examples/CBuilder/ExDQueU.cpp

// ***** BEGIN LICENSE BLOCK *****
// * Version: MPL 1.1
// *
// * The contents of this file are subject to the Mozilla Public License Version
// * 1.1 (the "License"); you may not use this file except in compliance with
// * the License. You may obtain a copy of the License at
// * http://www.mozilla.org/MPL/
// *
// * Software distributed under the License is distributed on an "AS IS" basis,
// * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
// * for the specific language governing rights and limitations under the
// * License.
// *
// * The Original Code is TurboPower SysTools
// *
// * The Initial Developer of the Original Code is
// * TurboPower Software
// *
// * Portions created by the Initial Developer are Copyright (C) 1996-2002
// * the Initial Developer. All Rights Reserved.
// *
// * Contributor(s):
// *
// * ***** END LICENSE BLOCK *****
//---------------------------------------------------------------------------
#include <vcl\vcl.h>
#pragma hdrstop

#include "ExDQueU.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma link "StDQue"

#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall MyDelNodeData(void * Data)
{
  delete (String*)Data;
}
//---------------------------------------------------------------------------
void * __fastcall MyLoadData(Classes::TReader* Reader)
{
  String *S;
  S = new String;
  *S = Reader->ReadString();
  return S;
}
//---------------------------------------------------------------------------
void __fastcall MyStoreData(Classes::TWriter* Writer, void * Data)
{
  Writer->WriteString( (*(String*)Data) );
}
//---------------------------------------------------------------------------
void __fastcall TForm1::FormCreate(TObject *Sender)
{
  RegisterClassAlias(__classid(TStDQue), "TStDQue");
  RegisterClassAlias(__classid(TStListNode), "TStListNode");
  UpdateButtons(false);
}
//---------------------------------------------------------------------------
void __fastcall TForm1::FormClose(TObject *Sender, TCloseAction &Action)
{
  delete MyDQue;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::CreateBtnClick(TObject *Sender)
{
  String *S;

  if (MyDQue)
    delete MyDQue;

  UpdateButtons(false);
  MyDQue = new TStDQue(__classid(TStListNode));

  MyDQue->DisposeData = MyDelNodeData;
  MyDQue->LoadData = MyLoadData;
  MyDQue->StoreData = MyStoreData;

  for (int I = 1; I <= 100; I++) {
    S = new String;
    *S = "Item" + IntToStr(I);
    MyDQue->Append(S);
  }
  FillListBox();
  UpdateButtons(true);
}
//---------------------------------------------------------------------------
void __fastcall TForm1::ClearBtnClick(TObject *Sender)
{
  MyDQue->Clear();
  Edit1->Text = "";
  FillListBox();
  UpdateButtons(false);
}
//---------------------------------------------------------------------------
void __fastcall TForm1::PushHeadBtnClick(TObject *Sender)
{
  String *NewString;

  if (Edit1->Text == "") {
    ShowMessage("No value entered");
    return;
  }

  NewString = new String;
  *NewString = Edit1->Text;
  MyDQue->PushHead(NewString);
  FillListBox();
}
//---------------------------------------------------------------------------
void __fastcall TForm1::PopHeadBtnClick(TObject *Sender)
{
  MyDQue->PopHead();
  FillListBox();
}
//---------------------------------------------------------------------------
void __fastcall TForm1::PushTailBtnClick(TObject *Sender)
{
  String *NewString;

  if (Edit1->Text == "") {
    ShowMessage("No value entered");
    return;
  }

  NewString = new String;
  *NewString = Edit1->Text;
  MyDQue->PushTail(NewString);
  FillListBox();
}
//---------------------------------------------------------------------------
void __fastcall TForm1::PopTailBtnClick(TObject *Sender)
{
  MyDQue->PopTail();
  FillListBox();
}
//---------------------------------------------------------------------------
void __fastcall TForm1::HeadBtnClick(TObject *Sender)
{
  void *Data;

  MyDQue->PeekHead(Data);
  Edit1->Text = *((String*)Data);
}
//---------------------------------------------------------------------------
void __fastcall TForm1::TailBtnClick(TObject *Sender)
{
  void *Data;

