ff65119eb2
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@12897 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
144 lines
3.9 KiB
C++
144 lines
3.9 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: dllwidget.h
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// Purpose: Dynamically loadable C++ widget for wxPython
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// Author: Vaclav Slavik
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// Created: 2001/12/03
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// RCS-ID: $Id$
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// Copyright: (c) 2001 Vaclav Slavik
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifdef __GNUG__
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#pragma interface "dllwidget.h"
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#endif
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#ifndef __DLLWIDGET_H__
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#define __DLLWIDGET_H__
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#include "wx/panel.h"
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/*
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wxDllWidget can be used to embed a wxWindow implemented in C++ in your
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wxPython application without the need to write a SWIG interface. Widget's code
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is stored in shared library or DLL that exports DLL_WidgetFactory symbol
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and loaded at runtime. All you have to do is to pass the name of DLL and the class
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to create to wxDllWidget's ctor.
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Runtime-loadable widget must have HandleCommand method (see the example) that is
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used to communicate with Python app. You call wxDllWidget.SendCommand(cmd,param) from
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Python and it in turn calls HandleCommand of the loaded widget.
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You must use DECLARE_DLL_WIDGET, BEGIN_WIDGET_LIBRARY, END_WIDGET_LIBRARY and
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REGISTER_WIDGET macros in your C++ module in order to provide all the meat
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wxDllWidget needs.
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Example of use:
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#define CMD_MAKEWHITE 1
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class MyWindow : public wxWindow
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{
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public:
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MyWindow(wxWindow *parent, long style)
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: wxWindow(parent, -1) {}
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int HandleCommand(int cmd, const wxString& param)
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{
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if (cmd == CMD_MAKEWHITE)
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SetBackgroundColour(*wxWHITE);
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return 0;
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}
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};
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DECLARE_DLL_WIDGET(MyWindow)
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class MyCanvasWindow : public wxScrolledWindow
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{
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...
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};
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DECLARE_DLL_WIDGET(MyCanvasWindow)
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BEGIN_WIDGET_LIBRARY()
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REGISTER_WIDGET(MyWindow)
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REGISTER_WIDGET(MyCanvasWindow)
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END_WIDGET_LIBRARY()
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*/
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class WXDLLEXPORT wxDynamicLibrary;
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typedef int (*wxSendCommandFunc)(wxWindow *wnd, int cmd, const wxString& param);
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class wxDllWidget : public wxPanel
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{
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public:
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wxDllWidget(wxWindow *parent,
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wxWindowID id = -1,
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const wxString& dllName = wxEmptyString,
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const wxString& className = wxEmptyString,
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const wxPoint& pos = wxDefaultPosition,
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const wxSize& size = wxDefaultSize,
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long style = 0);
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virtual ~wxDllWidget();
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bool Ok() { return m_widget != NULL; }
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virtual int SendCommand(int cmd, const wxString& param = wxEmptyString);
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virtual wxWindow* GetWidgetWindow() { return m_widget; }
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virtual void AddChild(wxWindowBase *child);
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static wxString GetDllExt();
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protected:
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bool LoadWidget(const wxString& dll, const wxString& className, long style);
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void UnloadWidget();
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protected:
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wxWindow* m_widget;
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wxSendCommandFunc m_cmdFunc;
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wxDynamicLibrary* m_lib;
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bool m_controlAdded;
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private:
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DECLARE_ABSTRACT_CLASS(wxDllWidget)
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};
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#define DECLARE_DLL_WIDGET(widget) \
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static int SendCommandTo##widget(wxWindow *wnd, int cmd, const wxString& param) \
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{ \
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return wxStaticCast(wnd, widget)->HandleCommand(cmd, param); \
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}
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#define BEGIN_WIDGET_LIBRARY() \
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extern "C" WXEXPORT bool DLL_WidgetFactory( \
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const wxString& className, \
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wxWindow *parent, \
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long style, \
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wxWindow **classInst, \
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wxSendCommandFunc *cmdFunc) \
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{ \
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wxClassInfo::CleanUpClasses(); \
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wxClassInfo::InitializeClasses();
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#define REGISTER_WIDGET(widget) \
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if ( className == wxT(#widget) ) \
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{ \
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*classInst = new widget(parent, style); \
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*cmdFunc = SendCommandTo##widget; \
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return TRUE; \
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}
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#define END_WIDGET_LIBRARY() \
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return FALSE; \
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}
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#endif // __DLLWIDGET_H__
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