Re: [Lazarus] Code comment conflicts with code in LCL

[Juha Manninen via Lazarus]

On Sun, Feb 4, 2018 at 12:17 AM, Graeme Geldenhuys via Lazarus
 wrote:
>   // no Graphics or Controls can be used here to prevent circular references

I fixed the comment in r57276.
Controls indeed cannot be used there. It creates a circular reference.

Juha
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Re: [Lazarus] Lazarus trunk: AV on rightClick on Component-pallette: ShowAll

[Juha Manninen via Lazarus]

On Thu, Feb 8, 2018 at 11:16 PM, john Landmesser via Lazarus
 wrote:
> Without own components it is ok but this AV appears again after compiling
> with my extra components?!!

Ok, there you go...
Do the components work when added from the palette?
Your stack trace is usable but better still would be a proper GDB backtrace.
Run Lazarus under GDB and then type "bt" after the AV.

> Ctrl-Alt-P is already defined on my Linux XFCE

The same window can be opened also from menu View -> Components.

Juha
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Re: [Lazarus] Lazarus trunk: AV on rightClick on Component-pallette: ShowAll

[John Landmesser via Lazarus]

same experience for Linux XFCE and own components installed -> AV with 
these messages:



TLazarusManager.Run starting /home/john1/lazarus/lazarus ...
Hint: (lazarus) [TMainIDE.ParseCmdLineOptions] 
PrimaryConfigPath="/home/john1/.lazarus"
Hint: (lazarus) [TMainIDE.ParseCmdLineOptions] 
SecondaryConfigPath="/etc/lazarus"
Hint: (lazarus) [TBuildManager.SetBuildTarget] Old=x86_64-linux-gtk2 
New=x86_64-linux-gtk2 FPC=True LCL=False
TObjectInspectorDlg.FillPersistentComboBox: Updating ComboBox with 
components
TObjectInspectorDlg.FillPersistentComboBox: Updating ComboBox with 
components

TComponentTreeView.SetSelection: Updating component node values.
TLazSourceFileManager.LoadLFM Creating designer for hidden component 
of /run/media/john1/ntfs1/PROJEKTE/Lazarus/Anleitung/unit1.pas
TLazSourceFileManager.InitOpenedProjectFile select form in designer: 
Form1:TForm1 TDesigner
TObjectInspectorDlg.FillPersistentComboBox: Updating ComboBox with 
components


(lazarus:3564): GLib-GObject-WARNING **: gsignal.c:1207: no emission 
of signal "button-release-event" to stop for instance '0x3b8fa90'


(lazarus:3564): GLib-GObject-WARNING **: gsignal.c:1207: no emission 
of signal "button-release-event" to stop for instance '0x3b8fa90'


(lazarus:3564): GLib-GObject-WARNING **: gsignal.c:1207: no emission 
of signal "button-release-event" to stop for instance '0x3b8fa90'

TApplication.HandleException Access violation
  Stack trace:
  $005A150D line 5745 of include/control.inc
  $009105AC line 2254 of idewindowintf.pas
  $004B5A51 line 5916 of main.pp
  $009B9C91 line 565 of componentpalette.pas
  $005D9C4C line 83 of include/menuitem.inc
  $005DA528 line 293 of include/menuitem.inc
  $00432E0F
  $00655421 line 3705 of gtk2/gtk2proc.inc
  $007D09F6 line 139 of gtk2/gtk2wsmenus.pp
  $7F5F99D5EC5D
TObjectInspectorDlg.FillPersistentComboBox: Updating ComboBox with 
components

LAZARUS END - cleaning up ...
Hint: (lazarus) [TMainIDE.Destroy] B  -> inherited Destroy... TMainIDE
Hint: (lazarus) [TMainIDE.Destroy] END



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Re: [Lazarus] Lazarus trunk: AV on rightClick on Component-pallette: ShowAll

[john Landmesser via Lazarus]

did a fresh svn download of lazarus

Without own components it is ok but this AV appears again after 
compiling with my extra components?!!




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Re: [Lazarus] Lazarus trunk: AV on rightClick on Component-pallette: ShowAll

[john Landmesser via Lazarus]

Am 08.02.2018 um 21:45 schrieb John Landmesser via Lazarus:

On 08.02.2018 20:58, Juha Manninen via Lazarus wrote:
On Thu, Feb 8, 2018 at 8:51 PM, Juha Manninen 
 wrote:

Can you open the components list with Ctrl-Shift-P ?

I meant Ctrl-Alt-P.

Juha


sam AV if i use the keyboard shortcut



strange:  same AV on Win 10

In Office i tested with Windows XP

Now at home i tested Linux XFCE and Windows 10

So there are two different hardware configuration with same AV error.

