Arrow Keys code and QT buttons

[Bert Mariani]

Hello Mahmoud et ALL

I am trying to get the "Arrow Keys" code when the Up/Down.Left/Right keys are pressed.

Attached are 2  identical ring files

    TestKeyPressChar-NO-QT-Buttons.ring      ### Char code is returned.       The QT section is commented out

    TestKeyPressChar-WITH-QT-Buttons.ring  ### Char code NOT returned.  The QT section is enable

Screen capture shows behaviour.

Question:

     How can the Arrow Keys code be captured / returned  when a program uses QT ?

-----------------------------------------------------

Code

# KeyPress Code: 16777234 = < left

# KeyPress Code: 16777235 = ^ up

# KeyPress Code: 16777237 = v down

# KeyPress Code: 16777236 = > right

Func pWork

myChar = myfilter.getkeycode() 

win.setWindowTitle('KeyPress! : ' + myfilter.getkeycode() +" = "+ char(myChar) )

See "KeyPress Code: "+ myfilter.getkeycode() +" = "+ char(myChar) +nl 

------------------------------------------

[Mahmoud Fayed]

Hello Bert

The Events Filter is an Object

Try installing this object to the buttons too

Greetings,

Mahmoud

[Mahmoud Fayed]

Hello Bert

The update to the code will be as in the next screen shot

Greetings,

Mahmoud

[Mahmoud Fayed]

Hello Bert

Also, the next keys are defined automatically by RingQt

Qt_Key_Escape = dec("1000000")    
Qt_Key_Tab = dec("1000001")    
Qt_Key_Backtab  = dec("1000002")    
Qt_Key_Backspace= dec("1000003")
Qt_Key_Return = dec("1000004")
Qt_Key_Enter  = dec("1000005")
Qt_Key_Insert = dec("1000006")    
Qt_Key_Delete = dec("1000007")    
Qt_Key_Pause  = dec("1000008")
Qt_Key_Print    = dec("01000009")
Qt_Key_SysReq    = dec("0100000a")
Qt_Key_Clear    = dec("0100000b")    
Qt_Key_Home    = dec("01000010")
Qt_Key_End    = dec("01000011")
Qt_Key_Left    = dec("01000012")
Qt_Key_Up    = dec("01000013")
Qt_Key_Right    = dec("01000014")
Qt_Key_Down    = dec("01000015")
Qt_Key_PageUp    = dec("01000016")
Qt_Key_PageDown    = dec("01000017")
Qt_Key_Shift    = dec("01000020")
Qt_Key_Control    = dec("01000021")

So, we can direcly use Qt_Key_Up, Qt_Key_Down, Qt_Key_Left & Qt_Key_Right

Source Code : https://github.com/ring-lang/ring/blob/master/extensions/ringqt/guilib/qt.rh

Greetings,

Mahmoud

[Bert Mariani]

Hello Mahmoud

Thank you for the suggestions.

The "installEventsFilter(myFilter)"  inside the Button does not work

It is not part of a Button parameter

      Error (R14) : Calling Method without definition !: installeventsfilter

I have seen these  Word to Code mappings in the docs

     Qt_Key_Left    = dec("01000012")

How can the program know when a User pressed the Arrow Keys ?

The "setKeyPressEvent(pWork)"  does not seem to be generated when QT is in the program.

[Mahmoud Fayed]

Hello Bert

Test again, as in the next screen shot

It works on my machine, the QPushButton class inherits from the QWidget class

Greetings,

Mahmoud

[Bert Mariani]

Hello Mahmoud

It worked.

It was my mistake before --- did not pay close enough attention.

I had  typed the line after the closing brace   }   

Thanks again !                        

=====================

FIXED

###>>> WITH QT Buttons     

      width  = 100

      height = 100

       for Row = 1 to size

            for Col = 1 to size

             Button[Row][Col] = new QPushButton(win) {

                  x = (Row-1)*width

                  y = (Col-1)*height

                  setgeometry(x,y,width,height)

                  setclickevent("UserLeftMouse(" + string(Row) + "," + string(Col) + ")")

                  setSizePolicy(1,1) 

                  installEventFilter(myFilter)

               }                  

         next

        next

[Mahmoud Fayed]

Hello Bert

You are welcome :D

Greetings,

Mahmoud