Drag a QFileSystemModel item and drop it into Windows Desktop
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You are trying to drag from the model to somewhere else or from somewhere else to the model?
If the second is true you need to also reimplement the 2 methods:
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You are trying to drag from the model to somewhere else or from somewhere else to the model?
If the second is true you need to also reimplement the 2 methods:
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Then it's not clear what you are trying to do.
I think you have some confusion in mind on what the mime data and types are vs what file association is.Could you describe a little bit more in detail where you are dragging this data to and what would you like to happen when dropped?
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Then it's not clear what you are trying to do.
I think you have some confusion in mind on what the mime data and types are vs what file association is.Could you describe a little bit more in detail where you are dragging this data to and what would you like to happen when dropped?
@VRonin What I would like to do is the following: I have a Qt Application which shows the content of a local directory.
I want to take a file shown in the view, drag it outside the application, and drop it, for instance, on the Windows File Explorer or the Desktop.
Say that the root of the QFileSystemModel isC:\Users\Admin\Desktop\test
and I want the drop site being:
C:\Users\Admin\Desktop
and the drop file being:
myFile.myType
Once it is dropped, I want the program associated being launched automatically, opening that file.
That's the reason why I need the mime type, but I do not know how this information is treated when a Qt application interacts with Windows environment . More in general, I do not know how a Qt application interacts with Windows environment.
I would like to proceed step by step, and this justifies the incomplete question I made. -
@VRonin What I would like to do is the following: I have a Qt Application which shows the content of a local directory.
I want to take a file shown in the view, drag it outside the application, and drop it, for instance, on the Windows File Explorer or the Desktop.
Say that the root of the QFileSystemModel isC:\Users\Admin\Desktop\test
and I want the drop site being:
C:\Users\Admin\Desktop
and the drop file being:
myFile.myType
Once it is dropped, I want the program associated being launched automatically, opening that file.
That's the reason why I need the mime type, but I do not know how this information is treated when a Qt application interacts with Windows environment . More in general, I do not know how a Qt application interacts with Windows environment.
I would like to proceed step by step, and this justifies the incomplete question I made.Once it is dropped, I want the program associated being launched automatically, opening that file.
That's the reason why I need the mime typeI don't know about the drag/drop part, but why do you need the mime type to cause the associated application to open on the end file? That's what the Windows OS "shell open" does for you?
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@VRonin What I would like to do is the following: I have a Qt Application which shows the content of a local directory.
I want to take a file shown in the view, drag it outside the application, and drop it, for instance, on the Windows File Explorer or the Desktop.
Say that the root of the QFileSystemModel isC:\Users\Admin\Desktop\test
and I want the drop site being:
C:\Users\Admin\Desktop
and the drop file being:
myFile.myType
Once it is dropped, I want the program associated being launched automatically, opening that file.
That's the reason why I need the mime type, but I do not know how this information is treated when a Qt application interacts with Windows environment . More in general, I do not know how a Qt application interacts with Windows environment.
I would like to proceed step by step, and this justifies the incomplete question I made.@franc said in Drag a QFileSystemModel item and drop it into Windows Desktop:
That's the reason why I need the mime type
Nope that's wrong. You are trying to move a file so the mime type must be compatible with it. The event is not managed by the sender application but by the receiving object (the file explorer in your case) if it doesn't recognise the mime type then it will not accept the drop because it doesn't know what to do with it.
All you can do is to call
QDesktopServices::openUrlonce the drop is completed -
Once it is dropped, I want the program associated being launched automatically, opening that file.
That's the reason why I need the mime typeI don't know about the drag/drop part, but why do you need the mime type to cause the associated application to open on the end file? That's what the Windows OS "shell open" does for you?
@JonB Thanks for the question. That's because the file myFile.myType should be opened with a specific handler application (say myApplication), which detects the mime application/myType.
Summing up, I have four ingredients:
- a Qt Application which shows a directory in its central widget;
- a custom mime, application/myType, already contained in the Windows Register;
- a custom format, myFyle.myType;
- a second application, myApplication, which is registered as handler of the type myType.
I want to pick myFile.myType from the Qt Application TreeView, drag it outside the Qt Application, drop it on Windows File Explorer, and once it is dropped, launching myApplication to open myFile.myType.
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@franc said in Drag a QFileSystemModel item and drop it into Windows Desktop:
That's the reason why I need the mime type
Nope that's wrong. You are trying to move a file so the mime type must be compatible with it. The event is not managed by the sender application but by the receiving object (the file explorer in your case) if it doesn't recognise the mime type then it will not accept the drop because it doesn't know what to do with it.
All you can do is to call
QDesktopServices::openUrlonce the drop is completed -
@JonB Thanks for the question. That's because the file myFile.myType should be opened with a specific handler application (say myApplication), which detects the mime application/myType.
Summing up, I have four ingredients:
- a Qt Application which shows a directory in its central widget;
- a custom mime, application/myType, already contained in the Windows Register;
- a custom format, myFyle.myType;
- a second application, myApplication, which is registered as handler of the type myType.
I want to pick myFile.myType from the Qt Application TreeView, drag it outside the Qt Application, drop it on Windows File Explorer, and once it is dropped, launching myApplication to open myFile.myType.
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@VRonin Sorry for the incoming out of topic: the File Manager should be able to recognize the mime type once I have added it on the Register, shouldn't it?
I thank you for the reference.
@franc said in Drag a QFileSystemModel item and drop it into Windows Desktop:
File Manager should be able to recognize the mime type once I have added it on the Register, shouldn't it?
@VRonin said in Drag a QFileSystemModel item and drop it into Windows Desktop:
I think you have some confusion in mind on what the mime data and types are vs what file association is.
The mime type is not the file extension. The mime type
text/uri-listis recognised by the file system as a list of files that it can copy/move/create a link to.
