From a538aed77be3409f314174df5961e0170ebee0e9 Mon Sep 17 00:00:00 2001
From: Bruce Wernick <info@coolit.co.za>
Date: Sun, 13 Dec 2015 08:27:32 +0200
Subject: [PATCH] Update main.pas

---
 wrappers/Delphi/main.pas | 113 ++++++++++++++++++++++++++-------------
 1 file changed, 75 insertions(+), 38 deletions(-)

diff --git a/wrappers/Delphi/main.pas b/wrappers/Delphi/main.pas
index 07061eb9..e0356165 100644
--- a/wrappers/Delphi/main.pas
+++ b/wrappers/Delphi/main.pas
@@ -1,3 +1,8 @@
+{
+  CoolProp Graphic Demo - Main form
+  Bruce Wernick, 13 December 2015
+}
+
 unit main;
 
 interface
@@ -5,22 +10,25 @@ interface
 uses
   Windows, Messages, SysUtils, Variants, Classes, Graphics,
   Controls, Forms, Dialogs, StdCtrls, ExtCtrls,
-  superobject, uMolChart;
+  uMolChart;
 
 type
   TMainForm = class(TForm)
     ListBox1: TListBox;
     PaintBox1: TPaintBox;
     StaticText1: TStaticText;
+    Button1: TButton;
     procedure FormActivate(Sender: TObject);
     procedure ListBox1Click(Sender: TObject);
     procedure FormCreate(Sender: TObject);
     procedure PaintBox1Paint(Sender: TObject);
-    procedure PaintBox1MouseMove(Sender: TObject; Shift: TShiftState; X,
-      Y: Integer);
+    procedure PaintBox1MouseMove(Sender: TObject; Shift: TShiftState; X, Y: Integer);
+    procedure PaintBox1MouseLeave(Sender: TObject);
+    procedure Button1Click(Sender: TObject);
+    procedure PaintBox1MouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
   private
-    cp: TCanvas;
-    ref: string;
+    fluid: AnsiString;
+    ref: PAnsiChar;
     MolChart: TMolChart;
   public
   end;
@@ -33,63 +41,92 @@ implementation
 {$R *.dfm}
 
 uses
+  clipbrd,
   cpIntf;
 
 procedure TMainForm.FormCreate(Sender: TObject);
+const
+  n = 80;
 var
-  res, rev: CoolVec;
+  res: AnsiString;
 begin
   Caption := 'CoolProp Demo';
-  res := '';
-  rev := '';
-  get_global_param_string('version', res, 1024);
+  SetLength(res, n);
+  get_global_param_string('version', PAnsiChar(res), n);
   Caption := Caption + ' ' + 'Version ' + string(res);
-  get_global_param_string('gitrevision', rev, 1024);
-  Caption := Caption + ' ' + 'Revision ' + string(rev);
-  cp := PaintBox1.Canvas;
-  MolChart := TMolChart.Create(cp);
-  ref := 'R22';
+  get_global_param_string('gitrevision', PAnsiChar(res), n);
+  Caption := Caption + ' ' + 'Revision ' + string(res);
+
+  MolChart := TMolChart.Create(PaintBox1.Canvas);
+  fluid := 'R22'; // initial fluid
+  ref := PAnsiChar(fluid)
 end;
 
 procedure TMainForm.FormActivate(Sender: TObject);
+const
+  n = 2048;
 var
-  dat: CoolVec;
+  res: AnsiString;
 begin
-  get_global_param_string('FluidsList', dat, 1024);
-  ListBox1.Items.CommaText := string(dat);
-  ListBox1.ItemIndex := ListBox1.Items.IndexOf(ref);
+  SetLength(res, n);
+  get_global_param_string('FluidsList', PAnsiChar(res), n);
+  ListBox1.Items.CommaText := string(res);
+  ListBox1.ItemIndex := ListBox1.Items.IndexOf(ref)
 end;
 
 procedure TMainForm.ListBox1Click(Sender: TObject);
 begin
-  ref := ListBox1.Items[ListBox1.ItemIndex];
-  PaintBox1.Refresh;
+  fluid := AnsiString(ListBox1.Items[ListBox1.ItemIndex]);
+  ref := PAnsiChar(fluid);
+  PaintBox1.Refresh
 end;
 
-procedure TMainForm.PaintBox1MouseMove(Sender: TObject; Shift: TShiftState; X,
-  Y: Integer);
+procedure TMainForm.PaintBox1MouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
 var
-  h, p, t: Double;
-  i, j: Integer;
+  h, p: Double;
 begin
-  h := MolChart.P2X(X);
-  p := MolChart.P2Y(Y);
-  try
-    // CoolProp crashes here! (at high pressure liquid)
-    t := PropsSI('T', 'P', 1e6*p, 'H', 1e3*h, CoolStr(ref))-273.15;
-  except
-    t := -99;
-    // paint a yellow blob at the position of the error
-    for j := -1 to 1 do
-      for i := -1 to 1 do
-        PaintBox1.Canvas.Pixels[X+i,Y+j] := clYellow;
-  end;
-  StaticText1.Caption := format('h=%0.3f, p=%0.3f, t=%0.2f', [h,p,t]);
+  h := MolChart.P2X(X); p := MolChart.P2Y(Y);
+  Clipboard.AsText := format('h:%0.3f, p:%0.3f', [h, p]);
+end;
+
+procedure TMainForm.PaintBox1MouseLeave(Sender: TObject);
+begin
+  StaticText1.Caption := fluid
+end;
+
+procedure TMainForm.PaintBox1MouseMove(Sender: TObject; Shift: TShiftState; X, Y: Integer);
+const
+  k0 = 273.15;
+  fmt = '%s: t=%0.2fC, p=%0.3f MPa, h=%0.3f kJ/kg, s=%0.4f kJ/kg-K';
+var
+  h, p, t, s: Double;
+begin
+  h := MolChart.P2X(X); p := MolChart.P2Y(Y);
+  t := PropsSI('T', 'P', 1e6*p, 'H', 1e3*h, ref);
+  s := 1e-3*PropsSI('S', 'P', 1e6*p, 'T', t+k0, ref);
+  StaticText1.Caption := format(fmt, [fluid, t-k0, p, h, s])
 end;
 
 procedure TMainForm.PaintBox1Paint(Sender: TObject);
 begin
-  MolChart.DrawChart(ref, PaintBox1.Width, PaintBox1.Height);
+  StaticText1.Caption := fluid;
+  MolChart.DrawChart(ref, PaintBox1.Width, PaintBox1.Height)
+end;
+
+procedure TMainForm.Button1Click(Sender: TObject);
+var
+  MyFormat: Word;
+  AData: THandle;
+  APalette: HPALETTE;
+  bmp: TBitmap;
+begin
+  bmp := self.GetFormImage;
+  try
+    bmp.SaveToClipBoardFormat(MyFormat, AData, APalette);
+    ClipBoard.SetAsHandle(MyFormat,AData);
+  finally
+    bmp.Free;
+  end;
 end;
 
 end.