1
我試圖在將PrepareToInstall頁面上的進度條和標籤複製（遷移）到以前的安裝到新位置時顯示。我正在使用Martin Prikryl的DirectoryCopy程序的稍微修改版本，並按預期工作;將文件和目錄複製到新位置，並將操作記錄到文件中。Inno Setup在PrepareToInstall頁面上顯示目錄複製進度條和標籤
但是，在複製文件時，如果有很多文件（我測試了2,500個文件，總共大約1.2GB，這可能是一個相當長的運行操作），GUI不更新並顯示凍結，而不顯示任何我的自定義控件（即沒有進度條和沒有進度標籤）。我設法通過調用Refresh或Update來強制顯示這些顯示，但進度條沒有動畫效果，並且在複製操作完成時，整個GUI顯示無響應。我認爲Inno Setup僅支持single-threaded operations is maybe what is causing the GUI to freeze and not update這一事實。有沒有辦法複製文件並同時更新GUI？
[Code]
var
PrepareToInstallLabel: TNewStaticText;
PrepareToInstallProgressBar: TNewProgressBar;
//Slightly modified Public Domain code to copy a directory recursively and update PrepareToInstall label progress
//Contributed by Martin Prikryl on Stack Overflow
procedure DirCopy(strSourcePath, strDestPath: String);
var
FindRec: TFindRec;
strSourceFilePath, strDestFilePath: String;
begin
if FindFirst(strSourcePath + '\*', FindRec) then
begin
try
repeat
if (FindRec.Name <> '.') and (FindRec.Name <> '..') then
begin
strSourceFilePath := strSourcePath + '\' + FindRec.Name;
strDestFilePath := strDestPath + '\' + FindRec.Name;
if FindRec.Attributes and FILE_ATTRIBUTE_DIRECTORY = 0 then
begin
PrepareToInstallLabel.Caption := 'Copying ' + strSourceFilePath + '...';
if FileCopy(strSourceFilePath, strDestFilePath, False) then
begin
Log(Format('Copied %s to %s', [strSourceFilePath, strDestFilePath]));
end
else
begin
SuppressibleMsgBox(Format('Failed to copy %s to %s', [strSourceFilePath, strDestFilePath]),
mbError, MB_OK, IDOK);
end;
end
else
begin
if CreateDir(strDestFilePath) then
begin
Log(Format('Created %s', [strDestFilePath]));
DirCopy(strSourceFilePath, strDestFilePath);
end
else
begin
SuppressibleMsgBox(Format('Failed to create %s', [strDestFilePath]),
mbError, MB_OK, IDOK);
end;
end;
end;
until
not FindNext(FindRec);
finally
FindClose(FindRec);
end;
end
else
begin
SuppressibleMsgBox(Format('Failed to list %s', [strSourcePath]),
mbError, MB_OK, IDOK);
end;
end;
//Show PrepareToInstall page GUI controls
procedure ShowPrepareToInstallGuiControls();
begin
PrepareToInstallProgressBar.Visible := True;
PrepareToInstallLabel.Visible := True;
end;
//Update PrepareToInstall page GUI controls; note this procedure should not be needed
procedure UpdatePrepareToInstallGuiControls();
begin
//Both lines below seem to be needed to force the Cancel button to disable,
//despite already disabling the button at the beginning of the PrepareToInstall event
WizardForm.CancelButton.Enabled := False;
WizardForm.CancelButton.Refresh;
//Both lines below seem to be needed to force display of the progress bar and label,
//despite already showing them in the PrepareToInstall event; without them no controls are shown on the page.
PrepareToInstallLabel.Update;
PrepareToInstallProgressBar.Update;
end;
//Hide PrepareToInstall page GUI controls
procedure HidePrepareToInstallGuiControls();
begin
PrepareToInstallProgressBar.Visible := False;
PrepareToInstallLabel.Visible := False;
end;
function PrepareToInstall(var NeedsRestart: Boolean): String;
begin
WizardForm.CancelButton.Enabled := False;
//Migrate installation
if IsMigration then
begin
ShowPrepareToInstallGuiControls;
PrepareToInstallLabel.Caption := 'Migrating installation...';
UpdatePrepareToInstallGuiControls;
Log('Installation migration started.');
ForceDirectories(ExpandConstant('{app}\FolderToMigrate'));
DirCopy(strExistingInstallPath + '\Database', ExpandConstant('{app}\FolderToMigrate'));
Log('Installation migration finished.');
end;
HidePrepareToInstallGuiControls;
end;
procedure InitializeWizard();
//Define the label for the Preparing to Install page
PrepareToInstallLabel := TNewStaticText.Create(WizardForm);
with PrepareToInstallLabel do
begin
Visible := False;
Parent := WizardForm.PreparingPage;
Left := WizardForm.StatusLabel.Left;
Top := WizardForm.StatusLabel.Top;
end;
//Define Progress Bar for the Preparing to Install Page
PrepareToInstallProgressBar := TNewProgressBar.Create(WizardForm);
with PrepareToInstallProgressBar do
begin
Visible := False;
Parent := WizardForm.PreparingPage;
Left := WizardForm.ProgressGauge.Left;
Top := WizardForm.ProgressGauge.Top;
Width := WizardForm.ProgressGauge.Width;
Height := WizardForm.ProgressGauge.Height;
Min := 0;
Max := 100;
Style := npbstMarquee;
end;
end;
更新：我添加WizardForm.Refresh;PrepareToInstallLabel.Caption := 'Copying ' + strSourceFilePath + '...';下，這似乎強制標籤以更新，但仍然沒有進度條動畫。此外，在複製每個文件後，調用WizardForm.Refresh幾千次似乎並不是特別有效。