Hello,
I'm working on a program that reads in a text file and puts data into a QStandardItemModel attached to a QTableView. If a particular word appears in a line of text read from the file, the program will put an "X" icon in the vertical header for that particular row. I'm having a problem with this X appearing in a QSortFilterProxyModel.
Everything works fine in standard form. However, I'm implementing filtering capability on the tableview with a 2 QLineEdit input fields above the table. I connect the two lineEdits to a filterChanged() slot and I reimplemented QSortFilterProxyModel as follows:
mysortfilterproxymodel.h:
#ifndef MYSORTFILTERPROXYMODEL_H
#define MYSORTFILTERPROXYMODEL_H
#include <QSortFilterProxyModel>
{
Q_OBJECT
public:
explicit MySortFilterProxyModel
(QObject *parent
= 0);
QVariant headerData
(int section, Qt
::Orientation orientation,
int role
=Qt
::DisplayRole) const;
protected:
bool filterAcceptsRow
(int sourceRow,
const QModelIndex &sourceParent
) const;
};
#endif // MYSORTFILTERPROXYMODEL_H
#ifndef MYSORTFILTERPROXYMODEL_H
#define MYSORTFILTERPROXYMODEL_H
#include <QSortFilterProxyModel>
class MySortFilterProxyModel : public QSortFilterProxyModel
{
Q_OBJECT
public:
explicit MySortFilterProxyModel(QObject *parent = 0);
QVariant headerData(int section, Qt::Orientation orientation, int role=Qt::DisplayRole) const;
protected:
bool filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent) const;
};
#endif // MYSORTFILTERPROXYMODEL_H
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mysortfilterproxymodel.cpp:
#include "mysortfilterproxymodel.h"
#include <QIcon>
MySortFilterProxyModel
::MtSortFilterProxyModel(QObject *parent
) :{
}
bool MySortFilterProxyModel::filterAcceptsRow(int sourceRow,
{
QModelIndex index0
= sourceModel
()->index
(sourceRow,
0, sourceParent
);
QModelIndex index1
= sourceModel
()->index
(sourceRow,
1, sourceParent
);
//filtering on 2 columns
QString filt1
= filterRegExp
().
pattern().
section("|",
0,
0);
QString filt2
= filterRegExp
().
pattern().
section("|",
1,
1);
return (sourceModel()->data(index0).toString().contains(f1)
&& sourceModel()->data(index1).toString().contains(f2));
}
QVariant MySortFilterProxyModel
::headerData(int section, Qt
::Orientation orientation,
int role
) const {
if (orientation == Qt::Vertical){
if (role == Qt::DecorationRole)
return QIcon(":MyProgram/images/x.png");
}
}
#include "mysortfilterproxymodel.h"
#include <QIcon>
MySortFilterProxyModel::MtSortFilterProxyModel(QObject *parent) :
QSortFilterProxyModel(parent)
{
}
bool MySortFilterProxyModel::filterAcceptsRow(int sourceRow,
const QModelIndex &sourceParent) const
{
QModelIndex index0 = sourceModel()->index(sourceRow, 0, sourceParent);
QModelIndex index1 = sourceModel()->index(sourceRow, 1, sourceParent);
//filtering on 2 columns
QString filt1 = filterRegExp().pattern().section("|",0,0);
QString filt2 = filterRegExp().pattern().section("|",1,1);
QRegExp f1(filt1);
QRegExp f2(filt2);
return (sourceModel()->data(index0).toString().contains(f1)
&& sourceModel()->data(index1).toString().contains(f2));
}
QVariant MySortFilterProxyModel::headerData(int section, Qt::Orientation orientation, int role) const
{
if (orientation == Qt::Vertical){
if (role == Qt::DecorationRole)
return QIcon(":MyProgram/images/x.png");
return QSortFilterProxyModel::headerData(section, orientation, role);
}
return QSortFilterProxyModel::headerData(section, orientation, role);
}
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My filterChanged() slot is as follows:
void MainWindow
::filterChanged(const QString &filt
) {
filt1 = ui->colOneFilterLineEdit->text();
filt2 = ui->colTwoFilterLineEdit->text();
toFilt = filt1 + "|" + filt2;
myProxyModel->setFilterFixedString(toFilt);
}
void MainWindow::filterChanged(const QString &filt)
{
QString toFilt = filt;
QString filt1, filt2= "";
filt1 = ui->colOneFilterLineEdit->text();
filt2 = ui->colTwoFilterLineEdit->text();
toFilt = filt1 + "|" + filt2;
myProxyModel->setFilterFixedString(toFilt);
}
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Here is the model setup and the line of code that detects the particular word and then places the X in the vertical header:
parseModel ->setHeaderData(0, Qt::Horizontal, "Direction");
parseModel ->setHeaderData(1, Qt::Horizontal, "Street");
//filtering proxy model for parsing table model
proxyModel = new MySortFilterProxyModel;
proxyModel->setSourceModel(parseModel);
// ... Code to read in file line by line and parse each line into the model. If the "word" is found, set wordPresent to true ...
if (wordPresent){
parseModel
->setHeaderData
(row,Qt
::Vertical,
QIcon(":MyProgram/images/x.png"),Qt
::DecorationRole);
}
parseModel = new QStandardItemModel(0, 2, this);
parseModel ->setHeaderData(0, Qt::Horizontal, "Direction");
parseModel ->setHeaderData(1, Qt::Horizontal, "Street");
//filtering proxy model for parsing table model
proxyModel = new MySortFilterProxyModel;
proxyModel->setSourceModel(parseModel);
// ... Code to read in file line by line and parse each line into the model. If the "word" is found, set wordPresent to true ...
if (wordPresent){
parseModel->setHeaderData(row,Qt::Vertical,QIcon(":MyProgram/images/x.png"),Qt::DecorationRole);
}
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The problem I'm having is that the line of code that checks for the particular word and then places an X in the vertical column works fine when there's no QSortFilterProxyModel. That is to say the X shows up fine in the vertical header. Once I attach the proxy model, the X goes away. So I did some Google searches and saw suggestions to implement QSortFilterProxyModel::headerData(), which I tried above. But this winds up placing an X on every single row as well as a row number, so I don't think I'm doing it properly. I also tried returning a QVariant() when no Vertical or DecorationRole was detected in the mysortfilterproxymodel, but that essentially erased the vertical header.
Can anybody help me understand where I'm going wrong and provide a suggestion to right the ship??? Thanks so much!
Can't get Icons in vertical header with QSortFilterProxyModel
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