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	torben	2671	// *** 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			//---------------------------------------------------------------------------