ui_element.cpp

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#include "stdafx.h"


class CMyElemWindow : public ui_element_instance, public CWindowImpl<CMyElemWindow> {
public:
    // ATL window class declaration. Replace class name with your own when reusing code.
    DECLARE_WND_CLASS_EX(TEXT("{DC2917D5-1288-4434-A28C-F16CFCE13C4B}"),CS_VREDRAW | CS_HREDRAW,(-1));

    void initialize_window(HWND parent) {WIN32_OP(Create(parent,0,0,0,WS_EX_STATICEDGE) != NULL);}

    BEGIN_MSG_MAP(ui_element_dummy)
        MESSAGE_HANDLER(WM_LBUTTONDOWN,OnLButtonDown);
        MSG_WM_ERASEBKGND(OnEraseBkgnd)
        MSG_WM_PAINT(OnPaint)
    END_MSG_MAP()

    CMyElemWindow(ui_element_config::ptr,ui_element_instance_callback_ptr p_callback);
    HWND get_wnd() {return *this;}
    void set_configuration(ui_element_config::ptr config) {m_config = config;}
    ui_element_config::ptr get_configuration() {return m_config;}
    static GUID g_get_guid() {
        // This is our GUID. Substitute with your own when reusing code.
        static const GUID guid_myelem = { 0xb46dc166, 0x88f3, 0x4b45, { 0x9f, 0x77, 0xab, 0x33, 0xf4, 0xc3, 0xf2, 0xe4 } };
        return guid_myelem;
    }
    static GUID g_get_subclass() {return ui_element_subclass_utility;}
    static void g_get_name(pfc::string_base & out) {out = "Sample UI Element";}
    static ui_element_config::ptr g_get_default_configuration() {return ui_element_config::g_create_empty(g_get_guid());}
    static const char * g_get_description() {return "This is a sample UI Element.";}
    
    void notify(const GUID & p_what, t_size p_param1, const void * p_param2, t_size p_param2size);
private:
    LRESULT OnLButtonDown(UINT,WPARAM,LPARAM,BOOL&) {m_callback->request_replace(this);return 0;}
    void OnPaint(CDCHandle);
    BOOL OnEraseBkgnd(CDCHandle);
    ui_element_config::ptr m_config;
protected:
    // this must be declared as protected for ui_element_impl_withpopup<> to work.
    const ui_element_instance_callback_ptr m_callback;
};
void CMyElemWindow::notify(const GUID & p_what, t_size p_param1, const void * p_param2, t_size p_param2size) {
    if (p_what == ui_element_notify_colors_changed || p_what == ui_element_notify_font_changed) {
        // we use global colors and fonts - trigger a repaint whenever these change.
        Invalidate();
    }
}
CMyElemWindow::CMyElemWindow(ui_element_config::ptr config,ui_element_instance_callback_ptr p_callback) : m_callback(p_callback), m_config(config) {
}

BOOL CMyElemWindow::OnEraseBkgnd(CDCHandle dc) {
    CRect rc; WIN32_OP_D( GetClientRect(&rc) );
    CBrush brush;
    WIN32_OP_D( brush.CreateSolidBrush( m_callback->query_std_color(ui_color_background) ) != NULL );
    WIN32_OP_D( dc.FillRect(&rc, brush) );
    return TRUE;
}
void CMyElemWindow::OnPaint(CDCHandle) {
    CPaintDC dc(*this);
    dc.SetTextColor( m_callback->query_std_color(ui_color_text) );
    dc.SetBkMode(TRANSPARENT);
    SelectObjectScope fontScope(dc, (HGDIOBJ) m_callback->query_font_ex(ui_font_default) );
    const UINT format = DT_NOPREFIX | DT_CENTER | DT_VCENTER | DT_SINGLELINE;
    CRect rc; 
    WIN32_OP_D( GetClientRect(&rc) );
    WIN32_OP_D( dc.DrawText(_T("This is a sample element."), -1, &rc, format) > 0 );
}

// ui_element_impl_withpopup autogenerates standalone version of our component and proper menu commands. Use ui_element_impl instead if you don't want that.
class ui_element_myimpl : public ui_element_impl_withpopup<CMyElemWindow> {};

static service_factory_single_t<ui_element_myimpl> g_ui_element_myimpl_factory;