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< title > A Small Application for Testing Regular Expressions< / title >
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< td align = "right" valign = "center" > < img src = "logo32.png" align = "right" width = "64" height = "32" border = "0" > < / td > < / tr > < / table > < h1 align = center > A Small Application for Testing Regular Expressions< / h1 >
< p >
< p > 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.
< p > < hr >
< p > Header file:
< p > < pre > #ifndef REGEXPTESTER_H
#define REGEXPTESTER_H
#include < < a href = "tqdialog-h.html" > tqdialog.h< / a > >
class TQCheckBox;
class TQComboBox;
class TQLabel;
class TQPushButton;
class TQStatusBar;
class TQTable;
class RegexpTester : public < a href = "tqdialog.html" > TQDialog< / a >
{
< a href = "metaobjects.html#TQ_OBJECT" > TQ_OBJECT< / a >
public:
RegexpTester(TQWidget* parent=0, const char* name=0, bool modal=false,
WFlags f=0);
< a href = "tqlabel.html" > TQLabel< / a > *regexLabel;
< a href = "tqcombobox.html" > TQComboBox< / a > *regexComboBox;
< a href = "tqlabel.html" > TQLabel< / a > *textLabel;
< a href = "tqcombobox.html" > TQComboBox< / a > *textComboBox;
< a href = "tqcheckbox.html" > TQCheckBox< / a > *caseSensitiveCheckBox;
< a href = "tqcheckbox.html" > TQCheckBox< / a > *minimalCheckBox;
< a href = "tqcheckbox.html" > TQCheckBox< / a > *wildcardCheckBox;
< a href = "ntqtable.html" > TQTable< / a > *resultTable;
< a href = "tqpushbutton.html" > TQPushButton< / a > *executePushButton;
< a href = "tqpushbutton.html" > TQPushButton< / a > *copyPushButton;
< a href = "tqpushbutton.html" > TQPushButton< / a > *quitPushButton;
< a href = "tqstatusbar.html" > TQStatusBar< / a > *statusBar;
public slots:
void copy();
void execute();
private:
void languageChange();
};
#endif // REGEXPTESTER_H
< / pre >
< p > < hr >
< p > Implementation:
< p > < pre > #include < < a href = "qapplication-h.html" > ntqapplication.h< / a > >
#include < < a href = "tqcheckbox-h.html" > tqcheckbox.h< / a > >
#include < < a href = "tqclipboard-h.html" > tqclipboard.h< / a > >
#include < < a href = "tqcombobox-h.html" > tqcombobox.h< / a > >
#include < < a href = "tqlabel-h.html" > tqlabel.h< / a > >
#include < < a href = "qlayout-h.html" > ntqlayout.h< / a > >
#include < < a href = "tqpushbutton-h.html" > tqpushbutton.h< / a > >
#include < < a href = "tqregexp-h.html" > tqregexp.h< / a > >
#include < < a href = "tqstatusbar-h.html" > tqstatusbar.h< / a > >
#include < < a href = "qtable-h.html" > ntqtable.h< / a > >
#include "regexptester.h"
< a name = "f556" > < / a > RegexpTester::RegexpTester(TQWidget* parent, const char* name, bool modal,
WFlags f)
: < a href = "tqdialog.html" > TQDialog< / a > (parent, name, modal, f)
{
regexLabel = new < a href = "tqlabel.html" > TQLabel< / a > (this);
regexComboBox = new < a href = "tqcombobox.html" > TQComboBox< / a > (this);
< a name = "x2480" > < / a > regexComboBox-> < a href = "tqcombobox.html#setEditable" > setEditable< / a > (true);
< a name = "x2507" > < / a > regexComboBox-> < a href = "tqwidget.html#setSizePolicy" > setSizePolicy< / a > (TQSizePolicy::Expanding, TQSizePolicy::Preferred);
< a name = "x2482" > < / a > regexLabel-> < a href = "tqlabel.html#setBuddy" > setBuddy< / a > (regexComboBox);
textLabel = new < a href = "tqlabel.html" > TQLabel< / a > (this);
textComboBox = new < a href = "tqcombobox.html" > TQComboBox< / a > (this);