I have fpc 3.02 and 3.0.4 !?
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Re: [Lazarus] Lazarus trunk: AV on rightClick on Component-pallette: ShowAll

[John Landmesser via Lazarus]

On 08.02.2018 20:58, Juha Manninen via Lazarus wrote:

On Thu, Feb 8, 2018 at 8:51 PM, Juha Manninen  wrote:

Can you open the components list with Ctrl-Shift-P ?

I meant Ctrl-Alt-P.

Juha


sam AV if i use the keyboard shortcut

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Re: [Lazarus] Lazarus trunk: AV on rightClick on Component-pallette: ShowAll

[John Landmesser via Lazarus]

On 08.02.2018 20:58, Juha Manninen via Lazarus wrote:

On Thu, Feb 8, 2018 at 8:51 PM, Juha Manninen  wrote:

Can you open the components list with Ctrl-Shift-P ?

I meant Ctrl-Alt-P.

Juha


Ctrl-Alt-P

is already defined on my Linux XFCE

Have to learn how to redefine it in Lazarus

Same issue for Windows XP Lazarus trunk!
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Re: [Lazarus] High-DPI TImageList

[Ondrej Pokorny via Lazarus]

First of all, the image list became multi-resolution. You have the new 
class TCustomImageListResolution that is the new "TCustomImageList". You 
have to move your custom code there.


On 08.02.2018 16:02, lainz via Lazarus wrote:

Hi, I have a component BGRAImageList that fixes basically the alpha channels
of the regular ImageList on Linux using BGRABitmap.

I did not code that component, but I'm the one that updates the package.

Sources:
https://github.com/bgrabitmap/bgracontrols/blob/master/bgraimagelist.pas

It works fine in 1.8, but in trunk there are changes like:

1.8
TCustomImageList = class(TLCLReferenceComponent)

1.9 is TCustomImageList = class(TLCLComponent), so the method
ReferenceNeeded is not available.

Questions:
- *What does ReferenceNeeded, and if it is necessary on 1.9*.


On win32 you need a handle for WinAPI native controls. The real 
imagelist code (along with ReferenceNeeded method) was moved into 
TCustomImageListResolution.


You have to move all your code into a TCustomImageListResolution 
descendant and register it in TCustomImageList.GetResolutionClass.



Another is this:

1.8
procedure Draw(ACanvas: TCanvas; AX, AY, AIndex: Integer; ADrawingStyle:
TDrawingStyle; AImageType: TImageType;
   ADrawEffect: TGraphicsDrawEffect); overload; virtual;

1.9
procedure Draw(ACanvas: TCanvas; AX, AY, AIndex: Integer; ADrawingStyle:
TDrawingStyle; AImageType: TImageType;
   ADrawEffect: TGraphicsDrawEffect); overload;

In 1.9 the virtual was removed and I can't use override anymore.


Again, override TCustomImageListResolution.Draw


My question is *if the method still will be called instead of the LCL one in
1.9 without using override*. I know this is a basic of OOP but I need a bit
of help because I never use virtual and overload.


Override TCustomImageListResolution.Draw


Another question: If I remove override to compile in 1.9, what happens in
1.8?


The new image list from 1.9 is not compatible with 1.8. You have to 
release a new version for 1.9+ only.



I never use IFDEF LCL_FULLVERSION and don't know how to use it, any chances
to have 2 different methods, one with override and other without, one for
1.8 and one for 1.9 or newer?

And the big question:

*Transparency is now or will be fixed on linux, so I don't need this
component anymore and I can archive it?*


I didn't change anything about transparency but for me transparency 
works fine on both Gtk2 and Qt Linux. (I don't know any other details.)


Ondrej
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Re: [Lazarus] Lazarus trunk: AV on rightClick on Component-pallette: ShowAll

[Juha Manninen via Lazarus]

On Thu, Feb 8, 2018 at 8:51 PM, Juha Manninen  wrote:
> Can you open the components list with Ctrl-Shift-P ?

I meant Ctrl-Alt-P.

Juha
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Re: [Lazarus] High-DPI TImageList

[Juha Manninen via Lazarus]

On Thu, Feb 8, 2018 at 5:02 PM, lainz via Lazarus
 wrote:
> 1.8
> TCustomImageList = class(TLCLReferenceComponent)
>
> 1.9 is TCustomImageList = class(TLCLComponent), so the method
> ReferenceNeeded is not available.
>
> Questions:
> - *What does ReferenceNeeded, and if it is necessary on 1.9*.

TLCLReferenceComponent has a handle.
I have no idea why an ImageList would need a handle.
I noticed there is now:
  TCustomImageListResolution = class(TLCLReferenceComponent)
Maybe Ondrej can explain why it is there.

Juha
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Re: [Lazarus] High-DPI TImageList

[Leandro Diaz via Lazarus]

Ok Juha thanks.

