latest SDK

foobar2000/foo_sample/ui_element.cpp

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+#include "stdafx.h"
+
+#include <libPPUI/win32_op.h>
+#include <helpers/BumpableElem.h>
+
+
+namespace {
+	// Anonymous namespace : standard practice in fb2k components
+	// Nothing outside should have any reason to see these symbols, and we don't want funny results if another cpp has similarly named classes.
+	// service_factory at the bottom takes care of publishing our class.
+
+	// 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 } };
+
+	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) != NULL);}
+
+		BEGIN_MSG_MAP_EX(CMyElemWindow)
+			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() {
+			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;
+
+} // namespace