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  • Position of several pointers
  • Limitations
  • Various
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Stored procedures
GestureCurrentPointer (Function)
In french: GestePointeurEncours
Returns the pointer index (finger or stylus) that triggered the call of a specific multi-touch event in an Image control.
This index can be used by GesturePosX and/or GesturePosY to get the vertical and/or horizontal position of the corresponding pointer.
Versions 18 and later
iPhone/iPad This function is now available for iPhone/iPad applications.
New in version 18
iPhone/iPad This function is now available for iPhone/iPad applications.
iPhone/iPad This function is now available for iPhone/iPad applications.
Versions 19 and later
WEBDEV - Browser code This function is now available in browser code.
New in version 19
WEBDEV - Browser code This function is now available in browser code.
WEBDEV - Browser code This function is now available in browser code.
Example
// Retrieve the horizontal position of the pointer that triggered
// the call to the "Pressed" event associated to an Image control
PositionX is int
PositionX = GesturePosX(GestureCurrentPointer())
Syntax
<Result> = GestureCurrentPointer()
<Result>: Integer
Pointer index (finger or stylus) that triggered the call of a "Pressed" or "Released" event associated with an Image control. The first pointer that touches the screen corresponds to index 1.
Remark: In the Android simulator or emulator, this number is always equal to 1.
Remarks
Android

Position of several pointers

To manage several pointers on the screen, the device must be equipped with a multi-touch display..

Limitations

  • Android This function is only available on devices with Android 2.2 or later (api level 8).
    A fatal error occurs if the function is used with an earlier system version.
    To determine the version of Android the application is running on, use SysAndroidVersion.
  • Use condition:
    • This function must be called in the events of an Image control that triggered the call to the events for each pointer: option "Recall processes for each pointer (multiple pointers)" in the "Details" tab of the control description.
    • This function must be called in one of the following events of the control: "Pressed", "Released", "Scroll with finger", "Horizontal and vertical swipe" or "Zoom with finger". Otherwise, the function will always return 1.
  • iPhone/iPadIOS WidgetMac Catalyst Up to 2 pointers can be supported.
  • WEBDEV - Browser code The browser used must support the multi-touch feature.

Various

  • To find out the horizontal position (X) of a pointer, use GesturePosX.
  • To find out the vertical position (Y) of a pointer, use GesturePosY.
  • To find out the number of pointers in contact with the screen, use GestureNbPointer.
Component: WDJS.DLL
Minimum version required
  • Version 17
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