Hi,

I was told to give feedback on my usage of LCL-Qt, so here goes. I simply recompiled Lazarus IDE with LCL-Qt.

I downloaded and used bin-qt4pas-V1.72_Qt4.5.2.tar.gz for the qt4intf library. Using Ubuntu 9.04 (32-bit) and Lazarus 0.9.29 (svn updated from 2010-02-05).

* Source Editor window keeps jumping. It jumps to the top left corner of the screen after opening every project.

* Toolbar buttons with down arrow for dropdown menu. The down arrow is not drawn. See attached screenshot.

* Treeview component doesn't point the + symbol to indicate that the node can be expanded. It draws an empty rectangle. See attached screenshot.

I'll continue using it for the coming week and report further progress. At least the edit cursor issue (always painted it as black) is now fixed.

* IDE now doesn't detect when a file is changed by an external program. I don't get prompted by the IDE to reload the file. To make sure this is not a general IDE issue, I recompiled my IDE with GTK2 (same revision as I used for IDE+Qt4 widgetset). Using the IDE+GTK2, the IDE detects the file changed and prompts to reload it. So this is a issue specific to IDE+Qt widgetset.

ok, but what's qt version on that ubuntu ? I suppose 4.5.0 ... which is pretty buggy.

* Source Editor window keeps jumping. It jumps to the top left corner of the screen after opening every project.

Never seen such problem , using laz everyday, tested on all fedoras and there's no "jumping"

* Toolbar buttons with down arrow for dropdown menu. The down arrow is not drawn. See attached screenshot.

no screenshoot, but also I don't have such arrow on dropdown menu , so must recompile into gtk2 to see what have to be there :)

* Treeview component doesn't point the + symbol to indicate that the node can be expanded. It draws an empty rectangle. See attached screenshot.

some themes does not draw + symbol on linux (eg. windows theme), dunno why, problem is inside qt probably (QStylePainter), I'm using plastique with kde-3.5 and there everything looks ok, also with oxygen theme it looks correct.

Where are attachments ?

I'll continue using it for the coming week and report further progress. At least the edit cursor issue (always painted it as black) is now fixed.

Thanks.

zeljko wrote

ok, but what's qt version on that ubuntu ? I suppose 4.5.0 ... which is pretty buggy.

libqt-core 4.5.0-ubuntu4.3

That's Ubuntu 9.04 with all latest OS updates from Ubuntu.

no screenshoot, but also I don't have such arrow on dropdown menu , so must recompile into gtk2 to see what have to be there :)

Sorry, I forgot the screenshots. I attached my IDE+GTK2 as well so you can compare the difference.

Also note that under LCL-GTK2 the toolbar button doesn't look like a button - it's flat. Under LCL-Qt it looks pretty ugly.

some themes does not draw + symbol on linux (eg. windows theme), dunno why, problem is inside qt probably (QStylePainter), I'm using plastique with

Nope, it's a LCL-Qt4 specific bug. I installed Qt UI Designer and the treeview nodes are painted correctly. Qt Designer used the theme (whatever it is) as Lazarus IDE with LCL-Qt did. See screenshot in separate message (previous attempt was over the 40KB message size).

Attached is the screenshot of Qt Designer - showing the treeview nodes painted correctly.

yes, not only on qt, look at
http://bugs.freepascal.org/view.php?id=15331

Here is another screenshot of Qt Designer showing that it is not an issue with my Qt theme. In Qt Designer the toolbar downarrows are drawn correctly (and they are flat buttons), but not in Lazarus IDE.

Graeme Geldenhuys wrote

Here is another screenshot of Qt Designer showing that it is not an issue with my Qt theme. In Qt Designer the toolbar downarrows are drawn correctly (and they are flat buttons), but not in Lazarus IDE.

Toolbar in Qt Designer is native QToolBar class, but in LCL we use LCL one, not native Qt class, so there could be the reason, why down arrow isn't painted.I'm currently trying to fix it.

z.

A font issue:

With IDE + LCL-GTK2 I use Source Editor with font "DejaVu Sans Mono" with Size 10 font, but in IDE + LCL-Qt the font size was much smaller, so I had to change the Source Editor font to DejaVu Sans Mono" with Size 11 font so that the text looked the same size as under LCL-GTK2. This was only an issue in the Source Editor window.

zeljko wrote

Toolbar in Qt Designer is native QToolBar class, but in LCL we use LCL one, not native Qt class, so there could be the reason,

Why the exception to the rule? Isn't the whole idea of LCL to wrap native widget components and not use custom drawn ones?

We had some problems with native toolbar in the beginning, so decided to leave it to LCL for now. (no time to retest and try to implement native one at the moment).

zeljko

For me gtk2 have too big fonts :) When I compare font with size 11 with qt3 than it's same. Try to compare font with size 11 with some kde app (eg. kwrite).

btw. in source editor there's no font size , but font height which is different than size.