textComboBox-> < a href = "tqcombobox.html#setEditable" > setEditable< / a > (true);
textComboBox-> < a href = "tqwidget.html#setSizePolicy" > setSizePolicy< / a > (TQSizePolicy::Expanding, TQSizePolicy::Preferred);
textLabel-> < a href = "tqlabel.html#setBuddy" > setBuddy< / a > (textComboBox);
caseSensitiveCheckBox = new < a href = "tqcheckbox.html" > TQCheckBox< / a > (this);
< a name = "x2475" > < / a > caseSensitiveCheckBox-> < a href = "tqcheckbox.html#setChecked" > setChecked< / a > (true);
minimalCheckBox = new < a href = "tqcheckbox.html" > TQCheckBox< / a > (this);
wildcardCheckBox = new < a href = "tqcheckbox.html" > TQCheckBox< / a > (this);
resultTable = new < a href = "ntqtable.html" > TQTable< / a > (3, 3, this);
< a name = "x2506" > < / a > resultTable-> < a href = "ntqtable.html#verticalHeader" > verticalHeader< / a > ()-> hide();
< a name = "x2501" > < / a > resultTable-> < a href = "ntqtable.html#setLeftMargin" > setLeftMargin< / a > (0);
< a name = "x2499" > < / a > resultTable-> < a href = "ntqtable.html#horizontalHeader" > horizontalHeader< / a > ()-> hide();
< a name = "x2505" > < / a > resultTable-> < a href = "ntqtable.html#setTopMargin" > setTopMargin< / a > (0);
< a name = "x2503" > < / a > resultTable-> < a href = "ntqtable.html#setReadOnly" > setReadOnly< / a > (true);
executePushButton = new < a href = "tqpushbutton.html" > TQPushButton< / a > (this);
< a name = "x2484" > < / a > executePushButton-> < a href = "tqpushbutton.html#setDefault" > setDefault< / a > (true);
copyPushButton = new < a href = "tqpushbutton.html" > TQPushButton< / a > (this);
quitPushButton = new < a href = "tqpushbutton.html" > TQPushButton< / a > (this);
statusBar = new < a href = "tqstatusbar.html" > TQStatusBar< / a > (this);
< a href = "qgridlayout.html" > TQGridLayout< / a > *gridLayout = new < a href = "qgridlayout.html" > TQGridLayout< / a > (2, 2, 6);
gridLayout-> < a href = "qgridlayout.html#addWidget" > addWidget< / a > (regexLabel, 0, 0);
gridLayout-> < a href = "qgridlayout.html#addWidget" > addWidget< / a > (regexComboBox, 0, 1);
gridLayout-> < a href = "qgridlayout.html#addWidget" > addWidget< / a > (textLabel, 1, 0);
gridLayout-> < a href = "qgridlayout.html#addWidget" > addWidget< / a > (textComboBox, 1, 1);
< a href = "qhboxlayout.html" > TQHBoxLayout< / a > *checkboxLayout = new < a href = "qhboxlayout.html" > TQHBoxLayout< / a > (0, 6, 6);
checkboxLayout-> < a href = "qboxlayout.html#addWidget" > addWidget< / a > (caseSensitiveCheckBox);
checkboxLayout-> < a href = "qboxlayout.html#addWidget" > addWidget< / a > (minimalCheckBox);
checkboxLayout-> < a href = "qboxlayout.html#addWidget" > addWidget< / a > (wildcardCheckBox);
< a name = "x2470" > < / a > checkboxLayout-> < a href = "qboxlayout.html#addStretch" > addStretch< / a > (1);
< a href = "qvboxlayout.html" > TQVBoxLayout< / a > *buttonLayout = new < a href = "qvboxlayout.html" > TQVBoxLayout< / a > (0, 6, 6);
buttonLayout-> < a href = "qboxlayout.html#addWidget" > addWidget< / a > (executePushButton);
buttonLayout-> < a href = "qboxlayout.html#addWidget" > addWidget< / a > (copyPushButton);
buttonLayout-> < a href = "qboxlayout.html#addWidget" > addWidget< / a > (quitPushButton);
buttonLayout-> < a href = "qboxlayout.html#addStretch" > addStretch< / a > (1);
< a href = "qhboxlayout.html" > TQHBoxLayout< / a > *middleLayout = new < a href = "qhboxlayout.html" > TQHBoxLayout< / a > (0, 6, 6);
