[this one sucks] Application works only in specific folder, exits silently in another folder

Hedge

Project description:

My qml-desktop-applications uses the "Qt Quick components for Desktop":http://labs.qt.nokia.com/2011/03/10/qml-components-for-desktop/.

I compile all files from the desktop-components into a resource-file (which is embedded in the .exe-file).
The main.qml-file is loaded from the resources like this:

@viewer.setSource(QUrl("qrc:/main.qml"));@

main.qml starts with this line which seems to make trouble:

@import "desktop-components/components"@

Observed behaviour:

When I compile and execute the application everything works fine
When I move my application to another directory (or PC), the application's main window never shows up.
When I remove all desktop-components stuff and just define a simple Rectangle in main.qml it works.
When I load the qml-file (and therefore the desktop-components from the file-system instead of the resource-file it works (viewer.setSource(QUrl("main.qml"));
The problem doesn't occur on OSX

Project file-structure:

Peppy

You have weird problems, Hedge :-O

What it should to do before it ends?

Hedge

Show a window.

Peppy

Is everything okay, no warnings?

Give me code what are you doing before showing the window...

Hedge

By setting message-boxes I could determine that the problem occurs at this line:

@viewer.setSource(QUrl("qrc:/qml/TraktorScrobbler/main.qml"));@

In the project-file I include the qrc-file into the executable:

@# Compile Resources in Binary
RESOURCES +=
resources.qrc@

Peppy

is there that file??

Hedge

yeah it's built and compiled inside the .exe.

EDIT: I tested it in debug-mode. It works in it. Now I have to find out what's the difference between the builds.

Peppy

I don't work with QML but I would like to see more of your code before you start rendering your window...

Hedge

The main.qml looks like this:

@import QtQuick 1.0
import "../../desktop-components/components"

Button {
}
@

When I replaced it with:

@import QtQuick 1.0

Rectangle {
color: "blue"
}
@

It worked. I could execute the application and show the blue rectangle, so there must be something wrong with the desktop-components or styleplugin.dll which it needs.

giesbert

Hi Hedge,

I think, the bug is

@
import "../../desktop-components/components"
@

you tell it to go two dirs up and then to desktop-components/components.
If you put everything into the resource, you should reference the resources, otherwise use the relative path from the executable to that folder...

Hedge

Hello Gerolf,

I did some further testing with your suggestion (changed the file structure).

It is now like:

I also adjusted the import-path in the qml-file to import "desktop-components/components".

My funny find is that it works if I don't use the Qt-resource system:

@viewer.setSource(QUrl("main.qml"));@

As soon as I switch to QMLs resource-system again (QURL("qrc:/main.qml")) the executable hangs as before.

andre

You seem to misunderstand the Qt resource system. You don't need QUrl to work with it. You work with it by using a specially constructed file path, that starts with ":/". Depending on the structure you have applied in your resource file, your file name for the viewer should then be something like ":/main.qml" or ":/qml/main.qml". If you keep all in-qml file names (such as for images and other QML files) relative, you don't need to explicitly reference that a file comes from the resource system anymore.

Hedge

So you mean when I set the source like this:

@viewer.setSource(QUrl("qrc:/main.qml"));@

an

@import "desktop-components/components"@

in main.qml will work?

If that's right then something else must be wrong since that is causing the trouble.

andre

Who ever told you to use that QUrl?

Hedge

setSource requires a QUrl.

Peppy

QString is so beautiful class, isn't it?

andre

[quote author="Hedge" date="1305721995"]setSource requires a QUrl.[/quote]

Sorry, you are right. But you did not read the docs quite well either:

[quote]Ensure that the URL provided is full and correct, in particular, use QUrl::fromLocalFile() when loading a file from the local filesystem.[/quote]

Hedge

Sorry, that I didn't mention this earlier but that is a problem since my qrc-file is compiled into the executable-file by this entry in the .pro-file:

@# Compile Resources in Binary
RESOURCES +=
resources.qrc@

So
@viewer.setSource(QUrl::fromLocalFile(":/main.qml"));@

doesn't work in this case, because it seems to look for a real file.

The error is

@file:///D:/MyProject/:/main.qml: File not found @

andre

Could you show us the contents of your resources.qrc file?

Hedge

Yeah, no problem.

@<RCC>
<qresource prefix="/">
<file>main.qml</file>
<file>images/haken_gruen.gif</file>
<file>images/connected.png</file>
<file>images/not-connected.png</file>
<file>desktop-components/components/plugin/libstyleplugin.a</file>
<file>desktop-components/components/Button.qml</file>
<file>desktop-components/components/ButtonRow.qml</file>
<file>desktop-components/components/CheckBox.qml</file>
<file>desktop-components/components/ChoiceList.qml</file>
<file>desktop-components/components/components.pro</file>
<file>desktop-components/components/ContextMenu.qml</file>
<file>desktop-components/components/Dial.qml</file>
<file>desktop-components/components/Frame.qml</file>
<file>desktop-components/components/GroupBox.qml</file>
<file>desktop-components/components/Makefile</file>
<file>desktop-components/components/ProgressBar.qml</file>
<file>desktop-components/components/qmldir</file>
<file>desktop-components/components/RadioButton.qml</file>
<file>desktop-components/components/ScrollArea.qml</file>
<file>desktop-components/components/ScrollBar.qml</file>
<file>desktop-components/components/Slider.qml</file>
<file>desktop-components/components/SpinBox.qml</file>
<file>desktop-components/components/Switch.qml</file>
<file>desktop-components/components/Tab.qml</file>
<file>desktop-components/components/TabBar.qml</file>
<file>desktop-components/components/TabFrame.qml</file>
<file>desktop-components/components/TableView.qml</file>
<file>desktop-components/components/TextArea.qml</file>
<file>desktop-components/components/TextField.qml</file>
<file>desktop-components/components/ToolBar.qml</file>
<file>desktop-components/components/ToolButton.qml</file>
<file>desktop-components/components/custom/BasicButton.qml</file>
<file>desktop-components/components/custom/Button.qml</file>
<file>desktop-components/components/custom/ButtonColumn.qml</file>
<file>desktop-components/components/custom/ButtonGroup.js</file>
<file>desktop-components/components/custom/ButtonRow.qml</file>
<file>desktop-components/components/custom/CheckBox.qml</file>
<file>desktop-components/components/custom/ChoiceList.qml</file>
<file>desktop-components/components/custom/components.pro</file>
<file>desktop-components/components/custom/GroupBox.qml</file>
<file>desktop-components/components/custom/ProgressBar.qml</file>
<file>desktop-components/components/custom/qmldir</file>
<file>desktop-components/components/custom/Slider.qml</file>
<file>desktop-components/components/custom/SpinBox.qml</file>
<file>desktop-components/components/custom/TextField.qml</file>
<file>desktop-components/components/custom/behaviors/ButtonBehavior.qml</file>
<file>desktop-components/components/custom/behaviors/ModalPopupBehavior.qml</file>
<file>desktop-components/components/custom/private/ChoiceListPopup.qml</file>
</qresource>
</RCC>
@