  MyDQue->PeekTail(Data);
  Edit1->Text = *((String*)Data);
}
//---------------------------------------------------------------------------
void __fastcall TForm1::LoadBtnClick(TObject *Sender)
{
  if (OD1->Execute()) {
    if (!MyDQue) {
      UpdateButtons(false);
      MyDQue = new TStDQue(__classid(TStListNode));
      MyDQue->DisposeData = MyDelNodeData;
      MyDQue->LoadData = MyLoadData;
      MyDQue->StoreData = MyStoreData;
    }
    MyDQue->LoadFromFile(OD1->FileName);
    FillListBox();
    UpdateButtons(true);
  }
}
//---------------------------------------------------------------------------
void __fastcall TForm1::SaveBtnClick(TObject *Sender)
{
  if (SD1->Execute())
    MyDQue->StoreToFile(SD1->FileName);
}
//---------------------------------------------------------------------------
void TForm1::FillListBox(void)
{
  TStListNode *PN;

  LB1->Clear();
  LB1->Perform(WM_SETREDRAW, 0, 0);
  PN = MyDQue->Head;
  while (PN) {
    LB1->Items->Add(*((String*)(PN->Data)));
    PN = MyDQue->Next(PN);
  }
  LB1->Perform(WM_SETREDRAW, 1, 0);
  LB1->Update();
}
//---------------------------------------------------------------------------
void TForm1::UpdateButtons(bool QueOK)
{
  ClearBtn->Enabled = QueOK;
  PushHeadBtn->Enabled  = QueOK;
  PopHeadBtn->Enabled  = QueOK;
  PushTailBtn->Enabled  = QueOK;
  PopTailBtn->Enabled  = QueOK;
  HeadBtn->Enabled  = QueOK;
  TailBtn->Enabled  = QueOK;
  SaveBtn->Enabled  = QueOK;
}
//---------------------------------------------------------------------------
1	// *** BEGIN LICENSE BLOCK ***
2	// * Version: MPL 1.1
3	// *
4	// * The contents of this file are subject to the Mozilla Public License Version
5	// * 1.1 (the "License"); you may not use this file except in compliance with
6	// * the License. You may obtain a copy of the License at
7	// * http://www.mozilla.org/MPL/
8	// *
9	// * Software distributed under the License is distributed on an "AS IS" basis,
10	// * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
11	// * for the specific language governing rights and limitations under the
12	// * License.
13	// *
14	// * The Original Code is TurboPower SysTools
15	// *
16	// * The Initial Developer of the Original Code is
17	// * TurboPower Software
18	// *
19	// * Portions created by the Initial Developer are Copyright (C) 1996-2002
20	// * the Initial Developer. All Rights Reserved.
21	// *
22	// * Contributor(s):
23	// *
24	// * *** END LICENSE BLOCK ***
25	//---------------------------------------------------------------------------
26	#include <vcl\vcl.h>
27	#pragma hdrstop
28
29	#include "ExDQueU.h"
30	//---------------------------------------------------------------------------
31	#pragma package(smart_init)
32	#pragma link "StDQue"
33
34	#pragma resource "*.dfm"
35	TForm1 *Form1;
36	//---------------------------------------------------------------------------
37	__fastcall TForm1::TForm1(TComponent* Owner)
38	: TForm(Owner)
39	{
40	}
41	//---------------------------------------------------------------------------
42	void __fastcall MyDelNodeData(void * Data)
43	{
44	delete (String*)Data;
45	}
46	//---------------------------------------------------------------------------
47	void * __fastcall MyLoadData(Classes::TReader* Reader)
48	{
49	String *S;
50	S = new String;
51	*S = Reader->ReadString();
52	return S;
53	}
54	//---------------------------------------------------------------------------
55	void __fastcall MyStoreData(Classes::TWriter* Writer, void * Data)
56	{
57	Writer->WriteString( ((String)Data) );
58	}
59	//---------------------------------------------------------------------------
60	void __fastcall TForm1::FormCreate(TObject *Sender)
61	{
62	RegisterClassAlias(__classid(TStDQue), "TStDQue");
63	RegisterClassAlias(__classid(TStListNode), "TStListNode");
64	UpdateButtons(false);
65	}
66	//---------------------------------------------------------------------------
67	void __fastcall TForm1::FormClose(TObject *Sender, TCloseAction &Action)
68	{
