From bd0f3345a938b35ce6a12f6150373b0955b8dd12 Mon Sep 17 00:00:00 2001 From: Timothy Pearson Date: Sun, 10 Jul 2011 15:24:15 -0500 Subject: Add Qt3 development HEAD version --- doc/html/regexptester-example.html | 299 +++++++++++++++++++++++++++++++++++++ 1 file changed, 299 insertions(+) create mode 100644 doc/html/regexptester-example.html (limited to 'doc/html/regexptester-example.html') diff --git a/doc/html/regexptester-example.html b/doc/html/regexptester-example.html new file mode 100644 index 0000000..982ce82 --- /dev/null +++ b/doc/html/regexptester-example.html @@ -0,0 +1,299 @@ + + + + + +A Small Application for Testing Regular Expressions + + + + + + + +

A Small Application for Testing Regular Expressions

+ + + +

Regular expressions can sometimes be tricky to get right, +especially those that use the * quantifier. This application lets +you type in a regexp (without doubling the backslashes) and some +test text, and to execute the regexp and see the results. If you +click the Copy button the regexp will be copied to the clipboard +(with the backslashes doubled, ready for you to paste into your +program). Previous regexps and test texts are remembered +throughout the session and can be accessed by dropping down the +comboboxes. +

Header file: +

#ifndef REGEXPTESTER_H
+#define REGEXPTESTER_H
+
+#include <qdialog.h>
+
+class QCheckBox;
+class QComboBox;
+class QLabel;
+class QPushButton;
+class QStatusBar;
+class QTable;
+
+class RegexpTester : public QDialog
+{
+    Q_OBJECT
+
+public:
+    RegexpTester(QWidget* parent=0, const char* name=0, bool modal=false,
+                 WFlags f=0);
+
+    QLabel *regexLabel;
+    QComboBox *regexComboBox;
+    QLabel *textLabel;
+    QComboBox *textComboBox;
+    QCheckBox *caseSensitiveCheckBox;
+    QCheckBox *minimalCheckBox;
+    QCheckBox *wildcardCheckBox;
+    QTable *resultTable;
+    QPushButton *executePushButton;
+    QPushButton *copyPushButton;
+    QPushButton *quitPushButton;
+    QStatusBar *statusBar;
+
+public slots:
+    void copy();
+    void execute();
+
+private:
+    void languageChange();
+};
+
+#endif // REGEXPTESTER_H
+

