src/apps/bootmanager/WizardController.cpp

   1 /*
   2  * Copyright 2008-2010, Haiku, Inc. All rights reserved.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Authors:
   6  *              Michael Pfeiffer <laplace@users.sourceforge.net>
   7  */
   8
   9
  10 #include "WizardController.h"
  11
  12 #include "WizardView.h"
  13 #include "WizardPageView.h"
  14
  15
  16 void
  17 WizardController::StateStack::MakeEmpty()
  18 {
  19         StateStack* stack = this;
  20         StateStack* next;
  21         do {
  22                 next = stack->Next();
  23                 delete stack;
  24                 stack = next;
  25         } while (next != NULL);
  26 }
  27
  28
  29 WizardController::WizardController()
  30         :
  31         fStack(NULL)
  32 {
  33 }
  34
  35
  36 WizardController::~WizardController()
  37 {
  38         if (fStack != NULL) {
  39                 fStack->MakeEmpty();
  40                 fStack = NULL;
  41         }
  42 }
  43
  44
  45 void
  46 WizardController::Initialize(WizardView* view)
  47 {
  48         if (fStack == NULL)
  49                 _PushState(InitialState());
  50         _ShowPage(view);
  51 }
  52
  53
  54 void
  55 WizardController::Next(WizardView* wizard)
  56 {
  57         wizard->PageCompleted();
  58
  59         if (fStack == NULL)
  60                 return;
  61
  62         int state = NextState(fStack->State());
  63         if (state < 0)
  64                 return;
  65
  66         _PushState(state);
  67         _ShowPage(wizard);
  68 }
  69
  70
  71 void
  72 WizardController::Previous(WizardView* wizard)
  73 {
  74         wizard->PageCompleted();
  75
  76         if (fStack != NULL) {
  77                 StateStack* stack = fStack;
  78                 fStack = fStack->Next();
  79                 delete stack;
  80         }
  81         _ShowPage(wizard);
  82 }
  83
  84
  85 int32
  86 WizardController::CurrentState() const
  87 {
  88         if (fStack == NULL)
  89                 return -1;
  90
  91         return fStack->State();
  92 }
  93
  94
  95 void
  96 WizardController::_PushState(int32 state)
  97 {
  98         fStack = new StateStack(state, fStack);
  99 }
 100
 101
 102 void
 103 WizardController::_ShowPage(WizardView* wizard)
 104 {
 105         if (fStack == NULL)
 106                 return;
 107
 108         WizardPageView* page = CreatePage(fStack->State(), wizard);
 109         wizard->SetPage(page);
 110 }