How to use SVG
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Which version of Qt are you currently using ?
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Hi
it should work unless really old Qt.Could you try in build menu to use Clean all, run qmake and then press the run ?
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wrote on 2 Jul 2021, 16:27 last edited by Saviz 7 Feb 2021, 16:34
Qt version 4.14.2 (That is what it says in the "About")
I don't understand something, I just recently downloaded Qt. When I downloaded Qt I selected the Qt 6 version but now as you told me to look at the version it says 4.14,2. What is going on I am very confused. Did I make a mistake in the download process?
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No that's the Qt Creator version. There's no Qt 4.14.
You have to take a look at the kit you are using.
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No that's the Qt Creator version. There's no Qt 4.14.
You have to take a look at the kit you are using.
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wrote on 2 Jul 2021, 17:07 last edited by JoeCFD 7 Feb 2021, 17:16
It was introduced from 4.1.
https://doc.qt.io/qt-5/qsvgwidget.html
QT += core gui widgets svg <=== you need widgets as well for qsvgwidgetIf you simply need a QPixmap from a svg source for other widgets, use QSvgRenderer to paint one.
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Hi
it should work unless really old Qt.Could you try in build menu to use Clean all, run qmake and then press the run ?
wrote on 2 Jul 2021, 17:30 last edited by Saviz 7 Feb 2021, 17:30I tried doing what you suggested. Unfortunately it didn't work.
I first cleaned the project and then ran qmake but I still get the same errors.
Maybe I am doing something else wrong? (Like not including something?) -
I tried doing what you suggested. Unfortunately it didn't work.
I first cleaned the project and then ran qmake but I still get the same errors.
Maybe I am doing something else wrong? (Like not including something?) -
Drop the C++ CONFIG, you do not need that currently.
You should also consider updating to the latest Qt 6.1.
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wrote on 2 Jul 2021, 18:14 last edited by JoeCFD 7 Feb 2021, 18:29
@Saviz Another possibility is svg is not installed. Run MaintenaceTool to add it. I just installed Qt 6.1.2 in which svg is included. If you can find it in the Qt lib dir, check the path settings for Qt.
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@Saviz CONFIG += c++17 you also need 17 for Qt 6.
Show this line of your Makefile:
LIBS = $(SUBLIBS)
it should have -lQt5Svg -
@Saviz Another possibility is svg is not installed. Run MaintenaceTool to add it. I just installed Qt 6.1.2 in which svg is included. If you can find it in the Qt lib dir, check the path settings for Qt.
wrote on 3 Jul 2021, 05:03 last edited by@JoeCFD said in How to use SVG:
MaintenaceTool
If I want to only install the SVG components, then what component do I have to select in the MaintenaceTool to install?
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@JoeCFD said in How to use SVG:
MaintenaceTool
If I want to only install the SVG components, then what component do I have to select in the MaintenaceTool to install?
Lifetime Qt Championwrote on 3 Jul 2021, 05:12 last edited by mrjj 7 Mar 2021, 05:13 -
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I will give it a try. But my speed is not the best. It may take a while to download the new version. But I will report back how it went. Thank you all for your help
Hi
Else a sure bet is installing Qt5.15.
While v6 does offer new things
https://wiki.qt.io/New_Features_in_Qt_6.0
Its mostly if you are using QML and it still has lots of features missing planned
for some later releases. -
Hi
Else a sure bet is installing Qt5.15.
While v6 does offer new things
https://wiki.qt.io/New_Features_in_Qt_6.0
Its mostly if you are using QML and it still has lots of features missing planned
for some later releases. -
Okay, I will try it. By the way I have one last question. Why isn't there a widget for SVG in QT Designer by default?
- Why isn't there a widget for SVG in QT Designer by default?
Too much work I would guess. To allow a Widget to be used in design time, a plugin must be made and maintained across many Designers.
And QSvgWidget doesn't have any properties to set at Design time. (besides the svg file) so I gues sit was
not worth the effort.You can use the Producer Promote feature to allow a Qwidget as a place holder in Designer and then app is run its
the SVG one. -
- Why isn't there a widget for SVG in QT Designer by default?
Too much work I would guess. To allow a Widget to be used in design time, a plugin must be made and maintained across many Designers.
And QSvgWidget doesn't have any properties to set at Design time. (besides the svg file) so I gues sit was
not worth the effort.You can use the Producer Promote feature to allow a Qwidget as a place holder in Designer and then app is run its
the SVG one. -
Very interesting. Is there a documentation that I can use for the Producer Promote feature so I can learn it?
Lifetime Qt Championwrote on 3 Jul 2021, 12:31 last edited by mrjj 7 Mar 2021, 12:32Hi
Its very handy.In your use case you place a QWidget on the form, right-click and choose to promote.
Then tell it QSvgWidget for class name and it will guess on QSvgWidget.h
Then press Add (+), then then promote.https://doc.qt.io/qt-5/designer-using-custom-widgets.html
Do note:
Accessing it via Ui-> is possible and you can call the real functions from code, just like any other widget. -
Hi
Its very handy.In your use case you place a QWidget on the form, right-click and choose to promote.
Then tell it QSvgWidget for class name and it will guess on QSvgWidget.h
Then press Add (+), then then promote.https://doc.qt.io/qt-5/designer-using-custom-widgets.html
Do note:
Accessing it via Ui-> is possible and you can call the real functions from code, just like any other widget.wrote on 3 Jul 2021, 12:56 last edited by Saviz 7 Mar 2021, 12:57So, if I want to create a custom widget for SVG, how can I do that? Is there an example that I can follow for promoting a widget to SVG?
(I ask this because I really want to use SVG as default and I need a solution.)
(I am also a beginner so I have no idea where to start :) )
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