middleLayout-> < a href = "qboxlayout.html#addWidget" > addWidget< / a > (resultTable);
< a name = "x2469" > < / a > middleLayout-> < a href = "qboxlayout.html#addLayout" > addLayout< / a > (buttonLayout);
< a href = "qvboxlayout.html" > TQVBoxLayout< / a > *mainLayout = new < a href = "qvboxlayout.html" > TQVBoxLayout< / a > (this, 6, 6);
mainLayout-> < a href = "qboxlayout.html#addLayout" > addLayout< / a > (gridLayout);
mainLayout-> < a href = "qboxlayout.html#addLayout" > addLayout< / a > (checkboxLayout);
mainLayout-> < a href = "qboxlayout.html#addLayout" > addLayout< / a > (middleLayout);
mainLayout-> < a href = "qboxlayout.html#addWidget" > addWidget< / a > (statusBar);
< a href = "tqwidget.html#resize" > resize< / a > (TQSize(500, 350).expandedTo(< a href = "tqwidget.html#minimumSizeHint" > minimumSizeHint< / a > ()));
languageChange();
< a href = "tqobject.html#connect" > connect< / a > (copyPushButton, TQ_SIGNAL(< a href = "ntqbutton.html#clicked" > clicked< / a > ()), this, TQ_SLOT(copy()));
< a href = "tqobject.html#connect" > connect< / a > (executePushButton, TQ_SIGNAL(< a href = "ntqbutton.html#clicked" > clicked< / a > ()), this, TQ_SLOT(execute()));
< a href = "tqobject.html#connect" > connect< / a > (quitPushButton, TQ_SIGNAL(< a href = "ntqbutton.html#clicked" > clicked< / a > ()), this, TQ_SLOT(< a href = "tqdialog.html#accept" > accept< / a > ()));
execute();
}
void < a name = "f557" > < / a > RegexpTester::execute()
{
< a name = "x2478" > < / a > < a href = "tqstring.html" > TQString< / a > regex = regexComboBox-> < a href = "tqcombobox.html#currentText" > currentText< / a > ();
< a href = "tqstring.html" > TQString< / a > text = textComboBox-> < a href = "tqcombobox.html#currentText" > currentText< / a > ();
if (!regex.< a href = "tqstring.html#isEmpty" > isEmpty< / a > () & & !text.< a href = "tqstring.html#isEmpty" > isEmpty< / a > ()) {
< a href = "tqregexp.html" > TQRegExp< / a > re(regex);
< a name = "x2491" > < / a > < a name = "x2474" > < / a > re.< a href = "tqregexp.html#setCaseSensitive" > setCaseSensitive< / a > (caseSensitiveCheckBox-> < a href = "tqcheckbox.html#isChecked" > isChecked< / a > ());
< a name = "x2492" > < / a > re.< a href = "tqregexp.html#setMinimal" > setMinimal< / a > (minimalCheckBox-> < a href = "tqcheckbox.html#isChecked" > isChecked< / a > ());
bool wildcard = wildcardCheckBox-> < a href = "tqcheckbox.html#isChecked" > isChecked< / a > ();
< a name = "x2493" > < / a > re.< a href = "tqregexp.html#setWildcard" > setWildcard< / a > (wildcard);
< a name = "x2487" > < / a > if (!re.< a href = "tqregexp.html#isValid" > isValid< / a > ()) {
< a name = "x2494" > < / a > statusBar-> < a href = "tqstatusbar.html#message" > message< / a > (< a href = "tqobject.html#tr" > tr< / a > ("Invalid < a href = "tqregexp.html#regular-expression" > regular expression< / a > : %1")
< a name = "x2486" > < / a > .arg(re.< a href = "tqregexp.html#errorString" > errorString< / a > ()));
return;
}
< a name = "x2490" > < / a > int offset = re.< a href = "tqregexp.html#search" > search< / a > (text);
< a name = "x2489" > < / a > int captures = re.< a href = "tqregexp.html#numCaptures" > numCaptures< / a > ();
int row = 0;
const int OFFSET = 5;
< a name = "x2502" > < / a > resultTable-> < a href = "ntqtable.html#setNumRows" > setNumRows< / a > (0);
