有两种方法:
A. 使用promotion
最简单的方法。此方法直接获取源代码而无需构建。
这有点繁琐...
CustomWidget
,其中包含 customwidget.cpp
和 customwidget.h
。
CustomWidgetPlugin
,并公开继承 QObject
和 QDesignerCustomWidgetInterface
并重新实现一些虚函数。例如:
customwidget.h
:
#include <QDesignerCustomWidgetInterface>
#include "customwidget.h"
class CustomWidgetPlugin : public QObject, public QDesignerCustomWidgetInterface
{
Q_OBJECT
Q_INTERFACES(QDesignerCustomWidgetInterface) // note this line, it tell moc that the second base class is a plugin interface.
public:
CustomWidget(QObject *parent = 0);
QString name() const;
QString includeFile() const;
QString group() const;
QIcon icon() const;
QString toolTip() const;
QString whatsThis() const;
bool isContainer() const;
QWidget *createWidget(QWidget *parent);
};
customwidget.cpp
:
构造函数:
CustomWidget::CustomWidgetPlugin(QObject *parent)
: QObject(parent)
{
}
名称获取器:
QString CustomWidgetPlugin::name() const
{
return "CustomWidget";
}
QString CustomWidgetPlugin::includeFile() const
{
return "customwidget.h";
}
QString CustomWidgetPlugin::group() const
{
return tr("New Group");
}
图标(用于设计师中显示的图标):
QIcon CustomWidgetPlugin::icon() const
{
return QIcon(":/images/icon.png");
}
QString CustomWidgetPlugin::toolTip() const
{
return tr("This is a widget, got it?");
}
这是什么的信息:
QString CustomWidgetPlugin::whatsThis() const
{
return tr("A widget, already said.");
}
定义是否为“容器”(能否容纳其他小部件):
bool CustomWidgetPlugin::isContainer() const
{
return false;
}
工厂成员函数:
QWidget *CustomWidgetPlugin::createWidget(QWidget *parent)
{
return new CustomWidget(parent);
}
在customwidget.cpp
文件的末尾添加以下宏:
Q_EXPORT_PLUGIN2(customwidgetplugin , CustomWidgetPlugin) // (the widget name, the class name)
TEMPLATE = lib
CONFIG += designer plugin release
HEADERS = ../customwidget.h \
customwidgetplugin.h
SOURCES = ../customwidget.cpp \
customwidgetplugin.cpp
RESOURCES = customwidget.qrc
DESTDIR = $(QTDIR)/plugins/designer #assume QTDIR environment variable is set to the directory where Qt is installed.
$(QTDIR)/plugins/designer
。如果没有,按照以下步骤构建您自己的插件。 - Tay2510