GUI: work around Android backspace issue

src/gui/editControls.cpp

@@ -244,6 +244,14 @@ void FurnaceGUI::drawMobileControls() {
             mobileMenuOpen=false;
           }
           ImGui::SameLine();
+          if (ImGui::Button("Log")) {
+            logOpen=!logOpen;
+          }
+          ImGui::SameLine();
+          if (ImGui::Button("Debug")) {
+            debugOpen=!debugOpen;
+          }
+          ImGui::SameLine();
           if (ImGui::Button("About")) {
             mobileMenuOpen=false;
             mobileMenuPos=0.0f;

src/gui/gui.cpp

@@ -2977,6 +2977,10 @@ bool FurnaceGUI::loop() {
     }
     eventTimeBegin=SDL_GetPerformanceCounter();
     bool updateWindow=false;
+    if (injectBackUp) {
+      ImGui::GetIO().AddKeyEvent(ImGuiKey_Backspace,false);
+      injectBackUp=false;
+    }
     while (SDL_PollEvent(&ev)) {
       WAKE_UP;
       ImGui_ImplSDL2_ProcessEvent(&ev);
@@ -3039,6 +3043,9 @@ bool FurnaceGUI::loop() {
           if (!ImGui::GetIO().WantCaptureKeyboard) {
             keyDown(ev);
           }
+#ifdef IS_MOBILE
+          injectBackUp=true;
+#endif
           break;
         case SDL_KEYUP:
           // for now
@@ -3738,6 +3745,10 @@ bool FurnaceGUI::loop() {
           drawPiano();
           break;
       }
+
+      globalWinFlags=0;
+      drawDebug();
+      drawLog();
     } else {
       globalWinFlags=0;
       ImGui::DockSpaceOverViewport(NULL,lockLayout?(ImGuiDockNodeFlags_NoWindowMenuButton|ImGuiDockNodeFlags_NoMove|ImGuiDockNodeFlags_NoResize|ImGuiDockNodeFlags_NoCloseButton|ImGuiDockNodeFlags_NoDocking|ImGuiDockNodeFlags_NoDockingSplitMe|ImGuiDockNodeFlags_NoDockingSplitOther):0);
@@ -5441,6 +5452,7 @@ FurnaceGUI::FurnaceGUI():
   vgmExportPatternHints(false),
   vgmExportDirectStream(false),
   portrait(false),
+  injectBackUp(false),
   mobileMenuOpen(false),
   wantCaptureKeyboard(false),
   oldWantCaptureKeyboard(false),

src/gui/gui.h

@@ -1036,7 +1036,7 @@ class FurnaceGUI {
 
   bool quit, warnQuit, willCommit, edit, modified, displayError, displayExporting, vgmExportLoop, zsmExportLoop, vgmExportPatternHints;
   bool vgmExportDirectStream;
-  bool portrait, mobileMenuOpen;
+  bool portrait, injectBackUp, mobileMenuOpen;
   bool wantCaptureKeyboard, oldWantCaptureKeyboard, displayMacroMenu;
   bool displayNew, fullScreen, preserveChanPos, wantScrollList, noteInputPoly;
   bool displayPendingIns, pendingInsSingle, displayPendingRawSample, snesFilterHex;

src/main.cpp

@@ -317,6 +317,13 @@ void reportError(String what) {
   logE("%s",what);
   MessageBox(NULL,what.c_str(),"Furnace",MB_OK|MB_ICONERROR);
 }
+#elif defined(ANDROID)
+void reportError(String what) {
+  logE("%s",what);
+#ifdef HAVE_SDL2
+  SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR,"Error",what.c_str(),NULL);
+#endif
+}
 #else
 void reportError(String what) {
   logE("%s",what);