resultTable-> < a href = "ntqtable.html#setNumRows" > setNumRows< / a > (captures + OFFSET);
< a name = "x2504" > < / a > resultTable-> < a href = "ntqtable.html#setText" > setText< / a > (row, 0, tr("Regex"));
< a href = "tqstring.html" > TQString< / a > escaped = regex;
< a name = "x2497" > < / a > escaped = escaped.< a href = "tqstring.html#replace" > replace< / a > ("\\", "\\\\");
resultTable-> < a href = "ntqtable.html#setText" > setText< / a > (row, 1, escaped);
< a name = "x2500" > < / a > resultTable-> < a href = "ntqtable.html#item" > item< / a > (row, 1)-> setSpan(1, 2);
if (offset != -1) {
++row;
resultTable-> < a href = "ntqtable.html#setText" > setText< / a > (row, 0, tr("Offset"));
resultTable-> < a href = "ntqtable.html#setText" > setText< / a > (row, 1, TQString::number(offset));
resultTable-> < a href = "ntqtable.html#item" > item< / a > (row, 1)-> setSpan(1, 2);
if (!wildcard) {
++row;
resultTable-> < a href = "ntqtable.html#setText" > setText< / a > (row, 0, tr("Captures"));
resultTable-> < a href = "ntqtable.html#setText" > setText< / a > (row, 1, TQString::number(captures));
resultTable-> < a href = "ntqtable.html#item" > item< / a > (row, 1)-> setSpan(1, 2);
++row;
resultTable-> < a href = "ntqtable.html#setText" > setText< / a > (row, 1, tr("Text"));
resultTable-> < a href = "ntqtable.html#setText" > setText< / a > (row, 2, tr("Characters"));
}
++row;
resultTable-> < a href = "ntqtable.html#setText" > setText< / a > (row, 0, tr("Match"));
< a name = "x2485" > < / a > resultTable-> < a href = "ntqtable.html#setText" > setText< / a > (row, 1, re.< a href = "tqregexp.html#cap" > cap< / a > (0));
< a name = "x2488" > < / a > resultTable-> < a href = "ntqtable.html#setText" > setText< / a > (row, 2, TQString::number(re.< a href = "tqregexp.html#matchedLength" > matchedLength< / a > ()));
if (!wildcard) {
for (int i = 1; i < = captures; ++i) {
resultTable-> < a href = "ntqtable.html#setText" > setText< / a > (row + i, 0, tr("Capture #%1").arg(i));
resultTable-> < a href = "ntqtable.html#setText" > setText< / a > (row + i, 1, re.< a href = "tqregexp.html#cap" > cap< / a > (i));
resultTable-> < a href = "ntqtable.html#setText" > setText< / a > (row + i, 2,
< a name = "x2496" > < / a > TQString::< a href = "tqstring.html#number" > number< / a > (re.< a href = "tqregexp.html#cap" > cap< / a > (i).length()));
}
}
else
resultTable-> < a href = "ntqtable.html#setNumRows" > setNumRows< / a > (3);
}
else {
resultTable-> < a href = "ntqtable.html#setNumRows" > setNumRows< / a > (2);
++row;
resultTable-> < a href = "ntqtable.html#setText" > setText< / a > (row, 0, tr("No matches"));
resultTable-> < a href = "ntqtable.html#item" > item< / a > (row, 0)-> setSpan(1, 3);
}
< a name = "x2498" > < / a > resultTable-> < a href = "ntqtable.html#adjustColumn" > adjustColumn< / a > (0);
resultTable-> < a href = "ntqtable.html#adjustColumn" > adjustColumn< / a > (1);
resultTable-> < a href = "ntqtable.html#adjustColumn" > adjustColumn< / a > (2);
statusBar-> < a href = "tqstatusbar.html#message" > message< / a > (< a href = "tqobject.html#tr" > tr< / a > ("Executed \"%1\" on \"%2\"")
.arg(escaped).arg(text));
}
else
statusBar-> < a href = "tqstatusbar.html#message" > message< / a > (< a href = "tqobject.html#tr" > tr< / a > ("A regular expression and a text must be given"));
}
void < a name = "f558" > < / a > RegexpTester::copy()
{
< a href = "tqstring.html" > TQString< / a > escaped = regexComboBox-> < a href = "tqcombobox.html#currentText" > currentText< / a > ();
