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Thread: How assign dynamically QPixmap to QML delegate when using QAbstractItemModel in 5.7 ?

  1. #1
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    Default How assign dynamically QPixmap to QML delegate when using QAbstractItemModel in 5.7 ?

    I do have
    Qt Code:
    1. TreeView {
    2. id: view
    3. enabled: !settingsData.allDisabled
    4. TableViewColumn {
    5. title: "Icon"
    6. role: "image"
    7. width: 32
    8. delegate: Image {
    9. height: 20
    10. source: "image://icons/" + id
    11. // source: image
    12. }
    13. }
    14. TableViewColumn {
    15. title: "Name"
    16. role: "display"
    17. resizable: true
    18. visible: true
    19. }
    20. TableViewColumn {
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    And

    Qt Code:
    1. QHash<int, QByteArray> PasswordListModel::roleNames() const {
    2.  
    3. QHash<int, QByteArray> result = QAbstractItemModel::roleNames();
    4. result.insert(ImageRole, QByteArrayLiteral("image"));
    5. result.insert(LastAccessedRole, QByteArrayLiteral("lastAccessed"));
    6. result.insert(LastModifiedRole, QByteArrayLiteral("lastModified"));
    7. result.insert(ContainerIdRole, QByteArrayLiteral("containerId"));
    8. return result;
    9. }
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    and

    Qt Code:
    1. QVariant PasswordListModel::data(const QModelIndex &index, int role) const
    2. {
    3. if (!index.isValid())
    4. return QVariant();
    5.  
    6. .
    7. .
    8. .
    9.  
    10.  
    11. case ImageRole: {
    12. qDebug () << "ImageRole";
    13. // return QVariant(QString("image://icons/password_icon"));
    14. // return QVariant(QString("password_icon"));
    15. return QString ("password_icon");
    16. }
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    How to ImagaProvider will get notification to return correct bitmap for QML side. Based on my debugging, MyClass::requestPixmap(const QString &id, QSize */*size*/, const QSize &requestedSize) will not get request from system.
    Last edited by anda_skoa; 20th July 2016 at 21:27. Reason: changed [qtclass] to [code]

  2. #2
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    Default Re: How assign dynamically QPixmap to QML delegate when using QAbstractItemModel in 5

    Maybe you can start by describing what you have.

    I assume you images are not on disk or anywhere else that is referencable by URL, right?

    How does your application generate them and where/how to you store them in memory?

    Cheers,
    _

  3. #3
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    Default Re: How assign dynamically QPixmap to QML delegate when using QAbstractItemModel in 5

    It's in the disk, QQuickImageProvider derived class will provided them . Model should show correct icon based on type of item which be different in child list. Icons are included in the project.

  4. #4
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    Default Re: How assign dynamically QPixmap to QML delegate when using QAbstractItemModel in 5

    Ok, but if they are on disk, why do you need a custom image provider?

    Just let the model return the file URI. see QUrl::fromLocalFile().

    Cheers,
    _

  5. #5
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    Default Re: How assign dynamically QPixmap to QML delegate when using QAbstractItemModel in 5

    yes, ok. How to assign this URI to delegate in use ?

  6. #6
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    Default Re: How assign dynamically QPixmap to QML delegate when using QAbstractItemModel in 5

    Like any other model data

    Qt Code:
    1. source: styleData.value
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    Cheers,
    _

  7. #7
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    Default Re: How assign dynamically QPixmap to QML delegate when using QAbstractItemModel in 5

    It helped, thanks.

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