C++ multiple actions at once

Question

I'm making a program and I have a lot of labels that when you click on them they do the same thing and instead of writing them around 40 times is there a way to reduce it

private: System::Void lblHB15_Click(System::Object^  sender,  System::EventArgs^  e) {
    if (HBColumn1 == true) {
        drop (1);
    }
    if (row1 == 6) {
        btnRow1->Enabled = false;
        HBColumn1 = false;
    }
}

I want to combine multiple actions. I know in Visual Basic it's done by `Handles lblHB14.Click, lblHB13.Click` but I do not know how to do this in c++ — Matthew Iandoli, Sep 19 '15 at 19:53
BTW you *never* should write: `if (x == true)` because: `if (x)` will suffice, maybe `if (HBColumn1 != 0)` would make more sense to the reader (i.e. *you*)? — Paul Evans, Sep 19 '15 at 19:54
In this case it works best for me to see true or false because it tells me if the label should be enabled or disabled — Matthew Iandoli, Sep 19 '15 at 20:02
well in that case just get used to `if (HBColumn1)` meaning: if `HBColumn1` is `true` then... — Paul Evans, Sep 19 '15 at 20:23
still don't understand your question, please elaborate. Maybe show the VB code you're trying to emulate. — Paul Evans, Sep 19 '15 at 20:24
`Private Sub btnCompute_Click(sender As Object, e As EventArgs) Handles btnCompute.Click, btnClickme.Click` — Matthew Iandoli, Sep 19 '15 at 20:28

score 0 · Answer 1 · edited Mar 06 '23 at 00:44

So, your (Matthew's) situation was:

You were working on a GUI C++ coding.
You have so many visible and clickable "Label" objects (a basic concept of showing a squared area painted by a background color, with a text inside the area painted by a foreground color) on the screen with their own id(name):
lblHB1, lblHB2, lblHB3, lblHB4, ... , lblHB15, and so on.
Each of them has its own linked event (void functions):
lblHB1_Click(...), lblHB2_Click(...), lblHB3_Click(...), lblHB4_Click(...), ans so on.
And you have trouble, because it is not an efficient way to write every individual label's own click event.

The solution is:

You have to merge the objects first, to make things a lot easier.
Name the labels by exactly the same string. Yes, overlap the name of objects of the same kind like those labels.
Then, in your screen / IDE / developer tool set each to a unique "index number" of the objects with the same id (name), in any specific order that you wish.
As a result, you will have access to those labels with their names like: lblTitle[0], lblTitle[1], lblTitle[2], lblTitle[3], and so on. Yes! The labels are now declared as an array of label objects.
Having set the names and index numbers like this, the event will forward the only one function: lblTitle_Click(...). In this case, the parameter of click function must contain the index of the object. Your developing tool and API must have a specific way to deliver this expression.

Find and study the "indexing" and "event-handling the same kind of objects with the same name".

I removed some of the non-answer parts, and improved the formatting for clarity. — James Risner, Mar 06 '23 at 00:45

C++ multiple actions at once

1 Answers1