Qt QTabWidget修改tabBar方向

感谢 https://blog.csdn.net/skyztttt/article/details/52448992

QTabWidget默认的 Tab方向是水平的，从属性设置更改 tabPosition=west后的效果如下图

最终效果图

#ifndef MH1_H
#define MH1_H#include <QMainWindow>
#include <QPainter>
#include <QProxyStyle>
#include <QStyleOptionTab>class CustomTabStyle : public QProxyStyle
{
public:/* sizeFromContents*  用于设置Tab标签大小* 1.获取原标签大小* 2.宽高切换* 3.强制宽高* 4.return* */QSize sizeFromContents(ContentsType type, const QStyleOption *option,const QSize &size, const QWidget *widget) const{QSize s = QProxyStyle::sizeFromContents(type, option, size, widget);if (type == QStyle::CT_TabBarTab) {s.transpose();s.rwidth() = 120; // 设置每个tabBar中item的大小s.rheight() = 44;}return s;}/* drawControl*  画控件* 1.过滤CE_TabBarTabLabel* 2.选择状态下的背景绘制*      a.获取Rect*      b.保存旧的画笔*      c.设置新画笔*      d.画 Rect*      e.恢复旧的画笔* 3.设定Text对齐及选中/非选中状态下的Text颜色* 4.过滤CE_TabBarTab，对其进行绘制* */void drawControl(ControlElement element, const QStyleOption *option, QPainter *painter, const QWidget *widget) const{if (element == CE_TabBarTabLabel) {if (const QStyleOptionTab *tab = qstyleoption_cast<const QStyleOptionTab *>(option)){QRect allRect = tab->rect;if (tab->state & QStyle::State_Selected) {painter->save();painter->setPen(0x89cfff);painter->setBrush(QBrush(0x89cfff));QRect nrct = allRect.adjusted(6, 6, -6, -6);painter->drawRect(allRect.adjusted(6, 6, -6, -6));painter->restore();}QTextOption option;option.setAlignment(Qt::AlignCenter);if (tab->state & QStyle::State_Selected) {painter->setPen(0xf8fcff);}else {painter->setPen(0x5d5d5d);}painter->drawText(allRect, tab->text, option);return;}}if (element == CE_TabBarTab) {QProxyStyle::drawControl(element, option, painter, widget);}}
};#endif // MH1_H