And what about the ifdef for that missing method? ReferenceNeeded

Sent from Mailspring 
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On feb. 8 2018, at 3:59 pm, Juha Manninen via Lazarus 
 wrote:
>
> On Thu, Feb 8, 2018 at 5:02 PM, lainz via Lazarus
>  wrote:
> > My question is *if the method still will be called instead of the LCL one in
> > 1.9 without using override*. I know this is a basic of OOP but I need a bit
> > of help because I never use virtual and overload.
>
>
> Virtual methods are polymorphic so a caller does not need to know the
> actual type of an object. The correct virtual / overridden method is
> always called.
> I guess your code knows the exact type (BGRAImageList) and can use it.
> Thus the correct method is called even if it is not virtual.
>
> Juha
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Re: [Lazarus] High-DPI TImageList

[Juha Manninen via Lazarus]

On Thu, Feb 8, 2018 at 5:02 PM, lainz via Lazarus
 wrote:
> My question is *if the method still will be called instead of the LCL one in
> 1.9 without using override*. I know this is a basic of OOP but I need a bit
> of help because I never use virtual and overload.

Virtual methods are polymorphic so a caller does not need to know the
actual type of an object. The correct virtual / overridden method is
always called.
I guess your code knows the exact type (BGRAImageList) and can use it.
Thus the correct method is called even if it is not virtual.

Juha
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Re: [Lazarus] Lazarus trunk: AV on rightClick on Component-pallette: ShowAll

[Juha Manninen via Lazarus]

On Thu, Feb 8, 2018 at 6:48 PM, John Landmesser via Lazarus
 wrote:
> bug report done
> https://bugs.freepascal.org/view.php?id=33139

Ah, I was just planning to write that I cannot reproduce. Works well here.
Can you open the components list with Ctrl-Shift-P ?
Can anybody else reproduce?

> Lazarus 1.9.0 "today" FPC 3.0.4 i386-win32-win32/win64

Your report says GTK2 / Linux. I also tested on both Linux and Windows.

Juha
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Re: [Lazarus] Lazarus trunk: AV on rightClick on Component-pallette: ShowAll

[John Landmesser via Lazarus]

On 08.02.2018 12:57, Landmesser John via Lazarus wrote:

do i have to write a bug report?


Lazarus 1.9.0 "today" FPC 3.0.4 i386-win32-win32/win64


bug report done

https://bugs.freepascal.org/view.php?id=33139

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Re: [Lazarus] Show crash info to user (MadExcept)

[Michael Van Canneyt via Lazarus]

On Thu, 8 Feb 2018, AlexeyT via Lazarus wrote:


Hi

In Delphi i used lib MadExcept. I need similar lib in Laz too. To show 
to user reason of crash- src filename, line number, stack


How to do it?


Hook into the various exception handling routines, and use routines 
similar to the ones found in heaptrc. The lazarus IDE also contains some

nice examples of logging when an exception occurs.

Michael.
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Re: [Lazarus] High-DPI TImageList

[lainz via Lazarus]

Hi, I have a component BGRAImageList that fixes basically the alpha channels
of the regular ImageList on Linux using BGRABitmap.

I did not code that component, but I'm the one that updates the package.

Sources:
https://github.com/bgrabitmap/bgracontrols/blob/master/bgraimagelist.pas

It works fine in 1.8, but in trunk there are changes like:

1.8
TCustomImageList = class(TLCLReferenceComponent)

1.9 is TCustomImageList = class(TLCLComponent), so the method
ReferenceNeeded is not available.

Questions:
- *What does ReferenceNeeded, and if it is necessary on 1.9*.

Another is this:

1.8
procedure Draw(ACanvas: TCanvas; AX, AY, AIndex: Integer; ADrawingStyle:
TDrawingStyle; AImageType: TImageType;
  ADrawEffect: TGraphicsDrawEffect); overload; virtual;

1.9
procedure Draw(ACanvas: TCanvas; AX, AY, AIndex: Integer; ADrawingStyle:
TDrawingStyle; AImageType: TImageType;
  ADrawEffect: TGraphicsDrawEffect); overload;

In 1.9 the virtual was removed and I can't use override anymore.

My question is *if the method still will be called instead of the LCL one in
1.9 without using override*. I know this is a basic of OOP but I need a bit
of help because I never use virtual and overload.

Another question: If I remove override to compile in 1.9, what happens in
1.8?

I never use IFDEF LCL_FULLVERSION and don't know how to use it, any chances
to have 2 different methods, one with override and other without, one for
1.8 and one for 1.9 or newer?

And the big question:

*Transparency is now or will be fixed on linux, so I don't need this
component anymore and I can archive it?*



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[Lazarus] Show crash info to user (MadExcept)

[AlexeyT via Lazarus]

Hi

In Delphi i used lib MadExcept. I need similar lib in Laz too. To show 
to user reason of crash- src filename, line number, stack


How to do it?

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[Lazarus] Lazarus trunk: AV on rightClick on Component-pallette: ShowAll

[Landmesser John via Lazarus]

do i have to write a bug report?


Lazarus 1.9.0 "today" FPC 3.0.4 i386-win32-win32/win64

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