add get_widget_for_response support

Change-Id: I49abb5e6621dbfe2fc92ef9c2a47568c62c372c2
Reviewed-on: https://gerrit.libreoffice.org/51709Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

include/vcl/dialog.hxx

@@ -178,6 +178,7 @@ public:
 
     void            add_button(PushButton* pButton, int nResponse, bool bTransferOwnership);
     void            set_default_response(int nResponse);
+    vcl::Window*    get_widget_for_response(int nResponse);
 };
 
 class VCL_DLLPUBLIC ModelessDialog : public Dialog

include/vcl/weld.hxx

@@ -124,6 +124,8 @@ public:
     ~WaitObject() { m_pWindow->set_busy_cursor(false); }
 };
 
+class Button;
+
 class VCL_DLLPUBLIC Dialog : virtual public Window
 {
 private:
@@ -138,6 +140,7 @@ public:
     virtual void add_button(const OUString& rText, int response, const OString& rHelpId = OString())
         = 0;
     virtual void set_default_response(int response) = 0;
+    virtual Button* get_widget_for_response(int response) = 0;
 };
 
 class VCL_DLLPUBLIC MessageDialog : virtual public Dialog

vcl/source/app/salvtables.cxx

@@ -478,6 +478,8 @@ public:
         m_xDialog->add_button(xButton, nResponse, true);
     }
 
+    virtual weld::Button* get_widget_for_response(int nResponse) override;
+
     virtual void set_default_response(int nResponse) override
     {
         m_xDialog->set_default_response(nResponse);
@@ -665,6 +667,12 @@ IMPL_LINK(SalInstanceButton, ClickHdl, ::Button*, pButton, void)
     signal_clicked();
 }
 
+weld::Button* SalInstanceDialog::get_widget_for_response(int nResponse)
+{
+    PushButton* pButton = dynamic_cast<PushButton*>(m_xDialog->get_widget_for_response(nResponse));
+    return pButton ? new SalInstanceButton(pButton, false) : nullptr;
+}
+
 class SalInstanceRadioButton : public SalInstanceButton, public virtual weld::RadioButton
 {
 private:

vcl/source/window/dialog.cxx

@@ -1355,6 +1355,42 @@ void Dialog::add_button(PushButton* pButton, int response, bool bTransferOwnersh
     }
 }
 
+vcl::Window* Dialog::get_widget_for_response(int response)
+{
+    //copy explicit responses
+    std::map<VclPtr<vcl::Window>, short> aResponses(mpDialogImpl->maResponses);
+
+    //add implicit responses
+    for (vcl::Window* pChild = mpActionArea->GetWindow(GetWindowType::FirstChild); pChild;
+         pChild = pChild->GetWindow(GetWindowType::Next))
+    {
+        if (aResponses.find(pChild) != aResponses.end())
+            continue;
+        switch (pChild->GetType())
+        {
+            case WindowType::OKBUTTON:
+                aResponses[pChild] = RET_OK;
+                break;
+            case WindowType::CANCELBUTTON:
+                aResponses[pChild] = RET_CANCEL;
+                break;
+            case WindowType::HELPBUTTON:
+                aResponses[pChild] = RET_HELP;
+                break;
+            default:
+                break;
+        }
+    }
+
+    for (auto& a : aResponses)
+    {
+        if (a.second == response)
+           return a.first;
+    }
+
+    return nullptr;
+}
+
 void Dialog::set_default_response(int response)
 {
     //copy explicit responses

vcl/unx/gtk3/gtk3gtkinst.cxx

@@ -1647,6 +1647,8 @@ public:
         gtk_dialog_set_default_response(m_pDialog, VclToGtk(nResponse));
     }
 
+    virtual weld::Button* get_widget_for_response(int nResponse) override;
+
     virtual ~GtkInstanceDialog() override
     {
         g_signal_handler_disconnect(m_pDialog, m_nCloseSignalId);
@@ -1857,6 +1859,14 @@ public:
     }
 };
 
+weld::Button* GtkInstanceDialog::get_widget_for_response(int nResponse)
+{
+    GtkButton* pButton = GTK_BUTTON(gtk_dialog_get_widget_for_response(m_pDialog, nResponse));
+    if (!pButton)
+        return nullptr;
+    return new GtkInstanceButton(pButton, false);
+}
+
 class GtkInstanceToggleButton : public GtkInstanceButton, public virtual weld::ToggleButton
 {
 private: