, or fourth, etc. event occurs. After handling a few complicating conditions, it appears to work! A dedicated Timing object is needed in order to detect when the LMB is no longer being held down, since the typical LButtonDown/LButtonUp events do not get passed along to the application when the user clicks on a spin button.

To incorporate this functionality into your own application, you need to export the n_timing_editmask and u_editmask_slowdown objects from the sample application and import them into your app's PBL (Note: Import the Timing object first, then the custom edit mask control to get a clean import), then replace an existing edit mask control with the u_editmask_slowdown user object. It contains a method to set the slow-down factor for the spin buttons in the range 1-10. A factor of 1 means a normal repeat rate, no slow-down, and 10 is a pretty extreme slow-down. I found that using a factor of 3 or 4 provides a nice user experience.

Subhabrata, I hope this provides you with an acceptable solution to the issue and puts a smile on your user's face.

Best regards, John

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Comment
  1. Subhabrata Das
  2. Thursday, 28 April 2022 11:08 AM UTC
I really appreciate the time and effort you have put into identifying and providing a solution for this issue. Thank you so much for the help and support!!
  1. Helpful
  1. John Fauss
  2. Thursday, 28 April 2022 18:07 PM UTC
You're welcome! Please be sure to test the customized edit control thoroughly - I believe it to be working correctly with no ill behavior, but there is a possibility I overlooked something. Good luck!
  1. Helpful
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John Fauss Accepted Answer Pending Moderation
  1. Wednesday, 20 April 2022 22:19 PM UTC
  2. PowerBuilder
  3. # 1

Every Windows user can adjust the "repeat delay" (how long before a keystroke begins to repeat) and the "repeat rate" (how fast the held key repeats) of their keyboard.

Control Panel:

In the Keyboard Properties dialog, adjust the Repeat delay and rate sliders as desired:

You can test the changed values in the input field provided.

 

Comment
  1. Subhabrata Das
  2. Monday, 25 April 2022 07:37 AM UTC
This issue is happening for mouse clicks. When users click (Mouse: Left Mouse Button) the up/down in a spin control then only they are experiencing the issue. Even for a single mouse click spin rolls twice or thrice.
  1. Helpful
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Chris Pollach @Appeon Accepted Answer Pending Moderation
  1. Wednesday, 20 April 2022 20:37 PM UTC
  2. PowerBuilder
  3. # 2

Basically no but, tell the user not to hold the arrow keys down. Just on quick push (tab) at a time in either direction.

Comment
  1. Subhabrata Das
  2. Monday, 25 April 2022 07:39 AM UTC
This is happening for mouse clicks. Even, for a single click, spin control is changing the display value twice or thrice.
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