Hi,

I have seen "Pointer to an array ..." several times on MSDN, like here (see "pButtons").

How can one point to an Array object?

You don't point to an Array object (as in a native JScript array), you use DataBlocs like you would for any other type.

e.g. for your TASKDIALOG_BUTTON array you would create a DataBloc the size of one item (8 bytes I think) times however many buttons there are.

Maybe a bit more complicated within that huge struct though or not, it's a pointer, not inline like I thought. Just create a seperate DataBloc for the array and write the .DataPtr into the main struct.

Does that mean:

Interop.Allocate(arrButtons.lenght * 8);

To make such array, you basically make a structure with all elements inserted the one after the other. It's easier to explain this by code:

code:

---

var cButtons = 2; //The number of buttons
var pButtons = Interop.Allocate(cButtons * 8); //8 bytes per button

//First button
var nButtonID1 = 0x100; //Identifier for this button
var sButtonText1 = "Button Text 1";
var pszButtonText1 = Interop.Allocate(sButtonText1.length*2+2);
pszButtonText1.WriteString(0, sButtonText1);
pButtons.WriteDWORD(0*4, nButtonID1);
pButtons.WriteDWORD(1*4, pszButtonText1.DataPtr);

//Second button
var nButtonId2 = 0x101; //Identifier for this button
var sButtonText2 = "Button Text 2";
var pszButtonText2 = Interop.Allocate(sButtonText2.length*2+2);
pszButtonText2.WriteString(0, sButtonText2);
pButtons.WriteDWORD(2*4, nButtonID);
pButtons.WriteDWORD(3*4, pszButtonText2.DataPtr);

//Use in your structure
TASKDIALOGCONFIG.WriteDWORD(/* position here */, cButtons); //cButtons
TASKDIALOGCONFIG.WriteDWORD(/* position here */, pButtons.DataPtr); //pButtons

//After calling TaskDialogIndirect
pszButtonText1.Size = 0;
pszButtonText2.Size = 0;
pszButtons.Size = 0;
TASKDIALOGCONFIG.Size = 0;

---

code:

---

/*
    FUNCTION CreateTaskDialogButtonsConfig
    aButtons    - Array with button texts.
    nBaseID    - Number to use as base for the identifiers. Optional.
                  Each button's ID will be set to: nBaseID + index.
                  Defaults to 0x100. (just an easy random number)
    Return value: Object with the following syntax:
        {
            struct: The pButtons structure.
            psz:    Array of psz's which need to be destroyed after use.
        }
*/
function CreateTaskDialogButtonsConfig(aButtons, nBaseID) {
    nBaseID = (typeof nBaseID === 'number') ? nBaseID : 0x100;
    var Result = {};
    var pszArray = [];

    var pButtons = Interop.Allocate(aButtons.length * 8);
    for(var i=0; i<aButtons.length; i++) {
        var sButtonText = aButtons[i];
        var psz = Interop.Allocate(sButtonText.length*2+2);
        psz.WriteString(0, sButtonText);
        pszArray.push(psz);
        pButtons.WriteDWORD(i*8, nBaseID + i);
        pButtons.WriteDWORD(i*8+4, psz.DataPtr);
    }

    return {
        struct: pButtons,
        psz: pszArray
    };
}

---

code:

---

var aButtons = ["Text 1", "Text 2"];

var TaskDialogButtons = CreateTaskDialogButtonsConfig(aButtons, 0x100);
var pButtons = TaskDialog.struct;
var pszArray = TaskDialog.psz;

//Use in your structure
TASKDIALOGCONFIG.WriteDWORD(/* position here */, aButtons.length); //cButtons
TASKDIALOGCONFIG.WriteDWORD(/* position here */, pButtons.DataPtr); //pButtons

//After calling TaskDialogIndirect
for(var i=0; i<pszArray.length; i++) pszArray[i].Size = 0;
pButtons.Size = 0;
TASKDIALOGCONFIG.Size = 0;

---

It appears to me that I've got a code quite similar to that, but a bit more flexible:

code:

---

        // Create the BUTTONS "array"
        var BUTTONS = Interop.Allocate(Math.min(arrButtonIds.length,arrButtonLabels.length) * 8);
   
        // Create the array for the buttons and the button labels
        var BUTTONS_ARRAY = new Array();
        var BUTTONTEXTS = new Array();
   
        // Write'em all into a DataBlock object
        for(var i = 0; i < Math.min(arrButtonIds.length,arrButtonLabels.length); i++) {
            // Write the current button's label into a DataBlock object
            BUTTONTEXTS[i] = Interop.Allocate((arrButtonLabels[i].length + 1) * 2);
            BUTTONTEXTS[i].writeSTRING(0,arrButtonLabels[i]);
   
            // Write the remaining required data into a DataBlock object
            BUTTONS_ARRAY[i] = Interop.Allocate(4 + Math.min(arrButtonIds.length,arrButtonLabels.length) * 8);
            with(BUTTONS_ARRAY[i]) {
                writeDWORD(0,arrButtonIds[i]);
                writeDWORD(4,BUTTONTEXTS[i].DataPtr);
            }
        }
    }

---

quote:

---

Originally posted by SmokingCookie
I seem to get E_INVALIDARG errors, an indication of either a stupid typo, or a major error..

---

I'll have a look in detail later, because task dialogs are quite interesting
First thing I noticed was that you are using both members of the icon unions, that's not how unions work.

Unions (C++)

Aha, that explains a lot. So basically, that parameter is "overloaded" with a UINT and a HICON?
I'll see if that fixes something...

EDIT: I FIXED IT!!!
It is WORKING!!! WAAHOOO!!! <

This post will soon be updated with the TaskDialogIndirect implementation script. I'm currently working on getting everything right.

Allright, I need some help. I'm looking for the value of the following constants:

code:

---

TD_WARNING_ICON
TD_ERROR_ICON
TD_INFORMATION_ICON
TD_SHIELD_ICON
TD_QUESTION_ICON

---

code:

---

#define MAKEINTRESOURCEW ((LPWSTR)((ULONG_PTR)((WORD))))

#define TD_WARNING_ICON         MAKEINTRESOURCEW(-1)
#define TD_ERROR_ICON           MAKEINTRESOURCEW(-2)
#define TD_INFORMATION_ICON     MAKEINTRESOURCEW(-3)
#define TD_SHIELD_ICON          MAKEINTRESOURCEW(-4)

---

@andrewdodd13:
Yes, I already found those #define things. The only problem is: what the heck do I have to do with the MAKEINTRESOURCEW? Is it like writing a WORD in a DataBloc and then what? I don't quite understand how I should go on implementing the MAKEINTRESOURCEW...

I've updated the attachment in my original post with the working version of the TaskDialogIndirect implementation. Feel free to have a go with it.

NOTE: I fixed it. Please check Mattike's reply to [WHAT??] Array pointers.

Hours of research have given me these nothing


By the way, about unions: I;ve read the C++ article about them, and I understand that I can omit either the hIcon or the TD_X_ICON?