How to add tooltip to Tableview from C++ model
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@JonB . I would like to show "This tooltip" (for example) coming from C++ model to QML. But it is not setting tooltip while hovering the table. It displays other table cells without problem.
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@milan
Well let's start by: does it at least output (to debug window/console)data(Invalid Role!)when you move the mouse over an item in the view? -
wrote on 13 Sept 2018, 12:43 last edited by JonB
@milan
Then, assuming you have pasted your code correctly, I don't understand/am very surprised. It would imply to me that Qt is never asking for a tooltip, which seems very odd....Meanwhile you can perhaps address your original question, depending on what you "C++ model" is, via http://doc.qt.io/qt-5/qstandarditem.html#setToolTip . That does not answer to me why you are not presently getting ...
EDIT Hang on! Having said you do not get
data(Invalid Role!)you have just edited your code to change its behaviour on that without saying anything. Why have you done that if you say it was not displaying that message? -
@milan
Then, assuming you have pasted your code correctly, I don't understand/am very surprised. It would imply to me that Qt is never asking for a tooltip, which seems very odd....Meanwhile you can perhaps address your original question, depending on what you "C++ model" is, via http://doc.qt.io/qt-5/qstandarditem.html#setToolTip . That does not answer to me why you are not presently getting ...
EDIT Hang on! Having said you do not get
data(Invalid Role!)you have just edited your code to change its behaviour on that without saying anything. Why have you done that if you say it was not displaying that message?wrote on 13 Sept 2018, 12:46 last edited by@JonB . I edited the code because while pasting the code to qt forum, I missed the break; in case Qt::ToolTipRole:. I am returning the QVariant from the QAbstractTableModel, I do not know how to use QStandardItem in this Model.
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@JonB . I edited the code because while pasting the code to qt forum, I missed the break; in case Qt::ToolTipRole:. I am returning the QVariant from the QAbstractTableModel, I do not know how to use QStandardItem in this Model.
wrote on 13 Sept 2018, 12:55 last edited by@milan
Well it does help if you say you're editing instead of making me look dumb!So:
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Put a
qDebug()into thecase Qt::ToolTipRole:. Does that output? It should do. -
Assuming #1 works, you should be seeing a tooltip of
This tooltip. Do you? You should also change yourQString("This tooltip").arg(index.row())as the format string is wrong for the argument --- or is that too not actually what you have in your code? -
Assuming #2 works, you should now fetch/generate whatever is supposed to be the correct tooltip from the model or wherever you have it to correspond to the specified index.
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@milan
Well it does help if you say you're editing instead of making me look dumb!So:
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Put a
qDebug()into thecase Qt::ToolTipRole:. Does that output? It should do. -
Assuming #1 works, you should be seeing a tooltip of
This tooltip. Do you? You should also change yourQString("This tooltip").arg(index.row())as the format string is wrong for the argument --- or is that too not actually what you have in your code? -
Assuming #2 works, you should now fetch/generate whatever is supposed to be the correct tooltip from the model or wherever you have it to correspond to the specified index.
wrote on 13 Sept 2018, 12:59 last edited by milan@JonB. It was just a mistake I realized later that I missed that line. But, as you suggested, I tried adding qDebug(), but it does not output the qDebug statements too.
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@JonB. It was just a mistake I realized later that I missed that line. But, as you suggested, I tried adding qDebug(), but it does not output the qDebug statements too.
wrote on 13 Sept 2018, 13:15 last edited by@milan
If you are saying it does not hit yourcase Qt::ToolTipRole:in any situation then I am out of ideas. (I assume you have ensured that yourMulModel::data()is hit at all, nothing to do with tooltips, else ....! Now I wonder, can you at least confirm? I'm not a C++-er --- are you supposed to specifyoverridefor your override functions, or does that not matter?)Looking at the code, you print
data(Invalid Role!)and return an emptyQVariantfor every other role. So, for example your view will never return any data to be shown to the user. Maybe in that case the tooltip does not get shown too, I don't know? Make yourQVariant MulModel::data()at least functionable before proceeding. -
@milan
If you are saying it does not hit yourcase Qt::ToolTipRole:in any situation then I am out of ideas. (I assume you have ensured that yourMulModel::data()is hit at all, nothing to do with tooltips, else ....! Now I wonder, can you at least confirm? I'm not a C++-er --- are you supposed to specifyoverridefor your override functions, or does that not matter?)Looking at the code, you print
data(Invalid Role!)and return an emptyQVariantfor every other role. So, for example your view will never return any data to be shown to the user. Maybe in that case the tooltip does not get shown too, I don't know? Make yourQVariant MulModel::data()at least functionable before proceeding.wrote on 13 Sept 2018, 13:18 last edited by milan@JonB . If I add following code to QML, I can also see the tooltip but in last column of the table.
