Qt Table 小部件。如何同时设置垂直 header 和水平 header 的 meaning/title？

Question

我知道如何将文本标签设置到行或列中 headers。但我想做这样的事情：

http://i.stack.imgur.com/eMM6U.jpg

我找不到任何关于如何在红色圆圈内做这件事的信息。我开始相信这不能用 QTableWidget 来完成。

谢谢 ;)

Answer 1

我认为标准 headers (QHeaderView) because of:

是不可能的

Note: Each header renders the data for each section itself, and does not rely on a delegate. As a result, calling a header's setItemDelegate() function will have no effect.

所以你需要忘记它并禁用它，你应该实现你自己的 headers（设置你的颜色，你的文本等等），但我当然会帮助 meaning/title。我通过下一个项目委托实现了这一点：

.h:

#ifndef ITEMDELEGATEPAINT_H
#define ITEMDELEGATEPAINT_H

#include <QStyledItemDelegate>

class ItemDelegatePaint : public QStyledItemDelegate
{
    Q_OBJECT
public:
    explicit ItemDelegatePaint(QObject *parent = 0);
    ItemDelegatePaint(const QString &txt, QObject *parent = 0);


protected:
    void paint( QPainter *painter,
                const QStyleOptionViewItem &option,
                const QModelIndex &index ) const;
    QSize sizeHint( const QStyleOptionViewItem &option,
                    const QModelIndex &index ) const;
    QWidget* createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const;
    void setEditorData(QWidget * editor, const QModelIndex & index) const;
    void setModelData(QWidget * editor, QAbstractItemModel * model, const QModelIndex & index) const;
    void updateEditorGeometry(QWidget * editor, const QStyleOptionViewItem & option, const QModelIndex & index) const;

signals:

public slots:

};

#endif // ITEMDELEGATEPAINT_H

但是所有这些方法在这里都不是很有用，你可以通过一些具体的操作自己实现它，我将向你展示主要方法 - paint()

void ItemDelegatePaint::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    if(index.row() == 0 && index.column() == 0)
    {
        QRect source1 = QRect(option.rect.topLeft(),option.rect.size()/2);
        QRect source2 = QRect(option.rect.topLeft(),option.rect.size()/2);

        painter->drawLine(option.rect.topLeft(),option.rect.bottomRight());

        source1.moveTopLeft(source1.topLeft() += QPoint(source1.size().width(),0));
        painter->drawText(source1,"agent reagent");

        source2.moveBottomLeft(source2.bottomLeft() += QPoint(0,source2.size().height()));
        painter->drawText(source2,"hallide ion");
    }

    else
    {
        QStyledItemDelegate::paint(painter,option,index);
    } 
}

这段代码展示了主要思想，它不是最终版本，但你应该自己完成所有这些具体的事情。当然这种做法不是很容易，你可以直接创建图片并设置为单元格，但这样的话图片的可伸缩性就不好了。如果用户调整一些 headers 的大小，我的代码可以正常工作。为了证明，请查看不同尺寸的屏幕截图。

Answer 2

如果文本元素如此处所示

就足够了，可以使用标准 header 和我在评论中发布的 link 中的解决方案来完成：

from PyQt5 import QtCore, QtWidgets

class MyTableWidget(QtWidgets.QTableWidget):
    def __init__(self, parent = None):
        QtWidgets.QTableWidget.__init__(self, parent)
        self.setRowCount(4)
        self.setColumnCount(5)
        self.items = []
        self.items.append(['white ppt','no reaction', 'no reaction', 'no reaction', 'no reaction'])
        self.items.append(['no reaction','white ppt', 'dissolves', 'dissolves', 'no reaction'])
        self.items.append(['no reaction','pale yellow\nprecipitate', 'dissolves\npartly', 'dissolves', 'no reaction'])
        self.items.append(['no reaction','yellow ppt', 'does not\ndissolve', 'does not\ndissolve', 'turns\nblue'])
        self.horizontalHeader().setFixedHeight(90)
        self.verticalHeader().setFixedWidth(120)
        self.hh = ['Ca(NO\u2083)\u2082', 'AgNO\u2083','AgNO\u2083\n+\nNH\u2083','AgNO\u2083\n+\nNa\u2083S\u2082O\u2083','Starch\n+\nNaOCl']
        self.vh = ['NaF', 'NaCl', 'NaBr or KBR', 'NaJ']

        self.addItems()
        self.addHeaderItems()
        # text in cornerButton
        btnTxt = '{: >15}\n{: >19}\n{:<}\n{:<}'.format('reagent', '\u21D2','halide', 'ion \u21D3')

        # add cornerbutton from http://whosebug.com/questions/22635867/is-it-possible-to-set-the-text-of-the-qtableview-corner-button
        btn = self.findChild(QtWidgets.QAbstractButton)
        btn.setText(btnTxt)
        btn.installEventFilter(self)

        opt = QtWidgets.QStyleOptionHeader()
        opt.text = btn.text()    
        # end cornerbutton 

    def addItems(self):  
        for r in range(0,len(self.items)):
            for c in range(0,len(self.items[r])):
                item = QtWidgets.QTableWidgetItem()
                item.setText(self.items[r][c])
                self.setItem(r,c,item)

    def addHeaderItems(self):
        for i in range(0,len(self.hh)):
            item = QtWidgets.QTableWidgetItem()
            item.setText(self.hh[i])
            self.setHorizontalHeaderItem(i,item)
            self.setColumnWidth(i,150)
        for i in range(0,len(self.vh)):
            item = QtWidgets.QTableWidgetItem()
            item.setText(self.vh[i])
            self.setVerticalHeaderItem(i,item)
            self.setRowHeight(i,60)

        # eventfilter from http://whosebug.com/questions/22635867/is-it-possible-to-set-the-text-of-the-qtableview-corner-button
    def eventFilter(self, obj, event):
        if event.type() != QtCore.QEvent.Paint or not isinstance(
            obj, QtWidgets.QAbstractButton):
            return False

        # Paint by hand (borrowed from QTableCornerButton)
        opt = QtWidgets.QStyleOptionHeader()
        opt.initFrom(obj)
        styleState = QtWidgets.QStyle.State_None
        if obj.isEnabled():
            styleState |= QtWidgets.QStyle.State_Enabled
        if obj.isActiveWindow():
            styleState |= QtWidgets.QStyle.State_Active
        if obj.isDown():
            styleState |= QtWidgets.QStyle.State_Sunken
        opt.state = styleState
        opt.rect = obj.rect()
        # This line is the only difference to QTableCornerButton
        opt.text = obj.text()
        opt.position = QtWidgets.QStyleOptionHeader.OnlyOneSection
        painter = QtWidgets.QStylePainter(obj)
        painter.drawControl(QtWidgets.QStyle.CE_Header, opt)

        return True

如果 painter.drawControl()-method 被任何其他 painter.draw...()-method 任意元素替换，包括。可以在 cornerButton 上绘制图形。

Qt Table 小部件。如何同时设置垂直 header 和水平 header 的 meaning/title？

Qt Table widget. How to set the meaning/title for vertical header and horizontal header together?

c++

qt

qtablewidget