1

假设我有一个QHBoxLayout2 QTextEdits 并且在它们之间有一个带有向右箭头的按钮。当您单击按钮时，右侧会QTextEdit通过移动左边框逐渐关闭，直到与右侧边框相遇。同时，左边的右边边界QTextEdit代替右边QTextEdit释放的位置。并且在按下按钮后，系统的状态又回到了前一种状态。

编辑：为了组织这个，我做了以下事情：

1）在头文件中：

class MyWidget : public QWidget
{

    Q_OBJECT

    QTextEdit       *m_textEditor1;
    QTextEdit       *m_textEditor2;
    QPushButton     *m_pushButton;
    QHBoxLayout     *m_layout;
    int              m_deltaX;

public:

    MyWidget(QWidget * parent = 0);


    ~MyWidget(){}


private slots:
    void closeOrOpenTextEdit2(bool isClosing);


};

2）在源文件中：

MyWidget::MyWidget(QWidget * parent):QWidget(parent),m_deltaX(0)
{


  m_pushButton = new QPushButton(this);
  m_pushButton->setText(">");
  m_pushButton->setCheckable(true);
  connect(m_pushButton, SIGNAL(clicked(bool)), this, SLOT(closeOrOpenTextEdit2(bool)));

  m_textEditor1 = new QTextEdit(this);
  m_textEditor1->setText("AAAAA AAAAAAAAAAA AAAAAAAAAAA  AAAAAAA AAAAAAAAAAA AAAAAAAAAAA  AA");

  m_textEditor2 = new QTextEdit(this);


  m_layout = new QHBoxLayout;
  m_layout->addWidget(m_textEditor1);
  m_layout->addWidget(m_pushButton);
  m_layout->addWidget(m_textEditor2);

  setLayout(m_layout);
}

void MyWidget::closeOrOpenTextEdit2(bool isClosing)
{
    QPropertyAnimation *animation1 = new QPropertyAnimation(m_textEditor2, "geometry");
    QPropertyAnimation *animation2 = new QPropertyAnimation(m_pushButton, "geometry");
    QPropertyAnimation *animation3 = new QPropertyAnimation(m_textEditor1, "geometry");

    if(isClosing) //close the second textEdit
    {
        m_pushButton->setText("<");

        QRect te2_1 = m_textEditor2->geometry();
        m_deltaX = te2_1.width()-3;
        QRect te2_2(te2_1.x()+m_deltaX, te2_1.y(), 3 ,te2_1.height());

        QRect pb_1 = m_pushButton->geometry();
        QRect pb_2(pb_1.x()+m_deltaX, pb_1.y(), pb_1.width() ,pb_1.height());

        QRect te1_1 = m_textEditor1->geometry();
        QRect te1_2(te1_1.x(), te1_1.y(), te1_1.width()+m_deltaX, te1_1.height());


         //animation->setDuration(10000);
         animation1->setStartValue(te2_1);
         animation1->setEndValue(te2_2);

         animation2->setStartValue(pb_1);
         animation2->setEndValue(pb_2);

         animation3->setStartValue(te1_1);
         animation3->setEndValue(te1_2);
    }
    else //open
    {
       m_pushButton->setText(">");

       QRect te2_1 = m_textEditor2->geometry();
       QRect te2_2(te2_1.x()-m_deltaX, te2_1.y(), 3+m_deltaX ,te2_1.height());

       QRect pb_1 = m_pushButton->geometry();
       QRect pb_2(pb_1.x()-m_deltaX, pb_1.y(), pb_1.width() ,pb_1.height());

       QRect te1_1 = m_textEditor1->geometry();
       QRect te1_2(te1_1.x(), te1_1.y(), te1_1.width()-m_deltaX, te1_1.height());


        //animation->setDuration(10000);
        animation1->setStartValue(te2_1);
        animation1->setEndValue(te2_2);

        animation2->setStartValue(pb_1);
        animation2->setEndValue(pb_2);

        animation3->setStartValue(te1_1);
        animation3->setEndValue(te1_2);

    }
    animation1->start();
    animation2->start();
    animation3->start();
}

编辑：

我有以下问题：

当我关闭第二个QTextEdit（通过单击按钮）并调整大小时MyWidget，它会QTextEdit恢复其状态（但它当然应该保持关闭状态）。我怎么解决这个问题？

请给我一个代码片段。

4

3 回答 3

3

1）您可以用垂直布局替换您的按钮，将按钮放在此布局内，最后在按钮下方添加一个垂直间隔（与布局相同）。

...

