QT编写窗口插件实现调用窗口的自适应

#ifndef TEST_H
#define TEST_H
 
#include "test_global.h"
#include "testwidget.h"
 
class TEST_EXPORT test
{
public:
 test(); 
 ~test();
 
private:
 
};
 
 
#ifdef __cplusplus
extern "C" {          // we need to export the C interface
#endif
 void TEST_EXPORT PluginStart(void *lParentWidget);
 void TEST_EXPORT PluginClose(bool bCompleteClose);
 void TEST_EXPORT PluginUpdate(void *upDate);
 TEST_EXPORT const char*  PluginFunction(const char* input);
 
 
#ifdef __cplusplus
}
#endif
 
#endif // TEST_H

#include "test.h"
 
testWidget *g_pTestWidget = NULL;
test::test()
{
 
}
 
test::~test()
{
 
}
 
void TEST_EXPORT PluginStart(void *lParentWidget)
{
 if (NULL == g_pTestWidget)
 {
  g_pTestWidget = new testWidget();
 }
 
 if (NULL != lParentWidget)
 {
  g_pTestWidget->setParent((QDialog *)lParentWidget);
  g_pTestWidget->raise();
  g_pTestWidget->setGeometry(0, 0, ((QDialog *)lParentWidget)->width(), ((QDialog *)lParentWidget)->height());
 }
 g_pTestWidget->show();
}
 
void TEST_EXPORT PluginClose(bool bCompleteClose)
{
 if (g_pTestWidget != NULL)
 {
  if (bCompleteClose)
  {
   g_pTestWidget->hide();
  }
  else
  {
   g_pTestWidget->close();
   delete g_pTestWidget;
   g_pTestWidget = NULL;
  }
 }
}
 
void TEST_EXPORT PluginUpdate(void *upDate)
{
 
}
 
TEST_EXPORT const char* PluginFunction(const char* input)
{
 return input;
}

#ifndef QRESIZINGWIDGET_H
#define QRESIZINGWIDGET_H
 
#pragma once
 
#include <QWidget>
 
class QResizingWidget : public QWidget
{
    Q_OBJECT
public:
    explicit QResizingWidget(QWidget *parent = 0);
    virtual ~QResizingWidget();
 
protected:
    virtual void paintEvent(QPaintEvent *sEvent);
 
    virtual void resizeEvent(QResizeEvent* sEvent);
 
};
 
#endif

#include "qresizingwidget.h"
#include <QResizeEvent>
#include <QStyleOption>
#include <QPainter>
 
QResizingWidget::QResizingWidget(QWidget *parent /*= 0*/)
    : QWidget(parent)
{
}
 
QResizingWidget::~QResizingWidget()
{
}
 
void QResizingWidget::resizeEvent(QResizeEvent* sEvent)
{
 QWidget::resizeEvent(sEvent);
 
 foreach(auto itr, children())
 {
  if (itr->isWidgetType())
  {
   itr->setProperty("geometry", QRectF(0, 0, geometry().width(), geometry().height()));
  }
 }
}
 
void QResizingWidget::paintEvent(QPaintEvent *sEvent)
{
 /*
 发现 继承自QWidget的自定义类 ，使用setStyleSheet无效，
 如果删除头文件中的 Q_OBJECT，setStyleSheet生效，
 但不用OBJECT 就无法所使用signal and slot，
 最后找到解决办法，继承自QWidget的自定义类中，重载 paintEvent方法，
 并加入如下代码：
 */
    QStyleOption opt;
    opt.init(this);
    QPainter p(this);
    style()->drawPrimitive(QStyle::PE_Widget, &opt, &p, this);
 QWidget::paintEvent(sEvent);
}

#include "testdll.h"
#include <QLibrary>
#include <QDebug>
 
 
 
typedef void (*fun_start)(void *lparentWidget);
typedef void (*fun_close)(bool bCompleteClose);
typedef void (*fun_update)(const char *upDate);
typedef const char* (*fun_callback)(void *input);
 
fun_start g_Start = NULL;
fun_close g_End = NULL;
 
QLibrary myDll;
 
testDll::testDll(QWidget *parent)
 : QWidget(parent)
{
 ui.setupUi(this);
 
 connect(ui.load, SIGNAL(clicked()), this, SLOT(load()));
 connect(ui.unload, SIGNAL(clicked()), this, SLOT(unload()));
}
 
testDll::~testDll()
{
 
}
 
void testDll::load()
{
 myDll.setFileName("test.dll");
 if (myDll.load())
 {
  if (!myDll.isLoaded())
  {
   qDebug() << "load error!";
  }
  else
  {
   g_Start = (fun_start)myDll.resolve("PluginStart"); 
   qDebug() << g_Start;
   qDebug() << "load success!";
   g_Start(ui.widget);
  }
 }
}
 
void testDll::unload()
{
 if (myDll.isLoaded())
 {
  g_End = (fun_close)myDll.resolve("PluginClose"); 
  g_End(false);
  myDll.unload();
 }
}