Are there good solution to reset text formatting (e.g. bold) after press Space button for QTextEdit?
Example of case:
boldText notBoldText // After press Space button text is not bold anymore
For example, I can use QWidget::eventFilter(...) and check inside
if (key == Qt::Key_Space) { ... }
But it looks bad.
It's how I set formatting now:
QTextCursor cursor = textCursor();
if (!cursor.hasSelection())
return;
QTextCharFormat fmt;
fmt.setFontWeight(cursor.charFormat().font().bold() ? QFont::Normal : QFont::DemiBold);
cursor.mergeCharFormat(format);
mergeCurrentCharFormat(format);
Related
I am developing a cpp/Qt tool.When I click on a QLineEdit field, its frame turns to a different color and the cursor starts blinking.When I type on Return in the field, I want its cursor to stop blinking and its frame color to default back to normal.I can intercept the Return Pressed, but when I then start the clearFocus() command, the keyboard input does not come anymore to the QLineEdit field (which is the behaviour I am expecting), but its frame doesn't go back to the default color and the cursor continues blinking. How to really remove focus from the field (i.e.: No cursor blinking anymore and frame back to default color) ?
=== EDIT ===
Here is the code:
void myQLineEditClass::keyPressEvent(QKeyEvent *e)
{
if(e->text().length()>0)
{
int asciiVal = e->text().at(0).toAscii();
if (asciiVal==3||asciiVal==13)
{
MGlobal::displayInfo(MQtUtil::toMString(QString().sprintf("Focus cleared"))); // -> this is properly displayed
clearFocus();
}
}
QLineEdit::keyPressEvent(e);
}
Thanks.
I am trying to make all text in a QTextEdit capital, but currently am failing. This is my code and it does nothing.
void MainWindow::on_actionCapital_triggered()
{
QTextCharFormat capital2;
capital2.setFontCapitalization(QFont::AllUppercase);
ui->textEdit->setCurrentCharFormat(capital2);
}
I am a java coder, so c++ is not my strong point
I also tried the following code with no success:
QFont font = ui->textEdit->font();
font.setCapitalization(QFont::AllUppercase);
ui->textEdit->setFont(font);
Can someone please point me to the right direction?
I figured it out not the most elegant solution, but it will do its job:
void MainWindow::on_actionCapital_triggered()
{
QTextCursor c = ui->textEdit->textCursor();
int current = c.position();
if(capital)
{
QTextCharFormat capital2;
capital2.setFontCapitalization(QFont::MixedCase);
ui->textEdit->selectAll();
ui->textEdit->setCurrentCharFormat(capital2);
capital = false;
}
else
{
QTextCharFormat capital2;
capital2.setFontCapitalization(QFont::AllUppercase);
ui->textEdit->selectAll();
ui->textEdit->setCurrentCharFormat(capital2);
capital = true;
}
c = ui->textEdit->textCursor();
c.setPosition(current);
c.setPosition(current, QTextCursor::KeepAnchor);
ui->textEdit->setTextCursor(c);
}
With this code you can switch between all Upper case and mixed case.
For some reason the setCurrentCharFormat only works when the text is selected.
So I had to get the current cursor position and then select all apply the FontCapitalization and then set the cursor back to where it was.
I don't want mouse middle button to paste text in my QTextEdit. This code doesn't work. TextEdit inherits QTextEdit. After mouse middle button pastes it pastes copied text.
void TextEdit::mousePressEvent ( QMouseEvent * e ) {
if (e->button() == Qt::MidButton) {
e->accept();
return;
};
QTextEdit::mousePressEvent(e);
}
As mouse clicks are usually registered when the button is released, you should redefine the mouseReleaseEvent function.
You don't even need to redefine mousePressEvent, because the middle button isn't handled at all by that function.
I'm assuming you're using Linux here; right clicking in the window is likely to be triggering an insertion of mime data before you get to handle the mouse event, which is why it is still pasting text.
Therefore, according to Qt docs for paste: - " to modify what QTextEdit can paste and how it is being pasted, reimplement the virtual canInsertFromMimeData() and insertFromMimeData() functions."
I've been in the same case, that is to say: having parts of my CustomQTextEdit required to be non-editable.
As I truly love the middle mouse button paste feature, I did not wanted to disable it. So, here is the (more or less quick and dirty coded) workaround I used:
void QTextEditHighlighter::mouseReleaseEvent(QMouseEvent *e)
{
QString prev_text;
if (e->button() == Qt::MidButton) {
// Backup the text as it is before middle button click
prev_text = this->toPlainText();
// And let the paste operation occure...
// e->accept();
// return;
}
// !!!!
QTextEdit::mouseReleaseEvent(e);
// !!!!
if (e->button() == Qt::MidButton) {
/*
* Keep track of the editbale ranges (up to you).
* My way is a single one range inbetween the unique
* tags "//# BEGIN_EDIT" and "//# END_EDIT"...