TableViewColumn { role: "toolTip" title: "ToolTipTitle" width: 80 }But this is not what I want, I want the tooltip to be displayed while the mouse gets hovered over table's cells.
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wrote on 13 Sept 2018, 13:24 last edited by
This may be unrelated to your problem, but your string is missing the "%1" for the argument.
ret.setValue(QString("This tooltip").arg(index.row())); -
This may be unrelated to your problem, but your string is missing the "%1" for the argument.
ret.setValue(QString("This tooltip").arg(index.row()));wrote on 13 Sept 2018, 13:26 last edited by@mranger90 . Yes, I copied from other cases. I cannot display "This tooltip" also. But you are right, I missed %1 for arg.
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@mranger90 . Yes, I copied from other cases. I cannot display "This tooltip" also. But you are right, I missed %1 for arg.
wrote on 13 Sept 2018, 13:45 last edited by-
Once and for all, does your function
MulModel::data()get hit at all? Yes or no? -
from the QAbstractTableModel, I do not know how to use QStandardItem in this Model.
Why are you deriving all the way from
QAbstractTableModel? If you started from, say,QStandardItemModelyou would haveQStandardItemand could use itssetTooltip(). I believe standard advice is not to go down toQAbstractTable/Item...if you don't have to, theStandardclasses do a lot of leg work for you.... -
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Once and for all, does your function
MulModel::data()get hit at all? Yes or no? -
from the QAbstractTableModel, I do not know how to use QStandardItem in this Model.
Why are you deriving all the way from
QAbstractTableModel? If you started from, say,QStandardItemModelyou would haveQStandardItemand could use itssetTooltip(). I believe standard advice is not to go down toQAbstractTable/Item...if you don't have to, theStandardclasses do a lot of leg work for you.... -
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I am having difficulty to add tooltip that comes from C++ model in QML. Example from (https://qiita.com/illness072/items/a6f2ce9f7a1bfff44049). The model is defined as follows:
#include <QtDebug> #include "mulmodel.h" MulModel::MulModel(QObject *parent) : QAbstractTableModel(parent) { } int MulModel::rowCount(const QModelIndex & /*parent*/) const { qDebug() << "rowCount() called"; return 5; } int MulModel::columnCount(const QModelIndex & /* parent */) const { qDebug() << "columnCount() called"; return 3; } QHash<int, QByteArray> MulModel::roleNames() const { qDebug() << "roleNames() called"; QHash<int, QByteArray> rn = QAbstractItemModel::roleNames(); rn[RoleFoo] = "foo"; rn[RoleBar] = "bar"; rn[RoleBaz] = "baz"; return rn; } QVariant MulModel::data(const QModelIndex &index, int role) const { QVariant ret = QVariant(); qDebug() << "data() called" << index << role; if (index.isValid()) { switch(role) { case RoleFoo: ret.setValue(QString("Foo%1").arg(index.row())); break; case RoleBar: ret.setValue(QString("Bar%1").arg(index.row())); break; case RoleBaz: ret.setValue(QString("Baz%1").arg(index.row())); break; case Qt::ToolTipRole: ret.setValue(QString("This tooltip%1").arg(index.row())); break; default: qDebug() << "data(Invalid Role!)" << index; break; } } return ret; }#ifndef MULMODEL_H #define MULMODEL_H #include <QAbstractTableModel> #include <QStandardItem> class MulModel : public QAbstractTableModel { Q_OBJECT public: explicit MulModel(QObject *parent = 0); int rowCount(const QModelIndex &parent) const; int columnCount(const QModelIndex &parent) const; QVariant data(const QModelIndex &index, int role) const; QHash<int, QByteArray> roleNames() const; private: enum { RoleFoo = Qt::UserRole + 1, RoleBar = Qt::UserRole + 2, RoleBaz = Qt::UserRole + 3, }; }; #endif // MULMODEL_HTableView { anchors.centerIn: parent anchors.fill: parent model: tableModel TableViewColumn { role: "foo" title: "Foo" width: 80 } TableViewColumn { role: "bar" title: "Bar" width: 80 } TableViewColumn { role: "baz" title: "Baz" width: 80 } }Can somebody help on this.
wrote on 13 Sept 2018, 14:08 last edited by@milan Hi,
You can do it using a delegate and aToolTipcomponent:import QtQuick.Controls 2.2 as QC2 ... TableViewColumn { id: titleColumn title: "Title" role: "title" movable: false resizable: false width: tableView.viewport.width - authorColumn.width delegate: QC2.ItemDelegate{ id: lb hoverEnabled: true text: model.title width: parent.width QC2.ToolTip { delay: 250 parent: lb visible: lb.hovered text: "Tooltip text" //put styleData.tooltip here } } }This code is extracted from the TableView example which I have modified to add the ToolTip.
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