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Long Touch event generation method for Delphi XE5~XE7

Discussion in 'Delphi Android And IOS' started by N0body, Oct 15, 2014.

  1. N0body
    Online

    N0bodyN0body is a Verified Member DelphiFan Administrator Staff Member DF Staff

    OnMouseClick event is used for Short Touch event in Button or ListBox, etc.
    Delphi in FireMonkey do not provide a Long touch event separately.
    Android or iOS smart device determines a long Touch time about 0.7 to 1.0 seconds normally .
    Thus, Long Touch can be determined by measuring the count timer 0.1 seconds while pressing the button or any other objects.

    [Method]
    1. OnMouseDown : Timer Start
    2. OnMouseUp : Count Timer ~ Short Touch Event
    3. OnTimer : Increase Timer Count ~ Long Touch Event

    [Example source code]
    1. Timer Initialize
    Enable : False
    Interval : 100 (msec)

    2. Global variable declaration

    Code:
    var
      ClickInterval : Cardinal = 0;
    const
       LONG_TIME = 8;  // Long Touch Time : 0.8 sec
    

    3. Event Handlers work

    Code:
    procedure TForm1.ListBoxItem1MouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Single);
    begin
       ClickInterval := 0;
       Timer1.Enabled := TRUE;
    end;
    
    //**********************************************************************************
    // Short Touch
    procedure TForm1.ListBoxItem1MouseUp(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Single);
    begin
       if ClickInterval < LONG_TIME then
       begin
          Timer1.Enabled := FALSE;
          ClickInterval := 0;
          ShowMessage( 'ListBox Shot Touch..!!');
        end;
    end;
    
    //***************************************************************************************
    // Long Touch
    // Called once every 0.1 seconds ->  When the 8th call is a Long touch
    procedure TForm1.Timer1Timer(Sender: TObject);
    begin
       ClickInterval := ClickInterval + 1;
    
       if ( ClickInterval = LONG_TIME ) then
       begin
          Timer1.Enabled := FALSE;
          ShowMessage( 'ListBox Long Touch..!!');
       end;
    end;
    
    Download HERE
     
  2. chrpaz
    Offline

    chrpaz Guest

    thanks
     
  3. zhuye999
    Offline

    zhuye999 DF Junior

    [font='Open Sans', Arial, Tahoma, Verdana, sans-serif]thanks[/font]
     
  4. mndoza
    Offline

    mndoza DF Junior

    Thanks


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