用Layout实现QToolBox效果

1、简介

最近要做一个项目，需要用到抽屉，但是抽屉有不能同时展开多个，所以自己用Layout实现下，记录在此，备忘。 主要思路是自定义一个类继承自QWidget，此类包含一个QVBoxLayout作为mainlayout，然后在mainlayout中顶部用一个按钮控件来作为抽屉的标题栏，用一个list保存addItem插入的控件，当点击顶部按钮时，把list保存的控件可视化状态改变，下面贴具体代码。

2、代码

MyToolBox.h：

#pragma once

#include <QWidget>
#include <QVBoxLayout>
#include <QList>
#include <QPushButton>

class MyToolBox :
public QWidget
{
Q_OBJECT
public:
MyToolBox(QIcon & icon, const QString &title, QWidget *parent = 0);
~MyToolBox(void);

void addItem(QWidget *item);

private slots:
void titleClicked();

private:
QVBoxLayout *m_mainLayout;
QList<QWidget *> m_itemList;
QPushButton *m_TitleBtn;
bool m_isVisable;
};

MyToolBox.cpp：

#include "MyToolBox.h"


MyToolBox::MyToolBox(QIcon & icon, const QString &title, QWidget *parent)
: QWidget(parent)
{
//初始化为非展开
m_isVisable = false;

m_mainLayout = new QVBoxLayout;
m_TitleBtn = new QPushButton(icon, title);

m_mainLayout->addWidget(m_TitleBtn);
m_mainLayout->addSpacing(2);
connect(m_TitleBtn, SIGNAL(clicked()), this, SLOT(titleClicked()));

m_mainLayout->setContentsMargins(0,0,0,0);
m_mainLayout->setSpacing(0);
setLayout(m_mainLayout);

setStyleSheet("QWidget{border: 0;}");
}

MyToolBox::~MyToolBox(void)
{
}

void MyToolBox::titleClicked()
{
for (int i=0; i<m_itemList.size(); ++i)
{
m_itemList[i]->setVisible(!m_itemList[i]->isVisible());
}

if (m_itemList.size() > 0)
m_isVisable = m_itemList[0]->isVisible();
}

void MyToolBox::addItem(QWidget *item)
{
m_itemList.append(item);
m_mainLayout->addWidget(item);

if (0 == m_itemList.size())
item->setVisible(false);
else
{
item->setVisible(m_isVisable);//m_itemList[0]->isVisible());
}
}

customtoolbox.h：

#ifndef CUSTOMTOOLBOX_H
#define CUSTOMTOOLBOX_H

#include <QtGui/QWidget>
#include <QVBoxLayout>
#include "MyToolBox.h"

class CustomToolBox : public QWidget
{
Q_OBJECT

public:
CustomToolBox(QWidget *parent = 0, Qt::WFlags flags = 0);
~CustomToolBox();


private:
MyToolBox * m_toolBox1;
MyToolBox * m_toolBox2;
MyToolBox * m_toolBox3;

QVBoxLayout *m_mainLayout;
};

#endif // CUSTOMTOOLBOX_H

customtoolbox.cpp：

#include "customtoolbox.h"

CustomToolBox::CustomToolBox(QWidget *parent, Qt::WFlags flags)
: QWidget(parent, flags)
{
m_mainLayout = new QVBoxLayout;
setLayout(m_mainLayout);
m_mainLayout->setContentsMargins(0,0,0,0);
m_mainLayout->setSpacing(0);

QString str = QString("delIcon.png");
QIcon icon(str);

m_toolBox1 = new MyToolBox(icon, "BTN1");
QPushButton *tmpBtn1 = new QPushButton("111");
QPushButton *tmpBtn2 = new QPushButton("222");
QPushButton *tmpBtn3 = new QPushButton("333");
m_toolBox1->addItem(tmpBtn1);
m_toolBox1->addItem(tmpBtn2);
m_toolBox1->addItem(tmpBtn3);

m_toolBox2 = new MyToolBox(icon, "BTN2");
QPushButton *tmpBtn11 = new QPushButton("111__");
QPushButton *tmpBtn22 = new QPushButton("222__");
m_toolBox2->addItem(tmpBtn11);
m_toolBox2->addItem(tmpBtn22);

m_toolBox3 = new MyToolBox(icon, "BTN3");
QPushButton *tmpBtn111 = new QPushButton("__111__");
QPushButton *tmpBtn222 = new QPushButton("__222__");
m_toolBox3->addItem(tmpBtn111);
m_toolBox3->addItem(tmpBtn222);

m_mainLayout->addWidget(m_toolBox1);
m_mainLayout->addWidget(m_toolBox2);
m_mainLayout->addWidget(m_toolBox3);
m_mainLayout->addStretch();

setGeometry(300, 300, 100, 400);
}

CustomToolBox::~CustomToolBox()
{

}