Code for Custom Sort/Filter Model Example
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package com.trolltech.examples;
import com.trolltech.qt.core.*;
import com.trolltech.qt.gui.*;
@QtJambiExample(name = "Custom Filter")
public class CustomFilter extends QWidget {
public static void main(String[] args) {
QApplication.initialize(args);
CustomFilter filter = new CustomFilter();
filter.show();
QApplication.exec();
}
private MySortFilterProxyModel proxyModel;
QGroupBox sourceGroupBox;
QGroupBox proxyGroupBox;
QTreeView sourceView;
QTreeView proxyView;
QCheckBox filterCaseSensitivityCheckBox;
QLabel filterPatternLabel;
QLabel fromLabel;
QLabel toLabel;
QLineEdit filterPatternLineEdit;
QComboBox filterSyntaxComboBox;
QDateEdit fromDateEdit;
QDateEdit toDateEdit;
public CustomFilter() {
QStandardItemModel model = createMailModel(this);
proxyModel = new MySortFilterProxyModel(this);
proxyModel.setSourceModel(model);
proxyModel.setDynamicSortFilter(true);
sourceView = new QTreeView();
sourceView.setRootIsDecorated(false);
sourceView.setAlternatingRowColors(true);
sourceView.setModel(model);
QHBoxLayout sourceLayout = new QHBoxLayout();
sourceLayout.addWidget(sourceView);
sourceGroupBox = new QGroupBox(tr("Original Model"));
sourceGroupBox.setLayout(sourceLayout);
filterPatternLineEdit = new QLineEdit("Grace|Sports");
filterPatternLabel = new QLabel(tr("&Filter pattern:"));
filterPatternLabel.setBuddy(filterPatternLineEdit);
filterSyntaxComboBox = new QComboBox();
filterSyntaxComboBox.addItem(tr("Regular expression"),
QRegExp.PatternSyntax.RegExp);
filterSyntaxComboBox.addItem(tr("Wildcard"),
QRegExp.PatternSyntax.Wildcard);
filterSyntaxComboBox.addItem(tr("Fixed string"),
QRegExp.PatternSyntax.FixedString);
filterCaseSensitivityCheckBox = new QCheckBox(
tr("Case sensitive filter"));
filterCaseSensitivityCheckBox.setChecked(true);
fromDateEdit = new QDateEdit(new QDate(1970, 01, 01));
fromLabel = new QLabel(tr("F&rom:"));
fromLabel.setBuddy(fromDateEdit);
toDateEdit = new QDateEdit(new QDate(2099, 12, 31));
toLabel = new QLabel(tr("&To:"));
toLabel.setBuddy(toDateEdit);
filterPatternLineEdit.textChanged.connect(this, "textFilterChanged()");
filterSyntaxComboBox.currentIndexChanged.connect(this,
"textFilterChanged()");
filterCaseSensitivityCheckBox.toggled.connect(this,
"textFilterChanged()");
fromDateEdit.dateChanged.connect(this, "dateFilterChanged()");
toDateEdit.dateChanged.connect(this, "dateFilterChanged()");
proxyView = new QTreeView();
proxyView.setRootIsDecorated(false);
proxyView.setAlternatingRowColors(true);
proxyView.setModel(proxyModel);
proxyView.setSortingEnabled(true);
proxyView.sortByColumn(1, Qt.SortOrder.AscendingOrder);
QGridLayout proxyLayout = new QGridLayout();
proxyLayout.addWidget(proxyView, 0, 0, 1, 3);
proxyLayout.addWidget(filterPatternLabel, 1, 0);
proxyLayout.addWidget(filterPatternLineEdit, 1, 1);
proxyLayout.addWidget(filterSyntaxComboBox, 1, 2);
proxyLayout.addWidget(filterCaseSensitivityCheckBox, 2, 0, 1, 3);
proxyLayout.addWidget(fromLabel, 3, 0);
proxyLayout.addWidget(fromDateEdit, 3, 1, 1, 2);
proxyLayout.addWidget(toLabel, 4, 0);
proxyLayout.addWidget(toDateEdit, 4, 1, 1, 2);
proxyGroupBox = new QGroupBox(tr("Sorted/Filtered Model"));
proxyGroupBox.setLayout(proxyLayout);
QVBoxLayout mainLayout = new QVBoxLayout();
mainLayout.addWidget(sourceGroupBox);
mainLayout.addWidget(proxyGroupBox);
setLayout(mainLayout);
setWindowTitle(tr("Custom Sort/Filter Model"));
setWindowIcon(new QIcon("classpath:com/trolltech/images/qt-logo.png"));
resize(500, 450);
textFilterChanged();
dateFilterChanged();
}
private void addMail(QAbstractItemModel model, String subject,
String sender, QDateTime date) {
model.insertRow(0);
model.setData(model.index(0, 0), subject);
model.setData(model.index(0, 1), sender);
model.setData(model.index(0, 2), date);
}
private QStandardItemModel createMailModel(QObject parent) {
QStandardItemModel model = new QStandardItemModel(0, 3, parent);
model.setHeaderData(0, Qt.Orientation.Horizontal, tr("Subject"));
