setAlignment does not work again

[giusepped]

I am trying to align the text inside a QTextEdit.
At bound the action menu to the setAlignment() slot of QTextEdit.
But at runtime, besides the fact that no alignment takes place, I got the errors:

Object::connect: No such slot QTextEdit::setAlignment(Qt::AlignRight)

and so on.
The signla/slot binding is:


connect(act_alignright, SIGNAL(triggered(bool)), textEdit,SLOT(setAlignment(Qt::AlignRight)));

Any reply will be very appreciated

[mazurekwrc]

first of all it won't work because


The signals and slots mechanism is type safe: The signature of a signal must match the signature of the receiving slot.

so it's the reason why you get error

http://doc.trolltech.com/4.4/signalsandslots.html

[giusepped]

Don't understan:
the slot setAlignement is a slot of textEdit and act_alignright is a signal of a menu.
What am I missing?
G

[giusepped]

I solved. It seems the it's enough to call a callback from the connect function:

connect(act_alignright, SIGNAL(triggered(bool)), this, SLOT(right()));
connect(act_alignleft, SIGNAL(triggered(bool)), this, SLOT(left()));
connect(act_aligncenter, SIGNAL(triggered(bool)), this, SLOT(center()));


And then use setAlignment inside the callback.

[MaximA]

Don't understan:
the slot setAlignement is a slot of textEdit and act_alignright is a signal of a menu.
What am I missing?
G



connect(act_alignright, SIGNAL(triggered(bool)), // <---this is bool
textEdit,SLOT(setAlignment(Qt::AlignRight))); // <--this is not a bool, it is also a value and not a variable
You really need to read/understand: http://doc.trolltech.com/4.4/signalsandslots.html
hope it helps

[bugsstring]

I have problem with QTextEdit setAlignment()



#ifndef TEDIT_H
#define TEDIT_H

#include <QWidget>

class QToolBar;
class QAction;
class QTextEdit;

class TEdit : public QWidget
{
Q_OBJECT
public:
TEdit();
virtual ~TEdit();

private slots:
void makeBold();
void makeItalic();
void makeUnderline();
void setAlignLeft();
void setAlignCenter();
void setAlignRight();
private:

QToolBar *toolBar;

QAction *textBold;
QAction *textItalic;
QAction *textUnderline;
QAction *textLeft;
QAction *textCenter;
QAction *textRight;

QTextEdit *te;
};

#endif /* TEDIT_H_ */

implement


#include <QtGui>

#include "tedit.h"

TEdit::TEdit()
{
resize(800,600);
te = new QTextEdit;
toolBar = new QToolBar(this);

textBold = new QAction(QIcon(":images/format_text_bold.png"),tr("B"),this);
connect(textBold, SIGNAL(triggered()), this, SLOT(makeBold()));
textItalic = new QAction(QIcon(":images/format_text_italic.png"),tr("I"),this);
connect(textItalic, SIGNAL(triggered()), this, SLOT(makeItalic()));
textUnderline = new QAction(QIcon(":images/format_text_underline.png"),tr("U"),this);
connect(textUnderline, SIGNAL(triggered()), this, SLOT(makeUnderline()));

textLeft = new QAction(QIcon(":images/format_justify_left.png"),tr("Align Left"),this);
connect(textLeft, SIGNAL(triggered()), this, SLOT(setAlignLeft()));
textCenter = new QAction(QIcon(":images/format_justify_center.png"),tr("Align Center"),this);
connect(textLeft, SIGNAL(triggered()), this, SLOT(setAlignCenter()));
textRight = new QAction(QIcon(":images/format_justify_right.png"),tr("Align Right"),this);
connect(textLeft, SIGNAL(triggered()), this, SLOT(setAlignRight()));

toolBar->addAction(textBold);
toolBar->addAction(textItalic);
toolBar->addAction(textUnderline);
toolBar->addSeparator();
toolBar->addAction(textLeft);
toolBar->addAction(textCenter);
toolBar->addAction(textRight);

QVBoxLayout *ml = new QVBoxLayout;
ml->setMargin(1);
ml->setSpacing(0);
ml->addWidget(toolBar);
ml->addWidget(te);

setLayout(ml);
}

void TEdit::makeBold()
{
QTextCursor cursor = te->textCursor();
QTextCharFormat boldFormat;
if(cursor.charFormat().fontWeight()==QFont::Normal )
{
boldFormat.setFontWeight(QFont::Bold);
}
else
{
boldFormat.setFontWeight(QFont::Normal);
}

cursor.mergeCharFormat(boldFormat);

}

void TEdit::makeItalic()
{
QTextCursor cursor = te->textCursor();
QTextCharFormat italicFormat;
if(cursor.charFormat().fontItalic()==false)
{
italicFormat.setFontItalic(true);
}
else
{
italicFormat.setFontItalic(false);
}
cursor.mergeCharFormat(italicFormat);
}

void TEdit::makeUnderline()
{
QTextCursor cursor = te->textCursor();
QTextCharFormat underlineFormat;
if(cursor.charFormat().fontUnderline()==false)
{
underlineFormat.setFontUnderline(true);
}
else
{
underlineFormat.setFontUnderline(false);
}
cursor.mergeCharFormat(underlineFormat);
}

void TEdit::setAlignLeft()
{
QTextCursor cursor = te->textCursor();
QTextBlockFormat blockFmt;
if(!cursor.hasSelection())
{
cursor.select(QTextCursor::BlockUnderCursor);
}
blockFmt.setAlignment(Qt::AlignLeft);
cursor.mergeBlockFormat(blockFmt);
}
void TEdit::setAlignRight()
{
QTextCursor cursor = te->textCursor();
QTextBlockFormat blockFmt;
if(!cursor.hasSelection())
{
cursor.select(QTextCursor::BlockUnderCursor);
}
blockFmt.setAlignment(Qt::AlignRight);
cursor.mergeBlockFormat(blockFmt);
}
void TEdit::setAlignCenter()
{
QTextCursor cursor = te->textCursor();
QTextBlockFormat blockFmt;
if(!cursor.hasSelection())
{
cursor.select(QTextCursor::BlockUnderCursor);
}
blockFmt.setAlignment(Qt::AlignCenter);
cursor.mergeBlockFormat(blockFmt);
}
TEdit::~TEdit()
{
// TODO Auto-generated destructor stub
}

compilation done, no errors or warnings

but if i clicked on toolbar button to align left
text align to right, and alignCenter, alignRight, alignLeft do nothing
O_o

also i try


void TEdit::setAlignLeft()
{
te->setAlignment(Qt::AlignLeft);
}

but not work

[bugsstring]

sorry problem fixed )))
3 times textLeft )))