Hello,
Am I correctly guessing that TTreeView is not based on platform native implementation?
Thank
Mailing lists / lazarus / 2013-03
TTreeView question
12 messages · 7 people · –
- Mattias Gaertner 3
- Flávio Etrusco 2
- Lubos Pintes 2
- zeljko 2
- Felipe Monteiro de Carvalho 1
- Juha Manninen 1
- +1 more
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Lubos Pintes wrote 5 lines
Hello,
Am I correctly guessing that TTreeView is not based on platform native
implementation?
Thank
TTreeView is based on platform/widgetset native implementation.
-Fl?vio
There is a list of this here, thought it doesn't fully specify the case of TTreeView:
http://wiki.lazarus.freepascal.org/Roadmap#Status_of_TCustomControl_based_controls_on_each_widgetset
Felipe Monteiro de Carvalho
Am I correctly guessing that TTreeView is not based on platform native implementation?…
Show quoted text 6 lines
Lubos Pintes hat am 28. M?rz 2013 um 14:30 geschrieben:
Hello,
Am I correctly guessing that TTreeView is not based on platform native
implementation?
Its logic is platform independent. It uses the LCL theme drawing functions and colors.
Some native widgets have some nice features, but have often problems with more than a few thousands items.
Mattias
TTreeView is based on platform/widgetset native implementation. -Fl?vio
Show quoted text 12 lines
Fl?vio Etrusco hat am 28. M?rz 2013 um 14:39
geschrieben:
On Thu, Mar 28, 2013 at 10:30 AM, Lubos Pintes wrote:
> Hello,
> Am I correctly guessing that TTreeView is not based on platform native
> implementation?
> Thank
>
TTreeView is based on platform/widgetset native implementation.
No. Why do you think so?
Mattias
There is a list of this here, thought it doesn't fully specify the case of TTreeView:…
Interesting. On Windows it behaves like something custom drawn. The screen reader only sees display text, there is no feedback about nodes like collapsed/expanded etc.
So I will try to figure out why...
D?a 28. 3. 2013 14:44 Felipe Monteiro de Carvalho wrote / nap?sal(a):
Show quoted text 5 lines
There is a list of this here, thought it doesn't fully specify the
case of TTreeView:
http://wiki.lazarus.freepascal.org/Roadmap#Status_of_TCustomControl_based_controls_on_each_widgetset
Am I correctly guessing that TTreeView is not based on platform native implementation?…
Lubos Pintes wroteHello, Am I correctly guessing that TTreeView is not based on platform native implementation? Thank
No, it's not. LCL implementation takes TCustomControl from widgetset and draws/handles it on it's own.
There was some plans to make it so, but no spare time since it's an huge task.
z.
No. Why do you think so? Mattias
Mattias Gaertner wrote 17 lines
> Fl?vio Etrusco hat am 28. M?rz 2013 um 14:39
> geschrieben:
>
>
> On Thu, Mar 28, 2013 at 10:30 AM, Lubos Pintes wrote:
> > Hello,
> > Am I correctly guessing that TTreeView is not based on platform native
> > implementation?
> > Thank
> >
>
> TTreeView is based on platform/widgetset native implementation.
No. Why do you think so?
Mattias
Oops, my apologies then. Last time I saw at least the Win32 implementation was basically a wrapper around ComCtrl32 implementation...
-Fl?vio
Fl?vio Etrusco wroteOops, my apologies then. Last time I saw at least the Win32 implementation was basically a wrapper around ComCtrl32 implementation...
That is in Delphi.
Juha
Its logic is platform independent. It uses the LCL theme drawing functions and colors.…
Mattias Gaertner wrote 5 lines
Its logic is platform independent. It uses the LCL theme drawing functions and
colors.
Some native widgets have some nice features, but have often problems with more
than a few thousands items.
Do they still in windows versions that will be supported longer than an year from now, or is that old story?
Show quoted text 9 lines
On Thu, Mar 28, 2013 at 03:21:41PM +0100, Mattias Gaertner wrote:
> Its logic is platform independent. It uses the LCL theme drawing functions and
> colors.
>
> Some native widgets have some nice features, but have often problems with more
> than a few thousands items.
Do they still in windows versions that will be supported longer than an
year from now, or is that old story?
I don't know about windows. The gtk trees had problems.
Mattias
Mattias Gaertner wrote 14 lines
On Thu, 28 Mar 2013 22:03:17 +0100
Marco van de Voort wrote:
> On Thu, Mar 28, 2013 at 03:21:41PM +0100, Mattias Gaertner wrote:
>> Its logic is platform independent. It uses the LCL theme drawing functions and
>> colors.
>>
>> Some native widgets have some nice features, but have often problems with more
>> than a few thousands items.
>
> Do they still in windows versions that will be supported longer than an
> year from now, or is that old story?
I don't know about windows. The gtk trees had problems.
But it was problem with gtk1, not gtk2 afair.
Anyway it is better to keep LCL treeview implementation since it's much faster eg. lcl treeview is x10 faster than QTreeView (qt native treeview) with few thousand items.
z.