通过单选按钮替换安装类型下拉列表

Question

我最近在我的InnoSetup中添加了不同的安装类型（安装，更新，修复）。这一切都很好。

[Types]
Name: Install; Description: "Install OLP"; 
Name: Update; Description: "Update an existing version of OLP"; 
Name: Repair; Description: "Repair OLP"; 

我唯一不喜欢的是安装运行时出现的下拉列表，以选择其中一种安装类型。

有无法通过广播组替换下拉列表吗？

由于

Answer 1

您可以使用单选按钮（因为Inno Setup中没有可用的无线电组组件）：

[Code]
procedure OnTypeChange(Sender: TObject);
begin
  { set the item index in hidden TypesCombo }
  WizardForm.TypesCombo.ItemIndex := TNewRadioButton(Sender).Tag;
  { notify TypesCombo about the selection change }
  WizardForm.TypesCombo.OnChange(nil);
end;

procedure InitializeWizard;
var
  I: Integer;
  RadioButton: TNewRadioButton;
begin
  for I := 0 to WizardForm.TypesCombo.Items.Count - 1 do
  begin
    { create radio button and set the basic properties }
    RadioButton := TNewRadioButton.Create(WizardForm);
    RadioButton.Parent := WizardForm.SelectComponentsPage;
    RadioButton.Left := WizardForm.TypesCombo.Left;
    RadioButton.Top := WizardForm.TypesCombo.Top + I * RadioButton.Height;
    RadioButton.Width := WizardForm.TypesCombo.Width;
    { check just the first item }
    RadioButton.Checked := I = 0;
    RadioButton.Caption := WizardForm.TypesCombo.Items[I];
    { the Tag property substitutes the index property }
    RadioButton.Tag := I;
    RadioButton.TabOrder := I;     
    RadioButton.OnClick := @OnTypeChange;
  end;
  { hide the TypesCombo combo box }
  WizardForm.TypesCombo.Visible := False;

  { if you're not using the "iscustom" flag in any type entry, you can remove }
  { the following lines, because they resize and reposition the check list box }
  { for component selection, which is hidden, if you don't use "iscustom" flag }
  I := WizardForm.ComponentsList.Top - 
    (RadioButton.Top + RadioButton.Height + 8);
  WizardForm.ComponentsList.Top := RadioButton.Top + RadioButton.Height + 8;
  WizardForm.ComponentsList.Height := WizardForm.ComponentsList.Height + I;
end;

结果（包括iscustom组件列表）：

或者您可以使用例如检查列表框，可以在Inno Setup中包含单选按钮：

[Code]
procedure OnTypeChange(Sender: TObject);
begin
  { set the item index in hidden TypesCombo }
  WizardForm.TypesCombo.ItemIndex := TNewCheckListBox(Sender).ItemIndex;
  { notify TypesCombo about the selection change }
  WizardForm.TypesCombo.OnChange(nil);
end;

procedure InitializeWizard;
var
  I: Integer;
  CheckListBox: TNewCheckListBox;
begin
  { create the TNewCheckListBox object and set the basic properties }
  CheckListBox := TNewCheckListBox.Create(WizardForm);
  CheckListBox.Parent := WizardForm.SelectComponentsPage;
  CheckListBox.Left := WizardForm.TypesCombo.Left;
  CheckListBox.Top := WizardForm.TypesCombo.Top;
  CheckListBox.Width := WizardForm.TypesCombo.Width;
  CheckListBox.Height := CheckListBox.MinItemHeight * 
    WizardForm.TypesCombo.Items.Count + 4;
  CheckListBox.TabOrder := 0;
  { assign the selection change event }
  CheckListBox.OnClickCheck := @OnTypeChange;
  { add radio buttons from all TypesCombo items, select the first item }
  for I := 0 to WizardForm.TypesCombo.Items.Count - 1 do
    CheckListBox.AddRadioButton(WizardForm.TypesCombo.Items[I], 
      '', 0, I = 0, True, nil);
  { hide the TypesCombo combo box }
  WizardForm.TypesCombo.Visible := False;

  { if you're not using the "iscustom" flag in any type entry, you can remove }
  { the following lines, because they resize and reposition the check list box }
  { for component selection, which is hidden, if you don't use "iscustom" flag }
  I := WizardForm.ComponentsList.Top - 
    (CheckListBox.Top + CheckListBox.Height + 8);
  WizardForm.ComponentsList.Top := CheckListBox.Top + 
    CheckListBox.Height + 8;
  WizardForm.ComponentsList.Height := WizardForm.ComponentsList.Height + I;
end;

结果（包括iscustom组件列表）：

Answer 2

一个整洁的解决方案是使用CreateInputOptionPage在组件选择页面之前创建一个带有radiobuttons的单独页面。 （在CodeDlg.iss脚本中有一个例子。）

一个更整洁的选择是根本不问，因为它完全没必要。您可以自动检测已经安装的版本 - 如果它没有安装，它是一个安装，如果安装但更旧，它是一个升级，如果已经安装并且版本相同，那么它是一个修复，最后如果安装了但是更新那么这是一个降级 - 您可能想要禁止（更安全）或允许但显示警告（如果人们可能想要降级则更方便）。