如何显示完成百分比，已用时间和预计时间进度？

Question

我想显示完成百分比，已用时间和安装过程的估计时间值。有没有办法添加下面屏幕截图中标记的文本标签？

Answer 1

在Inno Setup 5.5.4中引入CurInstallProgressChanged事件方法之前实现此功能并不容易。但现在，有了这个事件，你可以写一个这样的脚本：

特别感谢user1662035提出的修复在回滚过程中隐藏标签的想法。

[Setup]
AppName=My Program
AppVersion=1.5
DefaultDirName={pf}\My Program

[Files]
Source: "MyProg.exe"; DestDir: "{app}"
Source: "MyProg.chm"; DestDir: "{app}"
Source: "Readme.txt"; DestDir: "{app}"

[Code]
function GetTickCount: DWORD;
  external 'GetTickCount@kernel32.dll stdcall';

var
  StartTick: DWORD;
  PercentLabel: TNewStaticText;
  ElapsedLabel: TNewStaticText;
  RemainingLabel: TNewStaticText;

function TicksToStr(Value: DWORD): string;
var
  I: DWORD;
  Hours, Minutes, Seconds: Integer;
begin
  I := Value div 1000;
  Seconds := I mod 60;
  I := I div 60;
  Minutes := I mod 60;
  I := I div 60;
  Hours := I mod 24;
  Result := Format('%.2d:%.2d:%.2d', [Hours, Minutes, Seconds]);
end;

procedure InitializeWizard;
begin
  PercentLabel := TNewStaticText.Create(WizardForm);
  PercentLabel.Parent := WizardForm.ProgressGauge.Parent;
  PercentLabel.Left := 0;
  PercentLabel.Top := WizardForm.ProgressGauge.Top +
    WizardForm.ProgressGauge.Height + 12;

  ElapsedLabel := TNewStaticText.Create(WizardForm);
  ElapsedLabel.Parent := WizardForm.ProgressGauge.Parent;
  ElapsedLabel.Left := 0;
  ElapsedLabel.Top := PercentLabel.Top + PercentLabel.Height + 4;

  RemainingLabel := TNewStaticText.Create(WizardForm);
  RemainingLabel.Parent := WizardForm.ProgressGauge.Parent;
  RemainingLabel.Left := 0;
  RemainingLabel.Top := ElapsedLabel.Top + ElapsedLabel.Height + 4;
end;

procedure CurPageChanged(CurPageID: Integer);
begin
  if CurPageID = wpInstalling then
    StartTick := GetTickCount;
end;

procedure CancelButtonClick(CurPageID: Integer; var Cancel, Confirm: Boolean);
begin
  if CurPageID = wpInstalling then
  begin
    Cancel := False;
    if ExitSetupMsgBox then
    begin
      Cancel := True;
      Confirm := False;
      PercentLabel.Visible := False;
      ElapsedLabel.Visible := False;
      RemainingLabel.Visible := False;
    end;
  end;
end;

procedure CurInstallProgressChanged(CurProgress, MaxProgress: Integer);
var
  CurTick: DWORD;
begin
  CurTick := GetTickCount;
  PercentLabel.Caption :=
    Format('Done: %.2f %%', [(CurProgress * 100.0) / MaxProgress]);
  ElapsedLabel.Caption := 
    Format('Elapsed: %s', [TicksToStr(CurTick - StartTick)]);
  if CurProgress > 0 then
  begin
    RemainingLabel.Caption :=
      Format('Remaining: %s', [TicksToStr(
        ((CurTick - StartTick) / CurProgress) * (MaxProgress - CurProgress))]);
  end;
end;