Skip to content
GitLab
Projects
Groups
Snippets
/
Help
Help
Support
Community forum
Keyboard shortcuts
?
Submit feedback
Contribute to GitLab
Sign in
Toggle navigation
Menu
Open sidebar
Marco Bubke
flatpak-qt-creator
Commits
8f20c52f
Commit
8f20c52f
authored
Mar 09, 2010
by
Rohan Shetty
Committed by
Oswald Buddenhagen
Mar 12, 2010
Browse files
Changes made to the Debugger section as per comments and Setting the Symbol Server section added
parent
e11b434e
Changes
2
Hide whitespace changes
Inline
Side-by-side
doc/images/qtcreator-serverbutton.png
0 → 100644
View file @
8f20c52f
1003 Bytes
doc/qtcreator.qdoc
View file @
8f20c52f
...
...
@@ -2103,6 +2103,97 @@
\
note
The
set
of
watched
items
is
saved
in
your
session
.
\
section1
Walkthrough
for
the
Debugger
Frontend
In
our
\
l
{
Writing
a
simple
program
}{
TextFinder
}
example
,
we
read
a
text
file
into
QString
and
then
display
it
with
QTextEdit
.
Suppose
you
want
to
look
at
this
QString
,
\
c
{
line
},
and
see
what
data
it
actually
stores
.
Follow
the
steps
described
below
to
place
a
breakpoint
and
view
the
QString
object
's data.
\table
\row
\i \inlineimage qtcreator-setting-breakpoint1.png
\i \bold{Setting a Breakpoint}
\list 1
\o Click in between the line number and the window border on the line
where we invoke \l{http://doc.trolltech.com/qtextedit.html#plainText-prop}{setPlainText()}
to set a breakpoint.
\o Select \gui{Start Debugging} from the \gui{Debug} menu or press \key{F5}.
\endlist
\row
\i \inlineimage qtcreator-setting-breakpoint2.png
\i \bold{Viewing and removing breakpoints}
Breakpoints are visible in the \gui{Breakpoints} view in
\gui{Debug} mode. To remove a breakpoint, right-click on
it and select \gui{Delete breakpoint} from the context menu.
\row
\i \inlineimage qtcreator-watcher.png
\i \bold{Viewing Locals and Watchers}
To view the contents of \c{line}, go to the \gui{Locals and
Watchers} view.
\endtable
Suppose we modify our \c{on_findButton_clicked()} function to move back to
the start of the document and continue searching once the cursor hits the
end of the document. Adding this functionality can be done with the code
snippet below:
\code
void TextFinder::on_findButton_clicked()
{
QString searchString = ui->lineEdit->text();
QTextDocument *document = ui->textEdit->document();
QTextCursor cursor = ui->textEdit->textCursor();
cursor = document->find(searchString, cursor,
QTextDocument::FindWholeWords);
ui->textEdit->setTextCursor(cursor);
bool found = cursor.isNull();
if (!found && previouslyFound) {
int ret = QMessageBox::question(this, tr("End of Document"),
tr("I have reached the end of the document. Would you like "
"me to start searching from the beginning of the document?"),
QMessageBox::Yes | QMessageBox::No, QMessageBox::Yes);
if (ret == QMessageBox::Yes) {
cursor = document->find(searchString,
QTextDocument::FindWholeWords);
ui->textEdit->setTextCursor(cursor);
} else
return;
}
previouslyFound = found;
}
\endcode
However, if you compile and run this code, the application does not work
correctly due to a logic error. To locate this logic error, step
through the code using the following buttons:
\image qtcreator-debugging-buttons.png
\section1 Setting the Symbol Server
To obtain operating system libraries for debugging Windows applications,
you have to add the Symbol Server:
\list 1
\o Select \gui Tools > \gui Options > \gui Debugger > \gui Cdb
\o Click \inlineimage qtcreator-serverbutton.png
located next to the \gui{Insert...} button of the Symbol paths
field and select \gui{Symbol Server...}
\o Select a directory where you want to store the cached information
and click \gui OK.
\endlist
\section1 Debugging Helper Library with C++
While debugging, Qt Creator dynamically loads a helper library into your
...
...
@@ -2365,84 +2456,6 @@
\endlist
\
section1
Walkthrough
for
the
Debugger
Frontend
In
our
\
l
{
Writing
a
simple
program
}{
TextFinder
}
example
,
we
read
a
text
file
into
QString
and
then
display
it
with
QTextEdit
.
Suppose
you
want
to
look
at
this
QString
,
\
c
{
line
},
and
see
what
data
it
actually
stores
.
Follow
the
steps
described
below
to
place
a
breakpoint
and
view
the
QString
object
's data.
\table
\row
\i \inlineimage qtcreator-setting-breakpoint1.png
\i \bold{Setting a Breakpoint}
\list 1
\o Click in between the line number and the window border on the line
where we invoke \l{http://doc.trolltech.com/qtextedit.html#plainText-prop}{setPlainText()}
to set a breakpoint.
\o Select \gui{Start Debugging} from the \gui{Debug} menu or press \key{F5}.
\endlist
\row
\i \inlineimage qtcreator-setting-breakpoint2.png
\i \bold{Viewing and removing breakpoints}
Breakpoints are visible in the \gui{Breakpoints} view in
\gui{Debug} mode. To remove a breakpoint, right-click on
it and select \gui{Delete breakpoint} from the context menu.
\row
\i \inlineimage qtcreator-watcher.png
\i \bold{Viewing Locals and Watchers}
To view the contents of \c{line}, go to the \gui{Locals and
Watchers} view.
\endtable
Suppose we modify our \c{on_findButton_clicked()} function to move back to
the start of the document and continue searching once the cursor hits the
end of the document. Adding this functionality can be done with the code
snippet below:
\code
void TextFinder::on_findButton_clicked()
{
QString searchString = ui->lineEdit->text();
QTextDocument *document = ui->textEdit->document();
QTextCursor cursor = ui->textEdit->textCursor();
cursor = document->find(searchString, cursor,
QTextDocument::FindWholeWords);
ui->textEdit->setTextCursor(cursor);
bool found = cursor.isNull();
if (!found && previouslyFound) {
int ret = QMessageBox::question(this, tr("End of Document"),
tr("I have reached the end of the document. Would you like "
"me to start searching from the beginning of the document?"),
QMessageBox::Yes | QMessageBox::No, QMessageBox::Yes);
if (ret == QMessageBox::Yes) {
cursor = document->find(searchString,
QTextDocument::FindWholeWords);
ui->textEdit->setTextCursor(cursor);
} else
return;
}
previouslyFound = found;
}
\endcode
However, if you compile and run this code, the application does not work
correctly due to a logic error. To locate this logic error, step
through the code using the following buttons:
\image qtcreator-debugging-buttons.png
*/
...
...
Write
Preview
Supports
Markdown
0%
Try again
or
attach a new file
.
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Cancel
Please
register
or
sign in
to comment