QVBoxLayout* m_buttonLayout = new QVBoxLayout();

m_layout = new QHBoxLayout();
m_layout->addWidget(m_textEditor1);
m_layout->addLayout(m_buttonLayout);
m_layout->addWidget(m_textEditor2);

m_buttonLayout->addWidget(m_pushButton);
m_buttonLayout->addItem( new QSpacerItem(1, 1, QSizePolicy::Minimum, QSizePolicy::Expanding) );

2）我猜你可以（并且应该）为小部件的maximumSize（或只是maximumWidth）属性设置动画，并让布局负责计算实际的几何形状。这也将简化您的计算。例如

QPropertyAnimation *animation1 = new QPropertyAnimation(m_textEditor2, "maximumWidth");
QPropertyAnimation *animation2 = new QPropertyAnimation(m_textEditor, "maximumWidth");

if (isClosing)
{
    int textEdit2_start = m_textEditor2->maximumWidth();
    int textEdit2_end = 0;

    int textEdit_start = m_textEditor->maximumWidth();
    int textEdit_end = textEdit_start + textEdit2_start;

    animation1->setStartValue(textEdit2_start);
    ...
}

此外，现在您根本不必为按钮几何图形设置动画（假设您已为其设置了固定大小）。

PS。我没有编译代码，所以可能会有小错误，但你应该明白。

于 2010-07-20T11:58:15.240 回答
3

Qt 的动画框架听起来是个不错的起点。您可以尝试按照他们的教程进行调整，以适应您的用例。我已经使用过它，而且看起来很简单。

于 2010-07-19T18:46:23.027 回答
2

这是我想要的：

头文件

class MyWidget : public QWidget
{

    Q_OBJECT

    QTextEdit       *m_textEditor1;
    QTextEdit       *m_textEditor2;
    QPushButton     *m_pushButton;
    QHBoxLayout     *m_layout;
    QVBoxLayout     *m_buttonLayout;

    int              m_deltaX;
    bool             m_isClosed;


public:

    MyWidget(QWidget * parent = 0);
    ~MyWidget(){}

    void resizeEvent( QResizeEvent * event );

private slots:
    void closeOrOpenTextEdit2(bool isClosing);

};

源文件

MyWidget::MyWidget(QWidget * parent):QWidget(parent),m_deltaX(0)
{

  m_pushButton = new QPushButton(this);
  m_pushButton->setText(">");
  m_pushButton->setCheckable(true);
  m_pushButton->setFixedSize(16,16);
  connect(m_pushButton, SIGNAL(clicked(bool)), this, SLOT(closeOrOpenTextEdit2(bool)));

  m_textEditor1 = new QTextEdit(this);
  m_textEditor1->setText("AAAAA AAAAAAAAAAA AAAAAAAAAAA  AAAAAAA AAAAAAAAAAA AAAAAAAAAAA  AA");

  m_textEditor2 = new QTextEdit(this);

  m_buttonLayout = new QVBoxLayout();
  m_buttonLayout->addWidget(m_pushButton);
  m_buttonLayout->addItem( new QSpacerItem(1, 1, QSizePolicy::Minimum, QSizePolicy::Expanding) );


  m_layout = new QHBoxLayout;
  m_layout->addWidget(m_textEditor1, 10);
  m_layout->addSpacing(15);
  m_layout->addLayout(m_buttonLayout);
  m_layout->setSpacing(0);
  m_layout->addWidget(m_textEditor2, 4);

  setLayout(m_layout);
  resize(800,500);
}

void MyWidget::closeOrOpenTextEdit2(bool isClosing)
{
    m_isClosed = isClosing;
    QPropertyAnimation *animation1 = new QPropertyAnimation(m_textEditor2, "maximumWidth");

    if(isClosing) //close the second textEdit
    {
        m_textEditor2->setMaximumWidth(m_textEditor2->width());

        int textEdit2_start = m_textEditor2->maximumWidth();

        m_deltaX = textEdit2_start;
        int textEdit2_end = 3;



        animation1->setDuration(500);
        animation1->setStartValue(textEdit2_start);
        animation1->setEndValue(textEdit2_end);


        m_pushButton->setText("<");

    }
    else //open
    {


        int textEdit2_start = m_textEditor2->maximumWidth();
        int textEdit2_end = m_deltaX;


        animation1->setDuration(500);
        animation1->setStartValue(textEdit2_start);
        animation1->setEndValue(textEdit2_end);


        m_pushButton->setText(">");

    }

    animation1->start();

}


void MyWidget::resizeEvent( QResizeEvent * event )
{
    if(!m_isClosed)
        m_textEditor2->setMaximumWidth( QWIDGETSIZE_MAX );
}
于 2010-07-25T08:10:09.627 回答