*/
QRegExp begin_regexp = QRegExp("(^|\n)(\\s)*//# BEGIN_EDIT[^\n]*(?=\n|$)");
QRegExp end_regexp = QRegExp("(^|\n)(\\s)*//# END_EDIT[^\n]*(?=\n|$)");
QTextCursor from = QTextCursor(this->document());
from.movePosition(QTextCursor::Start);
QTextCursor cursor_begin = this->document()->find(begin_regexp, from);
QTextCursor cursor_end = this->document()->find(end_regexp, from);
cursor_begin.movePosition(QTextCursor::EndOfBlock);
cursor_end.movePosition(QTextCursor::StartOfBlock);
int begin_pos = cursor_begin.position();
int end_pos = cursor_end.position();
if (!(cursor_begin.isNull() || cursor_end.isNull())) {
// Deduce the insertion index by finding the position
// of the first character that changed between previous
// text and the current "after-paste" text
int insert_pos; //, end_insert_pos;
std::string s_cur = this->toPlainText().toStdString();
std::string s_prev = prev_text.toStdString();
int i_max = std::min(s_cur.length(), s_prev.length());
for (insert_pos=0; insert_pos < i_max; insert_pos++) {
if (s_cur[insert_pos] != s_prev[insert_pos])
break;
}
// If the insertion point is not in my editable area: just restore the
// text as it was before the paste occured
if (insert_pos < begin_pos+1 || insert_pos > end_pos) {
// Restore text (ghostly)
((MainWindow *)this->topLevelWidget())->disconnect(this, SIGNAL(textChanged()), ((MainWindow *)this->topLevelWidget()), SLOT(on_textEdit_CustomMacro_textChanged()));
this->setText(prev_text);
((MainWindow *)this->topLevelWidget())->connect(this, SIGNAL(textChanged()), ((MainWindow *)this->topLevelWidget()), SLOT(on_textEdit_CustomMacro_textChanged()));
}
}
}
}
There are functions like textEdit->textCursor()->selectionStart() and textEdit->textCursor()->selectionEnd(), but there are no functions setSelectionStart, setSelectionEnd.
Is there any way to select some part of text manually?
QTextCursor c = textEdit->textCursor();
c.setPosition(startPos);
c.setPosition(endPos, QTextCursor::KeepAnchor);
textEdit->setTextCursor(c);
This piece of code moves the cursor to the start position of the selection using setPosition, then moves it to the end of the selection, but leaves the selection anchor at the old position by specifying a MoveMode as the second parameter.
The last line sets the selection to be visible inside the edit control, so you should skip it if you just want to do some manipulations with the selected text.
Also, if you don't have the exact positions, movePosition is helpful: you can move the cursor in various ways, such as one word to the right or down one line.
I encountered a similar problem.
In Windows 10, there might be a bug of 'drag/move'. We use QT_NO_DRAGANDDROP as a compiler option, which makes text selection in QTextEdit not work anymore.
Solution:
void QTextEditEx::mouseMoveEvent(QMouseEvent *event)
{
QTextEdit::mouseMoveEvent(event);
if (event->buttons() & Qt::LeftButton)
{
QTextCursor cursor = textCursor();
QTextCursor endCursor = cursorForPosition(event->pos()); // key point
cursor.setPosition(pos, QTextCursor::MoveAnchor);
cursor.setPosition(endCursor.position(), QTextCursor::KeepAnchor);
setTextCursor(cursor);
}
}
void QTextEditEx::mousePressEvent(QMouseEvent *event)
{
QTextEdit::mousePressEvent(event);
if (event->buttons() & Qt::LeftButton)
{
QTextCursor cursor = cursorForPosition(event->pos());
// int pos; member variable
pos = cursor.position();
cursor.clearSelection();
setTextCursor(cursor);
}
}
reference:
Two existing answers
QTextEdit: get word under the mouse pointer?
Try to use:
QTextCursor cur = tw->textCursor();
cur.clearSelection();
tw->setTextCursor(cur);
The code below does not highlight the search term when it is found. In fact the cursor disappears from the QPlainTextEdit (called ui->Editor) after pressing the 'next' button. What's causing it?
void TextEditor::findNextInstanceOfSearchTerm()
{
QString searchTerm = this->edtFind->text();
if(this->TextDocument == NULL)
{
this->TextDocument = ui->Editor->document();
}
QTextCursor documentCursor(this->TextDocument);
documentCursor = this->TextDocument->find(searchTerm,documentCursor);
if(!documentCursor.isNull())
{
documentCursor.select(QTextCursor::WordUnderCursor);
}else
{
ui->statusbar->showMessage("\""+searchTerm+"\" could not be found",MESSAGE_DURATION);
}
}
Firstly, your code creates a new cursor at the beginning of the document each time you press the next button, so you will always search from the beginning. Secondly, you must understand that the cursor you manipulate has nothing to do with the one in your QPlainTextEdit: you manipulate a copy. If you want to impact the text edit, you must modify its cursor using setTextCursor. Here is a working solution:
void TextEditor::findNextInstanceOfSearchTerm()
{
QString searchTerm = this->edtFind->text();
if(this->TextDocument == NULL)
{
this->TextDocument = ui->Editor->document();
}
// get the current cursor
QTextCursor documentCursor = ui->Editor->textCursor();
documentCursor = this->TextDocument->find(searchTerm,documentCursor);
if(!documentCursor.isNull())
{
// needed only if you want the entire word to be selected
documentCursor.select(QTextCursor::WordUnderCursor);
// modify the text edit cursor
ui->Editor->setTextCursor(documentCursor);
}
else
{
ui->statusbar->showMessage(
"\""+searchTerm+"\" could not be found",MESSAGE_DURATION);
}
}
As a side note, you might want to know that QPlainTextEdit provides a find method, so this might be an easier way to achieve what you want:
void TextEditor::findNextInstanceOfSearchTerm()
{
QString searchTerm = this->edtFind->text();
bool found = ui->Editor->find(searchTerm);
if (found)
{
QTextCursor cursor = ui->Editor->textCursor();
cursor.select(QTextCursor::WordUnderCursor);
ui->Editor->setTextCursor(cursor);
}
else
{
// set message in status bar
}
}
Use QTextCursor::EndOfWord
Use QPlainTextEdit::setExtraSelections to select/highlight something in QPlainTextEdit
Simply you already have cursor that would highlight word, but you didn't apply it to text edit