QT调用COM组件方式示例: https://blog.csdn.net/xiaolong1126626497/article/details/113127300?spm=1001.2014.3001.5501
VS2017+QT创建COM组件示例: https://blog.csdn.net/xiaolong1126626497/article/details/112556866
QT创建的COM组件里,类里提供的公共槽函数可以直接被其他语言调用,提供信号可以被其他语言绑定为事件,数据通信非常方便。
比如: QT如果调用已经注册的COM组件,可以绑定COM组件提供的信号到自己的指定的槽函数。
C#如果调用已经注册的COM组件,可以绑定COM组件提供的信号(事件) (QT生成的COM组件,信号传递出来的参数,在C#里接收回调函数里,从事件e结构里.号可以直接取出数据)。
class ComPluginTest : public QWidget, public QAxBindable
{
Q_OBJECT
public:
ComPluginTest(QWidget *parent = Q_NULLPTR);
public slots: //槽函数声明标志
void pushButton_int_clicked(); //声明槽函数
void pushButton_double_clicked(); //声明槽函数
void pushButton_string_clicked();
void pushButton_string1_clicked();
void pushButton_string2_clicked();
void pushButton_string3_clicked();
QString VersionNumber();
signals:
void signal_value_str1(const QString& str); //信号声明
void signal_value_str2(QString str); //信号声明
void signal_value_str3(QString str); //信号声明
void signal_value_string(QString &str); //信号声明
void signal_value_int(int); //信号声明
void signal_value_double(double); //信号声明
private:
Ui::ComPluginTestClass ui;
};
ActiveQt框架将属性和公共插槽公开为ActiveX属性和方法,将信号公开为ActiveX事件,并在Qt数据类型和等效的COM数据类型之间进行转换。
Qt支持作为COM组件信号和槽函数参数的数据类型如下:
Qt data type |
COM property |
bool |
VARIANT_BOOL |
BSTR |
|
int |
int |
uint |
unsigned int |
double |
double |
CY |
|
CY |
|
OLE_COLOR |
|
DATE |
|
DATE |
|
DATE |
|
IFontDisp* |
|
IPictureDisp* |
|
VARIANT |
|
QVariantList (same as QList<QVariant>) |
SAFEARRAY(VARIANT) |
SAFEARRAY(BSTR) |
|
SAFEARRAY(BYTE) |
|
User defined type |
|
User defined type |
|
User defined type |
The Qt data types that are supported for parameters in signals and slots are:
Qt data type |
COM parameter |
bool |
[in] VARIANT_BOOL |
bool& |
[in, out] VARIANT_BOOL* |
[in] BSTR |
|
[in, out] BSTR* |
|
[in, out] BSTR* |
|
int |
[in] int |
int& |
[in,out] int |
uint |
[in] unsigned int |
uint& |
[in, out] unsigned int* |
double |
[in] double |
double& |
[in, out] double* |
[in] OLE_COLOR |
|
[in, out] OLE_COLOR* |
|
[in] DATE |
|
[in, out] DATE* |
|
[in] DATE |
|
[in, out] DATE* |
|
[in] IFontDisp* |
|
[in, out] IFontDisp** |
|
[in] IPictureDisp* |
|
[in, out] IPictureDisp** |
|
[in] SAFEARRAY(VARIANT) |
|
[in, out] SAFEARRAY(VARIANT)* |
|
QStringList, const QStringList& |
[in] SAFEARRAY(BSTR) |
[in, out] SAFEARRAY(BSTR)* |
|
QByteArray, const QByteArray& |
[in] SAFEARRAY(BYTE) |
[in, out] SAFEARRAY(BYTE)* |
|
[in] IDispatch* |
|
[in, out] struct QRect (user defined) |
|
[in, out] struct QSize (user defined) |
|
[in, out] struct QPoint (user defined) |