69	delete MyDQue;
70	}
71	//---------------------------------------------------------------------------
72	void __fastcall TForm1::CreateBtnClick(TObject *Sender)
73	{
74	String *S;
75
76	if (MyDQue)
77	delete MyDQue;
78
79	UpdateButtons(false);
80	MyDQue = new TStDQue(__classid(TStListNode));
81
82	MyDQue->DisposeData = MyDelNodeData;
83	MyDQue->LoadData = MyLoadData;
84	MyDQue->StoreData = MyStoreData;
85
86	for (int I = 1; I <= 100; I++) {
87	S = new String;
88	*S = "Item" + IntToStr(I);
89	MyDQue->Append(S);
90	}
91	FillListBox();
92	UpdateButtons(true);
93	}
94	//---------------------------------------------------------------------------
95	void __fastcall TForm1::ClearBtnClick(TObject *Sender)
96	{
97	MyDQue->Clear();
98	Edit1->Text = "";
99	FillListBox();
100	UpdateButtons(false);
101	}
102	//---------------------------------------------------------------------------
103	void __fastcall TForm1::PushHeadBtnClick(TObject *Sender)
104	{
105	String *NewString;
106
107	if (Edit1->Text == "") {
108	ShowMessage("No value entered");
109	return;
110	}
111
112	NewString = new String;
113	*NewString = Edit1->Text;
114	MyDQue->PushHead(NewString);
115	FillListBox();
116	}
117	//---------------------------------------------------------------------------
118	void __fastcall TForm1::PopHeadBtnClick(TObject *Sender)
119	{
120	MyDQue->PopHead();
121	FillListBox();
122	}
123	//---------------------------------------------------------------------------
124	void __fastcall TForm1::PushTailBtnClick(TObject *Sender)
125	{
126	String *NewString;
127
128	if (Edit1->Text == "") {
129	ShowMessage("No value entered");
130	return;
131	}
132
133	NewString = new String;
134	*NewString = Edit1->Text;
135	MyDQue->PushTail(NewString);
136	FillListBox();
137	}
138	//---------------------------------------------------------------------------
139	void __fastcall TForm1::PopTailBtnClick(TObject *Sender)
140	{
141	MyDQue->PopTail();
142	FillListBox();
143	}
144	//---------------------------------------------------------------------------
145	void __fastcall TForm1::HeadBtnClick(TObject *Sender)
146	{
147	void *Data;
148
149	MyDQue->PeekHead(Data);
150	Edit1->Text = ((String)Data);
151	}
152	//---------------------------------------------------------------------------
153	void __fastcall TForm1::TailBtnClick(TObject *Sender)
154	{
155	void *Data;
156
157	MyDQue->PeekTail(Data);
158	Edit1->Text = ((String)Data);
159	}
160	//---------------------------------------------------------------------------
161	void __fastcall TForm1::LoadBtnClick(TObject *Sender)
162	{
163	if (OD1->Execute()) {
164	if (!MyDQue) {
165	UpdateButtons(false);
166	MyDQue = new TStDQue(__classid(TStListNode));
167	MyDQue->DisposeData = MyDelNodeData;
168	MyDQue->LoadData = MyLoadData;
169	MyDQue->StoreData = MyStoreData;
170	}
171	MyDQue->LoadFromFile(OD1->FileName);
172	FillListBox();
173	UpdateButtons(true);
174	}
175	}
176	//---------------------------------------------------------------------------
177	void __fastcall TForm1::SaveBtnClick(TObject *Sender)
178	{
179	if (SD1->Execute())
180	MyDQue->StoreToFile(SD1->FileName);
181	}
182	//---------------------------------------------------------------------------
183	void TForm1::FillListBox(void)
184	{
185	TStListNode *PN;
186
187	LB1->Clear();
188	LB1->Perform(WM_SETREDRAW, 0, 0);
189	PN = MyDQue->Head;
190	while (PN) {
191	LB1->Items->Add(((String)(PN->Data)));
192	PN = MyDQue->Next(PN);
193	}
194	LB1->Perform(WM_SETREDRAW, 1, 0);
195	LB1->Update();
196	}
197	//---------------------------------------------------------------------------
198	void TForm1::UpdateButtons(bool QueOK)
199	{
200	ClearBtn->Enabled = QueOK;
201	PushHeadBtn->Enabled = QueOK;
202	PopHeadBtn->Enabled = QueOK;
203	PushTailBtn->Enabled = QueOK;
204	PopTailBtn->Enabled = QueOK;
205	HeadBtn->Enabled = QueOK;
206	TailBtn->Enabled = QueOK;
207	SaveBtn->Enabled = QueOK;
208	}
209	//---------------------------------------------------------------------------