SPE-2575:: Do not allow busy cursor logic in webview on linux

Allow changes of cursor only when panel is shown.

src/slic3r/GUI/ConfigWizardWebViewPage.cpp

@@ -106,13 +106,24 @@ void ConfigWizardWebViewPage::load_error_page() {
     m_load_error_page = true;
 }
 
+constexpr bool is_linux =
+#if defined(__linux__)
+true;
+#else
+false;
+#endif
+
 void ConfigWizardWebViewPage::on_idle(wxIdleEvent &WXUNUSED(evt)) {
     if (!m_browser)
         return;
     if (m_browser->IsBusy()) {
+        if constexpr (!is_linux) { 
             wxSetCursor(wxCURSOR_ARROWWAIT);
+        }
     } else {
+        if constexpr (!is_linux) { 
             wxSetCursor(wxNullCursor);
+        }
 
         if (!m_vetoed && m_load_error_page) {
             m_load_error_page = false;

src/slic3r/GUI/WebViewDialog.cpp

@@ -148,14 +148,25 @@ WebViewDialog::~WebViewDialog()
 {
 }
 
+constexpr bool is_linux =
+#if defined(__linux__)
+true;
+#else
+false;
+#endif
+
 void WebViewDialog::on_idle(wxIdleEvent& WXUNUSED(evt))
 {
     if (!m_browser)
         return;
     if (m_browser->IsBusy()) {
+       if constexpr (!is_linux) { 
             wxSetCursor(wxCURSOR_ARROWWAIT);
+        }
     } else {
+        if constexpr (!is_linux) { 
             wxSetCursor(wxNullCursor);
+        }
         if (m_load_error_page) {
             m_load_error_page = false;
             m_browser->LoadURL(GUI::format_wxstr("file://%1%/web/error_no_reload.html", boost::filesystem::path(resources_dir()).generic_string()));

src/slic3r/GUI/WebViewPanel.cpp

@@ -218,6 +218,7 @@ void WebViewPanel::on_show(wxShowEvent& evt)
 {
     m_shown = evt.IsShown();
     if (!m_shown) {
+        wxSetCursor(wxNullCursor);
         return;
     }
     if (m_do_late_webview_create) {
@@ -238,12 +239,20 @@ void WebViewPanel::on_idle(wxIdleEvent& WXUNUSED(evt))
 {
     if (!m_browser || m_do_late_webview_create)
         return;
+
+    // The busy cursor on webview is switched off on Linux.
+    // Because m_browser->IsBusy() is almost always true on Printables / Connect.
+#ifndef __linux__
+    if (m_shown) {
         if (m_browser->IsBusy()) {
             wxSetCursor(wxCURSOR_ARROWWAIT);
         } else {
             wxSetCursor(wxNullCursor);
+        }
+    }
+#endif // !__linux__
 
-        if (m_shown && m_load_error_page) {
+    if (m_shown && m_load_error_page && !m_browser->IsBusy()) {
         m_load_error_page = false;
         if (m_load_default_url_on_next_error) {
             m_load_default_url_on_next_error = false;
@@ -257,10 +266,9 @@ void WebViewPanel::on_idle(wxIdleEvent& WXUNUSED(evt))
                 m_browser->RemoveScriptMessageHandler(Slic3r::GUI::from_u8(m_script_message_hadler_names.front()));
                 m_browser->AddScriptMessageHandler(Slic3r::GUI::from_u8(m_script_message_hadler_names.front()));
             } 
+        }
+    }
     
-            }
-        }
-    }
 #ifdef DEBUG_URL_PANEL
     m_button_stop->Enable(m_browser->IsBusy());
 #endif