Here too, as of laz r 23655 :)

Graeme Geldenhuys wrote

Why the exception to the rule? Isn't the whole idea of LCL to wrap native widget components and not use custom drawn ones?

Every rule has an exception. This statement too.

Best regards,
Paul Ishenin.

I has this font issue, too. Font height 10 is good for GTK2 and height 12 is good for QT. The difference on screen looks much bigger than 20%.

It is easy to change but still I wonder how can they measure the heights so differently.

Juha Manninen

AFAIK, gtk2 have font sizes problem not qt.I'm comparing qt fonts with sizes from qtconfig4, also if I can correctly remember , gtk doesn't have such problem (font sizes were ok).

Juha Manninen wrote

It is easy to change but still I wonder how can they measure the heights so differently.

My thought too. The only thing I can think of is in my Gnome setup (global desktop settings), the DPI is forced to 96. Yet my X Window system reports the dpi otherwise, at 89 DPI.

$ xdpyinfo | grep resolution
  resolution:    89x87 dots per inch

I don't run KDE or any other Qt applications, so I don't know where you setup the "custom" DPI setting for Qt based applications. Or maybe Qt looks at the X11 dpi setting.

No to figure out the mission of forcing the whole X11 to 96 DPI, so I can test again to see if that explains the reason for the difference in Lazarus source editor.

yes, not only on qt, look at http://bugs.freepascal.org/view.php?id=15331

I think it was only a QT issue but I reported it little wrong first. Your fix was late last year, r23129, and it still works for me.

Juha M.

Hi,
I have OpenSuse 11.2 and KDE4.3.4.

* Source Editor window keeps jumping. It jumps to the top left corner of the screen after opening every project.

No jumping here.

* Toolbar buttons with down arrow for dropdown menu. The down arrow is not drawn.

It is drawn correctly for me.

* Treeview component doesn't point the + symbol to indicate that the node can be expanded. It draws an empty rectangle.

Ok, I also have some issue with this. I think the symbol is so small I can hardly see it. It works when clicked though.

Regards,
Juha Manninen

That was the problem! Forcing X11 to 96dpi (same as Gnome desktop settings), both Lazarus (Qt | GTK2) now have the same font size in the Source Editor screen - using the same editor font settings. :-)

I can make a screencast to prove it. :-) The Source Editor window jumps to position (0,0) whenever I use "Project > Open recent project" or "Project > Open Project".

Functionality is still fine, it simply doesn't draw the + symbol in the small rectangle.

Graeme Geldenhuys wrote

Functionality is still fine, it simply doesn't draw the + symbol in the small rectangle.

Yes, it does ... check r 23656

zeljko

Hi Zeljko,
Here disabled toolbuttons in the IDE have a border (look like buttons) while enabled ones are flat.
Need a screenshot?

Cheers
Theo

theo wrote

Hi Zeljko, Here disabled toolbuttons in the IDE have a border (look like buttons) while enabled ones are flat. Need a screenshot?

No, I see that, fight with it currently, but got strange results when drawing normal button via QStyleCC_ToolButton, there's always an arrow on button, no matter what I set.
But in this case (via QStyleCC_ToolButton) borders are ok.

zeljko

theo wrote

Hi Zeljko, Here disabled toolbuttons in the IDE have a border (look like buttons) while enabled ones are flat. Need a screenshot?

Fixed, r 23658

zeljko

Fixed, r 23658 zeljko

Cool, it works.
Thank you.

Seem that xpde still alive ? ;)

Seem that xpde still alive ? ;)

Hehe! I'd say undead ;-)
*Jos? Le?n was busy with *Delphi for PHP
But our faces are still there http://www.xpde.com/team.php

hmmm...maybe it's time to revamp it with qtlcl :)

hmmm...maybe it's time to revamp it with qtlcl :)

Feel free! ;-)
You know better if it's possible and how much effort it would take.

Cheers Theo

theo wrote

> hmmm...maybe it's time to revamp it with qtlcl :) Feel free! ;-) You know better if it's possible and how much effort it would take.

Of course it's possible, also I think that there isn't needed to much effort to get it work, and then continue to work on it.
Well ... maybe don't know yet, but if I have more free time in next few months, I'll try that definitelly :)

zeljko

zeljko wrote

> *Jos? Le?n ?was busy with *Delphi for PHP > But our faces are still there http://www.xpde.com/team.php hmmm...maybe it's time to revamp it with qtlcl :)

I was actually looking at xpde about three months ago and thought of revamping it using fpGUI. :) Maybe not every single screen, but at least the window manager and taskbar design.

Thanks zeljko for all the fixes. I'm updating my Lazarus now to try it out at work.

Regards,
- Graeme -

Graeme Geldenhuys wrote

Thanks zeljko for all the fixes. I'm updating my Lazarus now to try it out at work.

Hope that it works ok for you now.

zeljko