How Can I set text orientation in QTextTable vertical?

best_iyke

I insert some text in QTextTable in QTextEdit using QTextCursor.
But I want the text in the table header to be set vertically oriented and I don't know how to achieve this. I have make some search, and I could not get any guide on it. Please someone should help me with some code or guide.
Thanks in advance for the assistance.

jsulm

@best_iyke I guess Qt::AlignVCenter is your friend:
http://doc.qt.io/qt-5/qtexttableformat.html#setAlignment
http://doc.qt.io/qt-5/qtexttable.html#setFormat

J.Hilk

@best_iyke from the title of this thread I assume, you want to rotate your text by 90° to display vertically ?

than the item property rotation should be what you're looking for.

best_iyke

@jsulm void GwWidget::createTable()
{
QTextEdit *textEdit = new QTextEdit;
setCentralWidget(textEdit);

QTextCursor textCursor = textEdit->textCursor();

QTextTableFormat tf;
tf.setAlignment(Qt::AlignVCenter);

QTextTable *table = textCursor.insertTable(5,5);
table->setFormat(tf);

QTextTableCell cell1 = table->cellAt(0,0);
textCursor = cell1.firstCursorPosition();
textCursor.insertText("Column1");

QTextTableCell cell2 = table->cellAt(0,1);
textCursor = cell2.firstCursorPosition();
textCursor.insertText("Column1");

QTextTableCell cell3 = table->cellAt(0,2);
textCursor = cell3.firstCursorPosition();
textCursor.insertText("Column3");

QTextTableCell cell4 = table->cellAt(0,3);
textCursor = cell4.firstCursorPosition();
textCursor.insertText("Column4");

QTextTableCell cell5 = table->cellAt(0,4);
textCursor = cell5.firstCursorPosition();
textCursor.insertText("Column5");

}

Qt::AlignVCenter does not change the orientation of the text (i.e. rotating the text by 90 degree) in the table cells.

best_iyke

@J.Hilk This is exactly what i want to achieve, but I don't know how to implement it. The link is QML doc. I am using c++. Please I need help. Thanks.

From my search findings is like I have to create custom QTextObject and rotate the text by 90 degree. But I don't know how to go about it.
The svgTextObject example in Qt examples did not give me a good guide on how to do it.

J.Hilk

@best_iyke
uh, sry I mentioned QML; because its super easy to do there, I don't know of an easy way to implent this in QWidgets.

The only way I know of would be to create a custom widget reimplementing the paintevent and than:

void CustomWidget::paintEvent(QPaintEvent*)
{
    QPainter painter(this);
    painter.translate(0,sizeHint().height());
    painter.rotate(90);

    painter.drawText(QRect (QPoint(0,0),sizeHint),Qt::AlignCenter,text());
}

example taken from here, interesting stackoverflow thread, you should read through it.

best_iyke

I have been able to create a new text object but it is the rotated text is truncated. Here is the code:

#ifndef WIDGET_H
#define WIDGET_H

#include <QMainWindow>
#include <QTextCursor>

class QTextEdit;

class GwWidget : public QMainWindow
{
Q_OBJECT

public:
GwWidget(QWidget *parent = 0);
~GwWidget();
enum { VTextCharFormat = QTextFormat::UserFormat + 1 };
enum TxetCharProperties{ VTextCharPropertyId = 1 };

void createTable();

private slots:
void insertTextObject(const QString &string, QTextTable *table, int cellRow, int cellCol);

private:
void setupTextObject();
QTextEdit *textEdit;
QTextCursor textCursor;
};

#endif // WIDGET_H

#include "GwWidget.h"
#include <QTextEdit>
#include <QTextTable>
#include "GwTextObject.h"

GwWidget::GwWidget(QWidget *parent)
: QMainWindow(parent)
{
textEdit = new QTextEdit;
setCentralWidget(textEdit);
textCursor = textEdit->textCursor();

setupTextObject();
createTable();

}

GwWidget::~GwWidget()
{

}

void GwWidget::createTable()
{
QTextTableFormat tf;
tf.setAlignment(Qt::AlignVCenter);
tf.setCellSpacing(0);

QTextTable *table = textCursor.insertTable(5,5);
table->setFormat(tf);



insertTextObject("Column0", table, 0, 0);

QTextTableCell cell1 = table->cellAt(0,1);
textCursor = cell1.firstCursorPosition();
textCursor.insertText("Column1");

QTextTableCell cell2 = table->cellAt(0,2);
textCursor = cell2.firstCursorPosition();
textCursor.insertText("Column2");

QTextTableCell cell3 = table->cellAt(0,3);
textCursor = cell3.firstCursorPosition();
textCursor.insertText("Column3");

QTextTableCell cell4 = table->cellAt(0,4);
textCursor = cell4.firstCursorPosition();
textCursor.insertText("Column4");

}

void GwWidget::insertTextObject(const QString &string, QTextTable *table, int cellRow, int cellCol)
{
QTextCharFormat charFormat;

charFormat.setObjectType(VTextCharFormat);
charFormat.setProperty(VTextCharPropertyId, QVariant(string));

QTextTableCell cell5 = table->cellAt(cellRow, cellCol);
textCursor = cell5.firstCursorPosition();
textCursor.insertText(QString(QChar::ObjectReplacementCharacter), charFormat);

}

void GwWidget::setupTextObject()
{
QObject *textObject = new GwTextObject;
textObject->setParent(this);
textEdit->document()->documentLayout()->registerHandler(VTextCharFormat, textObject);
}

best_iyke

@best_iyke
class GwTextObject : public QObject, public QTextObjectInterface
{
Q_OBJECT
Q_INTERFACES(QTextObjectInterface)
public:
QSizeF intrinsicSize(QTextDocument *doc, int posInDocument,
const QTextFormat &format) override;

void drawObject(QPainter *painter, const QRectF &rect, QTextDocument *doc,
                int posInDocument, const QTextFormat &format) override;

};

QSizeF GwTextObject::intrinsicSize(QTextDocument */doc/, int /posInDocument/, const QTextFormat &format)
{
QString str = format.property(GwWidget::VTextCharPropertyId).toString();
int strSize = str.size();
return QSizeF(strSize + 10, strSize + 80);
}

void GwTextObject::drawObject(QPainter *painter, const QRectF &rect,
QTextDocument */doc/, int /posInDocument/, const QTextFormat &format)
{
QString text = format.property(GwWidget::VTextCharPropertyId).toString();

QFont font = painter->font();
font.setPointSize(12);
font.setFamily("Algerian");
font.setWeight(QFont::DemiBold);
painter->setFont(font);
painter->translate(rect.width() -15, rect.height());
painter->rotate(-90);
painter->drawText(rect, text);

}