qt - 两个方向的QSplitter

Question

我想制作一个包含四个使用 QSplitter 可调整大小的小部件的应用程序。在这个应用程序中，我希望在调整拆分器大小时调整所有四个小部件的大小。我通过让水平分离器包含两个垂直分离器来实现这一点。然而，这种方式垂直分割只涉及两个小部件，而不是全部四个。有没有办法解决这个“矩阵”分裂？

Answer 1

您是否尝试过将一个的splitterMoved(int,int)信号连接到另一个的moveSplitter(int,int)插槽？

QObject::connect(ui->upperSplitter, SIGNAL(splitterMoved(int,int), ui->lowerSplitter, SLOT(moveSplitter(int,int));
QObject::connect(ui->lowerSplitter, SIGNAL(splitterMoved(int,int), ui->upperSplitter, SLOT(moveSplitter(int,int));

http://doc.qt.io/qt-5/qsplitter.html#splitterMoved

http://doc.qt.io/qt-5/qsplitter.html#moveSplitter

或者您可能需要查看 QSplitterHandle 类。

http://doc.qt.io/qt-5/qsplitterhandle.html

希望有帮助。

Answer 2

另一个答案的另一种可能性是手动布局，在四个小部件的交叉处有一个花哨的单个调整大小手柄。

应该使用鼠标事件和 setGeometry 调用通过几行代码来完成。

像这样（工作示例）：

（只需添加一个绘制事件以在中心绘制一个您喜欢的手柄）

该死的..显然是按钮标签的复制粘贴错误；）我更正了修复代码...

FourWaySplitter::FourWaySplitter(QWidget *parent) :
   QWidget(parent),
   ui(new Ui::FourWaySplitter), m_margin(5)
{
   ui->setupUi(this);

   m_ul = new QPushButton("Upper Left", this);
   m_ur = new QPushButton("Upper Right", this);
   m_ll = new QPushButton("Lower Left", this);
   m_lr = new QPushButton("Lower Right", this);

   setFixedWidth(500);
   setFixedHeight(400);

   // of course, the following needs to be updated in a sensible manner
   // when 'this' is not of fixed size in the 'resizeEvent(QResizeEvent*)' handler
   m_handleCenter = rect().center();

   m_ul->setGeometry(QRect(QPoint(m_margin,m_margin), m_handleCenter - QPoint(m_margin, m_margin)));
   m_ur->setGeometry(QRect(QPoint(width()/2 + m_margin, m_margin), QPoint(width() - m_margin, height()/2 - m_margin)));
   m_ll->setGeometry(QRect(QPoint(m_margin, height()/2 + m_margin), QPoint(width()/2 - m_margin, height() - m_margin)));
   m_lr->setGeometry(QRect(QPoint(width()/2 + m_margin, height()/2 + m_margin), QPoint(width() - m_margin, height() - m_margin)));
}

void FourWaySplitter::mouseMoveEvent(QMouseEvent * e)
{
   if(m_mouseMove) {
      QRect newGeo = m_ul->geometry();
      newGeo.setBottomRight(e->pos() + QPoint(-m_margin, -m_margin));
      m_ul->setGeometry(newGeo);

      newGeo = m_ur->geometry();
      newGeo.setBottomLeft(e->pos() + QPoint(+m_margin, -m_margin));
      m_ur->setGeometry(newGeo);

      newGeo = m_ll->geometry();
      newGeo.setTopRight(e->pos() + QPoint(-m_margin, + m_margin));
      m_ll->setGeometry(newGeo);

      newGeo = m_lr->geometry();
      newGeo.setTopLeft(e->pos() + QPoint(+m_margin, + m_margin));
      m_lr->setGeometry(newGeo);
   }
}

void FourWaySplitter::mousePressEvent(QMouseEvent * e)
{
   if((e->pos() - m_handleCenter).manhattanLength() < 10) {
      m_mouseMove = true;
   }
}

void FourWaySplitter::mouseReleaseEvent(QMouseEvent * e)
{
   m_handleCenter = rect().center();
   m_mouseMove    = false;
}

FourWaySplitter::~FourWaySplitter()
{
   delete ui;
}