120 lines
4.4 KiB
C++
120 lines
4.4 KiB
C++
#include "stdafx.h"
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#include <vector>
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namespace { // anon namespace everything, it's not accessible by means other than the service factory
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// The command ID.
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// Generate a new GUID when reusing code.
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static const GUID guid_menucommand = { 0xab754b0b, 0x204, 0x4471, { 0xb5, 0x29, 0xff, 0x73, 0xae, 0x51, 0x5d, 0xe9 } };
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// Shared with mainmenu.cpp
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static const GUID guid_mainmenu_group_id = { 0x44963e7a, 0x4b2a, 0x4588, { 0xb0, 0x17, 0xa8, 0x69, 0x18, 0xcb, 0x8a, 0xa5 } };
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class sample_command : public mainmenu_node_command {
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public:
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sample_command( size_t index ) : m_index(index) {
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}
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void get_display(pfc::string_base & text, t_uint32 & flags) override {
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flags = 0;
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text = PFC_string_formatter() << "Test dynamic item #" << m_index;
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}
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void execute(service_ptr_t<service_base> callback) override {
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popup_message::g_show(PFC_string_formatter() << "Invoked test menu item #" << m_index, "Information");
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}
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GUID get_guid() override {
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// This method returns our subcommand ID.
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// Dynamic commands are identified by a pair of GUIDs:
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// - command ID ( see: mainmenu_commands interface )
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// - subcommand ID ( identifier of one of the dynamic items )
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// Subcommand identifiers don't have to be actually globally unique,
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// as long as they're unique among the subcommand identifiers for this command ID.
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// In our case, we'll just create a makeshift GUID from a hash of the index.
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// This is perfectly okay for production code - as long as your command ID is a proper GUID!
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// Don't ever hash size_t which varies with CPU architecture
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// Integer endianness intentionally disregarded
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uint32_t hashme = (uint32_t) m_index;
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auto api = hasher_md5::get();
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hasher_md5_state state;
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api->initialize( state );
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api->process( state, &hashme, sizeof(hashme) );
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// fb2k hasher_md5 API even provides a convenient method to return MD5 hashes cast to GUIDs for this.
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return api->get_result_guid( state );
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}
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bool get_description(pfc::string_base & out) {
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out = PFC_string_formatter() << "This is a test menu item #" << m_index << ".";
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return true;
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}
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private:
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const size_t m_index;
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};
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class sample_group : public mainmenu_node_group {
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public:
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sample_group() {
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m_children.resize(11);
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for( size_t walk = 0; walk < m_children.size(); ++ walk ) {
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mainmenu_node::ptr node;
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// Insert separators for odd items, commands for even
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if ( walk % 2 ) {
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node = fb2k::service_new<mainmenu_node_separator>();
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} else {
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auto cmdIndex = walk/2 + 1;
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node = fb2k::service_new<sample_command>( cmdIndex );
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}
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m_children[walk] = std::move(node);
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}
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}
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void get_display(pfc::string_base & text, t_uint32 & flags) override {
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flags = 0;
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text = "Dynamic menu test group";
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}
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t_size get_children_count() override {
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return m_children.size();
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}
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mainmenu_node::ptr get_child(t_size index) override {
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PFC_ASSERT( index < m_children.size() );
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return m_children[index];
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}
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private:
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std::vector<mainmenu_node::ptr> m_children;
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};
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class mainmenu_sample_dynamic : public mainmenu_commands_v2 {
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public:
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// mainmenu_commands_v2 methods
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t_uint32 get_command_count() override { return 1; }
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GUID get_command(t_uint32 p_index) override {return guid_menucommand;}
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void get_name(t_uint32 p_index,pfc::string_base & p_out) override {p_out = "Dynamic menu test";}
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bool get_description(t_uint32 p_index,pfc::string_base & p_out) override {
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// Should not get here much
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p_out = "This is a dynamic menu command test.";
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return true;
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}
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GUID get_parent() override {return guid_mainmenu_group_id; }
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void execute(t_uint32 p_index,service_ptr_t<service_base> p_callback) override {
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// Should not get here, someone not aware of our dynamic status tried to invoke us?
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}
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bool is_command_dynamic(t_uint32 index) override { return true; }
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mainmenu_node::ptr dynamic_instantiate(t_uint32 index) override {
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return fb2k::service_new<sample_group>();
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}
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bool dynamic_execute(t_uint32 index, const GUID & subID, service_ptr_t<service_base> callback) override {
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// If your component provides a more efficient way to execute the command,
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// than doing full dynamic_instantiate() and walking all the dynamic items to find one with the matching identifier,
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// please implement it here.
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// ... or just skip implementing this method entirely.
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return __super::dynamic_execute( index, subID, callback );
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}
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};
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static service_factory_single_t<mainmenu_sample_dynamic> g_mainmenu_sample_dynamic;
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} // namespace
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