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117 lines
4.0 KiB
C++
117 lines
4.0 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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// $NoKeywords: $
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//=============================================================================//
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#include "MenuDemo.h"
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//-----------------------------------------------------------------------------
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// Purpose: Constructor
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//-----------------------------------------------------------------------------
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MenuDemo::MenuDemo(Panel *parent, const char *name) : DemoPage(parent, name)
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{
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// It takes 3 parts to make a simple menu.
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// 1. A MenuButton that triggers the menu to open.
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// 2. A Menu that opens when the button is pressed.
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// 3. MenuItems that are listed in the menu and execute commands when selected.
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// First create a menu button.
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m_pMenuButton = new MenuButton(this, "AMenuButton", "Press Me To Open Menu!");
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// Size the Button to its label.
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int wide, tall;
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m_pMenuButton->GetContentSize(wide, tall);
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m_pMenuButton->SetSize(wide + Label::Content, tall + Label::Content);
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// Next create a menu, and link it to the menu button
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m_pMenu = new Menu(m_pMenuButton, "AMenu");
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// Now add menu items to the menu. These are the choices that will be seen.
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// In adding an item the first arg is the name of the item as it will
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// appear in the list, '&' chars are used to flag windows hotkeys that
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// will also work to select the item. They will have a little underline
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// underneath them.
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// The second arg is a KeyValues structure, that in this case holds a string name
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// of the command to be sent when the item is selected.
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// The third arg is the target of the command, we are sending all commands
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// back to this class.
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m_pMenu->AddMenuItem("&Homer", new KeyValues ("Homer"), this);
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m_pMenu->AddMenuItem("&Apu", new KeyValues ("Apu"), this);
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m_pMenu->AddMenuItem("&Bart", new KeyValues ("Bart"), this);
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// A Menu Item with no hotkey
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m_pMenu->AddMenuItem("Lisa", new KeyValues ("Lisa"), this);
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m_pMenu->AddMenuItem("&George", new KeyValues ("George"), this);
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m_pMenu->AddMenuItem("&Marge", new KeyValues ("Marge"), this);
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// The 'M' hotkey was already used in Marge, 'a' and 'g' are also taken.
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// Use another letter not taken for the hotkey.
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m_pMenu->AddMenuItem("Maggi&e", new KeyValues ("Maggie"), this);
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// Hide the menu to start. The button will make it visible.
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m_pMenu->SetVisible(false);
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// Tell the menu button which menu it should open.
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m_pMenuButton->SetMenu(m_pMenu);
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// Position the menu button in the window.
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int x, y, dwide, dtall;
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GetBounds (x, y, dwide, dtall);
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m_pMenuButton->SetPos(10, dtall/2);
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// By default the menu's width will be that of the largest item it contains.
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// You can also set a fixed width, which we will do so our menu doesn't look so
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// scrawny.
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// Get the size of the menu button
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m_pMenuButton->GetSize(wide, tall);
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// Set the width of the menu to be the same as the menu button.
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// Comment this line out if you want to see the menu in its original scrawny size
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m_pMenu->SetFixedWidth(wide);
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}
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//-----------------------------------------------------------------------------
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// Purpose: Destructor
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//-----------------------------------------------------------------------------
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MenuDemo::~MenuDemo()
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{
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}
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//-----------------------------------------------------------------------------
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// Purpose: This is the function that will be executed when the "Maggie"
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// messsage is recieved. Selecting the "Maggie" menu item will trigger
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// this message to be sent. This class has been selected as the target of the
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// button, and our Message Map translates this string message to a function
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// command.
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//-----------------------------------------------------------------------------
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void MenuDemo::OnMaggie()
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{
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// Put a breakpoint here and watch the code break
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// when you select "Maggie"
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ivgui()->DPrintf("Maggie selected.\n");
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}
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// explain message passing
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MessageMapItem_t MenuDemo::m_MessageMap[] =
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{
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MAP_MESSAGE( MenuDemo, "Maggie", OnMaggie ), // from outermenu
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};
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IMPLEMENT_PANELMAP(MenuDemo, DemoPage);
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Panel* MenuDemo_Create(Panel *parent)
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{
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return new MenuDemo(parent, "MenuDemo");
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}
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