model.setHeaderData(1, Qt.Orientation.Horizontal, tr("Sender"));
model.setHeaderData(2, Qt.Orientation.Horizontal, tr("Date"));
addMail(model, "Happy New Year!", "Grace K. <grace@software-inc.com>",
new QDateTime(new QDate(2006, 12, 31), new QTime(17, 03)));
addMail(model, "Radically new concept",
"Grace K. <grace@software-inc.com>",
new QDateTime(new QDate(2006, 12, 22), new QTime(9, 44)));
addMail(model, "Accounts", "pascale@nospam.com",
new QDateTime(new QDate(2006, 12, 31), new QTime(12, 50)));
addMail(model, "Expenses", "Joe Bloggs <joe@bloggs.com>",
new QDateTime(new QDate(2006, 12, 25), new QTime(11, 39)));
addMail(model, "Re: Expenses", "Andy <andy@nospam.com>",
new QDateTime(new QDate(2007, 01, 02), new QTime(16, 05)));
addMail(model, "Re: Accounts", "Joe Bloggs <joe@bloggs.com>",
new QDateTime(new QDate(2007, 01, 03), new QTime(14, 18)));
addMail(model, "Re: Accounts", "Andy <andy@nospam.com>",
new QDateTime(new QDate(2007, 01, 03), new QTime(14, 26)));
addMail(model, "Sports", "Linda Smith <linda.smith@nospam.com>",
new QDateTime(new QDate(2007, 01, 05), new QTime(11, 33)));
addMail(model, "AW: Sports", "Rolf Newschweinstein <rolfn@nospam.com>",
new QDateTime(new QDate(2007, 01, 05), new QTime(12, 00)));
addMail(model, "RE: Sports", "Petra Schmidt <petras@nospam.com>",
new QDateTime(new QDate(2007, 01, 05), new QTime(12, 01)));
return model;
}
private void textFilterChanged() {
QRegExp.PatternSyntax syntax;
int index = filterSyntaxComboBox.currentIndex();
syntax = (QRegExp.PatternSyntax) filterSyntaxComboBox.itemData(index);
Qt.CaseSensitivity caseSensitivity;
if (filterCaseSensitivityCheckBox.isChecked())
caseSensitivity = Qt.CaseSensitivity.CaseSensitive;
else
caseSensitivity = Qt.CaseSensitivity.CaseInsensitive;
QRegExp regExp = new QRegExp(filterPatternLineEdit.text(),
caseSensitivity, syntax);
proxyModel.setFilterRegExp(regExp);
}
private void dateFilterChanged() {
proxyModel.setFilterMinimumDate(fromDateEdit.date());
proxyModel.setFilterMaximumDate(toDateEdit.date());
}
private class MySortFilterProxyModel extends QSortFilterProxyModel {
private QDateTime minDate = new QDateTime();
private QDateTime maxDate = new QDateTime();
private MySortFilterProxyModel(QObject parent) {
super(parent);
}
private void setFilterMinimumDate(QDate date) {
minDate = new QDateTime(date);
invalidateFilter();
}
private void setFilterMaximumDate(QDate date) {
maxDate = new QDateTime(date);
invalidateFilter();
}
@Override
protected boolean filterAcceptsRow(int sourceRow,
QModelIndex sourceParent) {
QModelIndex index0;
QModelIndex index1;
QModelIndex index2;
index0 = sourceModel().index(sourceRow, 0, sourceParent);
index1 = sourceModel().index(sourceRow, 1, sourceParent);
index2 = sourceModel().index(sourceRow, 2, sourceParent);
QRegExp filter = filterRegExp();
QAbstractItemModel model = sourceModel();
boolean matchFound;
matchFound = filter.indexIn(model.data(index0).toString()) != -1
|| filter.indexIn(model.data(index1).toString()) != -1;
return matchFound && dateInRange((QDateTime) (model.data(index2)));
}
@Override
protected boolean lessThan(QModelIndex left, QModelIndex right) {
boolean result = false;
Object leftData = sourceModel().data(left);
Object rightData = sourceModel().data(right);
if (leftData instanceof QDateTime
&& rightData instanceof QDateTime) {
QDateTime leftDate = (QDateTime) leftData;
QDateTime rightDate = (QDateTime) rightData;
result = leftDate.compareTo(rightDate) < 0;
} else {
QRegExp emailPattern = new QRegExp("([\\w\\.]*@[\\w\\.]*)");
String leftString = leftData.toString();
if(left.column() == 1 && emailPattern.indexIn(leftString) != -1)
leftString = emailPattern.cap(1);
String rightString = rightData.toString();
if(right.column() == 1 && emailPattern.indexIn(rightString) != -1)
rightString = emailPattern.cap(1);
result = leftString.compareTo(rightString) < 0;
}
return result;
}
private boolean dateInRange(QDateTime date) {
return (minDate.compareTo(date) < 0 && maxDate.compareTo(date) > 0);
}
}
}
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Qt Jambi 4.4.3_01 |