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2003-12-04 12:28:38 PM
cppbuilder57
Hi,
From what I know, when TListView was hide will have problem
to access the TListView->Items data. It must be at least 1 pixel width
and visible. Why?
So my question how can I force TListView to create a node/item even
it was hide.
Regards
KL Chin
 

"KL Chin" < XXXX@XXXXX.COM >wrote in message
that was 0 pixels high. It worked fine.
Gambit
 

Hi Remy,
Thx for ur reply.
I will re-check again.
Regards
KL Chin
"Remy Lebeau (TeamB)" < XXXX@XXXXX.COM >wrote in message

{smallsort}

Hi
I miss an event in TListView
TList.OnItemCheckboxClick or something like that ;)
 

Ah yes found other newsgroup message.
This even should do the trick :P*:D
procedure TFormMain.ListViewReceiverMulticastMembershipChanging(
Sender: TObject; Item: TListItem; Change: TItemChange;
var AllowChange: Boolean);
:)
 

Actually this OnChange is better than OnChanging for what I want to do...
Otherwise it is vice versa :d
procedure TFormMain.ListViewReceiverMulticastMembershipChange(
Sender: TObject; Item: TListItem; Change: TItemChange);
begin
if (Change = ctState) then
begin
if Item.Checked then
begin
ShowMessage('checked');
end else
begin
ShowMessage('unchecked');
end;
end;
end;
 

Hmmm seems like both events are needed to determine which property changed
:D
Since these events are used for different properies doh.
 

Hmmm it's not as easy as it seems.
Many of these events occur.. which requires the checkbox checked state to be
stored for each list item !
 

Ok,
I found the solution.
On adding and removing items prevent the OnChange and OnChanging events from
happening
( These will otherwise occur a lot and for different items. For example when
removing an item
some of these event will happen becomes a select property changed... and
then the checked
property of another item is assign to the boolean which you dont want :D )
procedure ButtonAddOrRemoveClick Etc
var
TempOnChange : TLVChangeEvent;
TempOnChanging : TLVChangingEvent;
begin
// prevent OnChange and OnChanging events from happening
TempOnChange := ListView.OnChange;
TempOnChanging := ListView.OnChanging;
ListView.OnChange := nil;
ListView.OnChanging := nil;
// code to add or remove here
// re-enable On Change Event
ListView.OnChange := TempOnChange;
ListView.OnChanging := TempOnChanging;
end;
FormVariable:
var
mReceiverMulticastMembershipItemChecked
Then in OnChange:
procedure TFormMain.ListViewReceiverMulticastMembershipChange(
Sender: TObject; Item: TListItem; Change: TItemChange);
begin
if (Change = ctState) then
begin
// als deze twee verschillen dan is het verandert.
if (mReceiverMulticastMembershipItemChecked <>Item.Checked) then
begin
if Item.Checked then
begin
ShowMessage('checked');
end else
begin
ShowMessage('unchecked');
end;
mReceiverMulticastMembershipItemChecked := Item.Checked;
end;
end;
end;
And in onChanging:
procedure TFormMain.ListViewReceiverMulticastMembershipChanging(
Sender: TObject; Item: TListItem; Change: TItemChange;
var AllowChange: Boolean);
begin
if (Change = ctState) then
begin
mReceiverMulticastMembershipItemChecked := Item.Checked;
end;
end;
Hehe :) works perfectly (for so far tested :) :P ) {*word*30}ing yeah ! :D
 

Can someone give me an example on how to set the fontstyle
on a listview row if its checked using the checkbox?
Right now i am testing something small to make it work. I have
five items in my listview with checkboxes enabled. When i check
an item, i would like it to change the font style.
Curtis
 

"Curtis Richards" < XXXX@XXXXX.COM >wrote in message
manually by owner-drawing the items yourself.
Gambit
 

I am looking for a TListView type component that is fast and has auto-sorting when clicking on a column, preferably free. I am using D2005 and it needs to be available in the .net component pallete. I've tried TCoolListView, TdfsExtListView and TExtListViewCtrl but none of them seem to be compatible with D2005 .net or I am doing something wrong on package creation. Can anyon suggest where to get one from, preferably one that's tried and tested with .net Apps created in D2005.
Many thanks
 

I have a TListView with ViewStype = vsReport, and the first time I add an
item the values do not appear. All additional items appear fine.
TListItem *tli = ListViewLaps->Items->Add();
static int Lap = 1;
if (tli)
{
tli->Caption = Lap++;
tli->SubItems->Add(LapTime);
tli->SubItems->Add(Pace);
tli->SubItems->Add(Position);
}
I have this code attached to a button. The first time I click the button
nothing appears. The second time it works and the Lap value displayed = 2.
Thanks for any tips!
Doug
 

"Douglas Hay" < XXXX@XXXXX.COM >wrote in message
Add() fails, it will throw an exception.
Gambit
 

Hi,
I need some tutorials or examples for this component
Can anybody help me?
Enrico