if (!escaped.< a href = "tqstring.html#isEmpty" > isEmpty< / a > ()) {
escaped = escaped.< a href = "tqstring.html#replace" > replace< / a > ("\\", "\\\\");
< a name = "x2468" > < / a > < a href = "tqclipboard.html" > TQClipboard< / a > *cb = TQApplication::< a href = "ntqapplication.html#clipboard" > clipboard< / a > ();
< a name = "x2476" > < / a > cb-> < a href = "tqclipboard.html#setText" > setText< / a > (escaped, TQClipboard::Clipboard);
< a name = "x2477" > < / a > if (cb-> < a href = "tqclipboard.html#supportsSelection" > supportsSelection< / a > ())
cb-> < a href = "tqclipboard.html#setText" > setText< / a > (escaped, TQClipboard::Selection);
statusBar-> < a href = "tqstatusbar.html#message" > message< / a > (< a href = "tqobject.html#tr" > tr< / a > ("Copied \"%1\" to the clipboard")
.arg(escaped));
}
}
void < a name = "f559" > < / a > RegexpTester::languageChange()
{
< a href = "tqwidget.html#setCaption" > setCaption< / a > (< a href = "tqobject.html#tr" > tr< / a > ("Regex Tester"));
regexLabel-> < a href = "tqlabel.html#setText" > setText< / a > (< a href = "tqobject.html#tr" > tr< / a > ("& Regex:"));
< a name = "x2479" > < / a > regexComboBox-> < a href = "tqcombobox.html#insertItem" > insertItem< / a > (< a href = "tqobject.html#tr" > tr< / a > ("[A-Z]+=(\\d+):(\\d*)"));
textLabel-> < a href = "tqlabel.html#setText" > setText< / a > (< a href = "tqobject.html#tr" > tr< / a > ("& Text:"));
textComboBox-> < a href = "tqcombobox.html#insertItem" > insertItem< / a > (< a href = "tqobject.html#tr" > tr< / a > ("ABC=12:3456"));
< a name = "x2473" > < / a > caseSensitiveCheckBox-> < a href = "ntqbutton.html#setText" > setText< / a > (< a href = "tqobject.html#tr" > tr< / a > ("Case & Sensitive"));
minimalCheckBox-> < a href = "ntqbutton.html#setText" > setText< / a > (< a href = "tqobject.html#tr" > tr< / a > ("& Minimal"));
wildcardCheckBox-> < a href = "ntqbutton.html#setText" > setText< / a > (< a href = "tqobject.html#tr" > tr< / a > ("& Wildcard"));
copyPushButton-> < a href = "ntqbutton.html#setText" > setText< / a > (< a href = "tqobject.html#tr" > tr< / a > ("& Copy"));
executePushButton-> < a href = "ntqbutton.html#setText" > setText< / a > (< a href = "tqobject.html#tr" > tr< / a > ("& Execute"));
quitPushButton-> < a href = "ntqbutton.html#setText" > setText< / a > (< a href = "tqobject.html#tr" > tr< / a > ("& Quit"));
}
< / pre >
< p > < hr >
< p > Main:
< p > < pre > #include < < a href = "qapplication-h.html" > ntqapplication.h< / a > >
#include "regexptester.h"
int main(int argc, char **argv)
{
< a href = "ntqapplication.html" > TQApplication< / a > app(argc, argv);
RegexpTester form;
< a name = "x2511" > < / a > form.< a href = "tqdialog.html#show" > show< / a > ();
< a name = "x2512" > < / a > < a name = "x2510" > < / a > < a name = "x2509" > < / a > app.< a href = "tqobject.html#connect" > connect< / a > (& app, TQ_SIGNAL(< a href = "ntqapplication.html#lastWindowClosed" > lastWindowClosed< / a > ()), & app, TQ_SLOT(< a href = "ntqapplication.html#quit" > quit< / a > ()));
return app.< a href = "ntqapplication.html#exec" > exec< / a > ();
}
< / pre >
< p > See also < a href = "examples.html" > Examples< / a > .
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< td align = right > < div align = right > TQt 3.3.8< / div >
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