+ +

Implementation: +

#include <qapplication.h>
+#include <qcheckbox.h>
+#include <qclipboard.h>
+#include <qcombobox.h>
+#include <qlabel.h>
+#include <qlayout.h>
+#include <qpushbutton.h>
+#include <qregexp.h>
+#include <qstatusbar.h>
+#include <qtable.h>
+
+#include "regexptester.h"
+
+
+RegexpTester::RegexpTester(QWidget* parent, const char* name, bool modal,
+                           WFlags f)
+    : QDialog(parent, name, modal, f)
+{
+    regexLabel = new QLabel(this);
+    regexComboBox = new QComboBox(this);
+    regexComboBox->setEditable(true);
+    regexComboBox->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
+    regexLabel->setBuddy(regexComboBox);
+    textLabel = new QLabel(this);
+    textComboBox = new QComboBox(this);
+    textComboBox->setEditable(true);
+    textComboBox->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
+    textLabel->setBuddy(textComboBox);
+    caseSensitiveCheckBox = new QCheckBox(this);
+    caseSensitiveCheckBox->setChecked(true);
+    minimalCheckBox = new QCheckBox(this);
+    wildcardCheckBox = new QCheckBox(this);
+    resultTable = new QTable(3, 3, this);
+    resultTable->verticalHeader()->hide();
+    resultTable->setLeftMargin(0);
+    resultTable->horizontalHeader()->hide();
+    resultTable->setTopMargin(0);
+    resultTable->setReadOnly(true);
+    executePushButton = new QPushButton(this);
+    executePushButton->setDefault(true);
+    copyPushButton = new QPushButton(this);
+    quitPushButton = new QPushButton(this);
+    statusBar = new QStatusBar(this);
+
+    QGridLayout *gridLayout = new QGridLayout(2, 2, 6);
+    gridLayout->addWidget(regexLabel, 0, 0);
+    gridLayout->addWidget(regexComboBox, 0, 1);
+    gridLayout->addWidget(textLabel, 1, 0);
+    gridLayout->addWidget(textComboBox, 1, 1);
+    QHBoxLayout *checkboxLayout = new QHBoxLayout(0, 6, 6);
+    checkboxLayout->addWidget(caseSensitiveCheckBox);
+    checkboxLayout->addWidget(minimalCheckBox);
+    checkboxLayout->addWidget(wildcardCheckBox);
+    checkboxLayout->addStretch(1);
+    QVBoxLayout *buttonLayout = new QVBoxLayout(0, 6, 6);
+    buttonLayout->addWidget(executePushButton);
+    buttonLayout->addWidget(copyPushButton);
+    buttonLayout->addWidget(quitPushButton);
+    buttonLayout->addStretch(1);
+    QHBoxLayout *middleLayout = new QHBoxLayout(0, 6, 6);
+    middleLayout->addWidget(resultTable);
+    middleLayout->addLayout(buttonLayout);
+    QVBoxLayout *mainLayout = new QVBoxLayout(this, 6, 6);
+    mainLayout->addLayout(gridLayout);
+    mainLayout->addLayout(checkboxLayout);
+    mainLayout->addLayout(middleLayout);
+    mainLayout->addWidget(statusBar);
+
+    resize(QSize(500, 350).expandedTo(minimumSizeHint()));
+
+    languageChange();
+
+    connect(copyPushButton, SIGNAL(clicked()), this, SLOT(copy()));
+    connect(executePushButton, SIGNAL(clicked()), this, SLOT(execute()));
+    connect(quitPushButton, SIGNAL(clicked()), this, SLOT(accept()));
+
+    execute();
+}
+
+void RegexpTester::execute()
+{
+    QString regex = regexComboBox->currentText();
+    QString text = textComboBox->currentText();
+    if (!regex.isEmpty() && !text.isEmpty()) {
+        QRegExp re(regex);
+        re.setCaseSensitive(caseSensitiveCheckBox->isChecked());
+        re.setMinimal(minimalCheckBox->isChecked());
+        bool wildcard = wildcardCheckBox->isChecked();
+        re.setWildcard(wildcard);
+        if (!re.isValid()) {
+            statusBar->message(tr("Invalid regular expression: %1")
+                                .arg(re.errorString()));
+            return;
+        }
+        int offset = re.search(text);
+        int captures = re.numCaptures();
+        int row = 0;
+        const int OFFSET = 5;
+        resultTable->setNumRows(0);
+        resultTable->setNumRows(captures + OFFSET);
+        resultTable->setText(row, 0, tr("Regex"));
+        QString escaped = regex;
+        escaped = escaped.replace("\\", "\\\\");
+        resultTable->setText(row, 1, escaped);
+        resultTable->item(row, 1)->setSpan(1, 2);
+        if (offset != -1) {
+            ++row;
+            resultTable->setText(row, 0, tr("Offset"));
+            resultTable->setText(row, 1, QString::number(offset));
+            resultTable->item(row, 1)->setSpan(1, 2);
+            if (!wildcard) {
+                ++row;
+                resultTable->setText(row, 0, tr("Captures"));
+                resultTable->setText(row, 1, QString::number(captures));
+                resultTable->item(row, 1)->setSpan(1, 2);
+                ++row;
+                resultTable->setText(row, 1, tr("Text"));
+                resultTable->setText(row, 2, tr("Characters"));
+            }
+            ++row;
+            resultTable->setText(row, 0, tr("Match"));
+            resultTable->setText(row, 1, re.cap(0));
+            resultTable->setText(row, 2, QString::number(re.matchedLength()));
+            if (!wildcard) {
+                for (int i = 1; i <= captures; ++i) {
+                    resultTable->setText(row + i, 0, tr("Capture #%1").arg(i));
+                    resultTable->setText(row + i, 1, re.cap(i));
+                    resultTable->setText(row + i, 2,
+                                        QString::number(re.cap(i).length()));
+                }
+            }
+            else
+                resultTable->setNumRows(3);
+        }
+        else {
+            resultTable->setNumRows(2);
+            ++row;
+            resultTable->setText(row, 0, tr("No matches"));
+            resultTable->item(row, 0)->setSpan(1, 3);
+        }
+        resultTable->adjustColumn(0);
+        resultTable->adjustColumn(1);
+        resultTable->adjustColumn(2);
+        statusBar->message(tr("Executed \"%1\" on \"%2\"")
+                                .arg(escaped).arg(text));
+    }
+    else
+        statusBar->message(tr("A regular expression and a text must be given"));
+}
+
+void RegexpTester::copy()
+{
+    QString escaped = regexComboBox->currentText();
+    if (!escaped.isEmpty()) {
+        escaped = escaped.replace("\\", "\\\\");
+        QClipboard *cb = QApplication::clipboard();
+        cb->setText(escaped, QClipboard::Clipboard);
+        if (cb->supportsSelection())
+            cb->setText(escaped, QClipboard::Selection);
+        statusBar->message(tr("Copied \"%1\" to the clipboard")
+                                .arg(escaped));
+    }
+}
+
+void RegexpTester::languageChange()
+{
+    setCaption(tr("Regex Tester"));
+    regexLabel->setText(tr("&Regex:"));
+    regexComboBox->insertItem(tr("[A-Z]+=(\\d+):(\\d*)"));
+    textLabel->setText(tr("&Text:"));
+    textComboBox->insertItem(tr("ABC=12:3456"));
+    caseSensitiveCheckBox->setText(tr("Case &Sensitive"));
+    minimalCheckBox->setText(tr("&Minimal"));
+    wildcardCheckBox->setText(tr("&Wildcard"));
+    copyPushButton->setText(tr("&Copy"));
+    executePushButton->setText(tr("&Execute"));
+    quitPushButton->setText(tr("&Quit"));
+}
+
+

+ +

Main: +

#include <qapplication.h>
+#include "regexptester.h"
+
+int main(int argc, char **argv)
+{
+    QApplication app(argc, argv);
+    RegexpTester form;
+    form.show();
+    app.connect(&app, SIGNAL(lastWindowClosed()), &app, SLOT(quit()));
+    return app.exec();
+}
+

+ +