Project Counter

[Aliaa Fakhri]

Dear all, I am currently doing a small project for counter counting.
I got confuse with my logic error.

The situation are  (for Increment part )
1. when we click the colorful button, the value of the button will increment
2. in the same time, the value for Output box will also increment and appear in the textbox.

For the undo button,
how can I undo the value of the selected button and in the same time the output box will also decrease its value?

Thank you, please help me :)

[Chris Ward]

Hello Aliaa

To enable undo, you need to record all the associated actions - you can add them to a List.

For example - User Clicks a Red Button. The Red Button value is incremented and the Output Box is Incremented:

Record:

Red_ButtonID, increment

User then Clicks a Blue Button:

Record:

Red_ButtonID, increment

Blue_ButtonID, increment

User then Clicks a Green Button:

Record:

Red_ButtonID, increment

Blue_ButtonID, increment

Green_ButtonID, increment

When the User clicks Undo:

Green Button Value and Output Value are reduced by the amount recorded. Record is removed.

When the User clicks Undo again:

Blue Button Value and Output Value are reduced by the amount recorded. Record is removed.

When the User clicks Undo again:

Red Button Value and Output Value are reduced by the amount recorded. Record is removed

When the User clicks Undo again:

Nothing happens because the Undo Record is empty.

[ABG]

Your button .Text values look to have 2 or 3 parts.

Do you only want to increment the last part?

Abg

[Aliaa Fakhri]

okey, I understand but still figuring it out. thanks!

[Aliaa Fakhri]

to simplify about the counter, here the example.
I need to count the quantity of the size and display the output in the text box, but I still got stuck with the logic.
let's say we have a bundle of shirts, so we want to track the quantity of each size S, M,L and XL.
so, I need to click one by one the size to calculate the output. 

[ABG]

The logic to this is similar to that of the Fruit Stand sample at

https://groups.google.com/d/msg/mitappinventortest/NF6j--NJc-E/hPfG8JDwFQAJ

ABG

[Ghica]

This would be a nice example for using the when... any blocks. Therefore here an example:

There are several lists to handle:

• a list with thetext on the buttons (the sizes: S,M,L,XL)
• totals for each of these sizes. For example, M has index 2 in the sizes list, therefore its total will be found at index 2 in the totals list.
• An undo list. This just records the clicks you make on the buttons, in reverse order. If you click S,S,M,XL then the list will look XL,M,S,S. This makes the list easier to handle: you always insert or remove the first element.

The when any button clicked event is called when you click any button. There are specific events for Undo and Reset, so they have their own event logic,

The setTotals procedure gets as parameter the text on the button or the character in the undo list. And an indication whether the total should be increased (if the S,M,L or XL button was pressed) or decreased (if Undo was pressed).

The show procedure is a bit primitive, it is just to show that it works.

The ListView is there to show the undo list, handy for debugging. Make it invisible or remove it when finished debugging.

For your convenience I also attached the .aia

Cheers, Ghica

[TimAI2]

 @ Ghica

[Aliaa Fakhri]

Thanks Ghica, you're the best!