include/vcl/abstdlgimpl.hxx

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   9  * This file incorporates work covered by the following license notice:
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  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
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  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #pragma once
  21
  22 #include <vcl/abstdlg.hxx>
  23 #include <vcl/weld.hxx>
  24
  25 #include <memory>
  26 #include <type_traits>
  27
  28 namespace vcl
  29 {
  30 // Templated base class storing the dialog pointer, and implementing Execute, StartExecuteAsync,
  31 // and the shared constructor used by derived classes
  32 template <class Base, class Dialog, template <class...> class Ptr, bool Async>
  33 requires std::is_base_of_v<VclAbstractDialog, Base>&&
  34     std::is_base_of_v<weld::DialogController, Dialog> class AbstractDialogImpl_BASE : public Base
  35 {
  36 public:
  37     explicit AbstractDialogImpl_BASE(Ptr<Dialog> p)
  38         : m_pDlg(std::move(p))
  39     {
  40     }
  41     template <typename... Arg>
  42     requires std::is_constructible_v<Dialog, Arg...> explicit AbstractDialogImpl_BASE(Arg&&... arg)
  43         : m_pDlg(make_dialog(std::forward<Arg>(arg)...))
  44     {
  45     }
  46
  47     short Execute() override { return m_pDlg->run(); }
  48
  49     bool StartExecuteAsync(VclAbstractDialog::AsyncContext& rCtx) override
  50     {
  51         if constexpr (Async)
  52             return Dialog::runAsync(m_pDlg, rCtx.maEndDialogFn);
  53         else
  54             return Base::StartExecuteAsync(rCtx); // assert / fail
  55     }
  56
  57 protected:
  58     Ptr<Dialog> m_pDlg;
  59
  60 private:
  61     template <typename... Arg> static auto make_dialog(Arg&&... arg)
  62     {
  63         if constexpr (std::is_same_v<Ptr<void>, std::shared_ptr<void>>)
  64             return std::make_shared<Dialog>(std::forward<Arg>(arg)...);
  65         else
  66             return std::make_unique<Dialog>(std::forward<Arg>(arg)...);
  67     }
  68 };
  69
  70 // Base for synchronously called dialogs, using unique_ptr
  71 template <class Base, class Dialog>
  72 using AbstractDialogImpl_Sync = AbstractDialogImpl_BASE<Base, Dialog, std::unique_ptr, false>;
  73
  74 // Base for synchronously called dialogs, using shared_ptr
  75 template <class Base, class Dialog>
  76 using AbstractDialogImpl_Sync_Shared
  77     = AbstractDialogImpl_BASE<Base, Dialog, std::shared_ptr, false>;
  78
  79 // Base for asynchronously called dialogs
  80 template <class Base, class Dialog>
  81 using AbstractDialogImpl_Async = AbstractDialogImpl_BASE<Base, Dialog, std::shared_ptr, true>;
  82 }
  83
  84 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */