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Curtis Richards · Guest

I am using the following code to add a checkbox into
a certain column of my listview. I can't seem to get
the checkbox to check using the OnMouseDown()
event.

// draw the checkbox in the listview
DrawFrameControl(ListView1->Canvas->Handle, &Rect, DFC_BUTTON,
DFCS_BUTTONCHECK);

void __fastcall TForm1::ListView1MouseDown(TObject *Sender,
TMouseButton Button, TShiftState Shift, int X, int Y)
{
TListItem* Item = ListView1->GetItemAt(X, Y);
THitTests HitTests = ListView1->GetHitTestInfoAt(X, Y);

if((Item) && (HitTests.Contains(htOnButton)))
ShowMessage("Checkbox was clicked on");
}
//---------------------------------------------------------------------------

If i use htOnStateItem the message will fire whenever i click on the
row. But i only want it to check the checkbox whenever i click on
the checkbox, and not the entire row.

One more thing, how do you actually check and uncheck the checkbox?

Thanks.

Curtis

Curtis Richards · Guest

Can't seem to get an answer to that question, let me try a
different procedure.

This is my code to draw the items on the listview.

void __fastcall TForm1::ListView1DrawItem(TCustomListView *Sender,
TListItem *Item, TRect &Rect, TOwnerDrawState State)
{

if( State.Contains(odSelected) )
{
ListView1->Canvas->Brush->Color = clHighlight;
ListView1->Canvas->Font->Color = clHighlightText;
}
else
{
ListView1->Canvas->Brush->Color = ListView1->Color;
ListView1->Canvas->Font->Color = ListView1->Font->Color;
}

ListView1->Canvas->FillRect(Rect);

DrawCheckBox(&Status, Rect);
}

Then i use an imagelist to place a bitmap in the listview, there are two
bitmaps,
one unchecked and one checked.

void __fastcall TForm1::ListView1MouseDown(TObject *Sender,
TMouseButton Button, TShiftState Shift, int X, int Y)
{
if(Button == mbLeft)
{
if(ListView1->GetHitTestInfoAt(X, Y).Contains(htOnStateIcon))
{
// clicking on the check box, do something to toggle the
check...
TListItem *Item = ListView1->GetItemAt(X, Y);
if(Item)
{
ListView1->UpdateItems(Item->Index, Item->Index);
ShowMessage("Checkbox Checked!!");
}
}
}
}

void TForm1::DrawCheckBox(Status* Info, TRect &Rect)
{
Rect.Left += 100; //ListView1->Columns->Items[3]->Width;

int ImgWidth = ImageList2->Width;
int ImgHeight = ImageList2->Height;

int X = (Rect.Left + ((Rect.Width() - ImgWidth) / 2));
int Y = (Rect.Top + ((Rect.Height() - ImgHeight) / 2));

ImageList2->Draw(ListView1->Canvas, X, Y, Info->Processing, true);
}

What do i have to do to make the checkbox check and uncheck? This is
getting
pretty tough.