New song dialog: auto focus on pop up + reset search box

src/gui/gui.cpp

@@ -4840,6 +4840,7 @@ bool FurnaceGUI::loop() {
     }
 
     if (displayNew) {
+      newSongQuery = "";
       displayNew=false;
       ImGui::OpenPopup("New Song");
     }

src/gui/newSong.cpp

@@ -23,6 +23,9 @@
 #include <algorithm>
 
 void FurnaceGUI::drawNewSong() {
+  // Be sure to reset this to true when the popup is closed
+  static bool firstFrame = true;
+
   bool accepted=false;
 
   ImGui::PushFont(bigFont);
@@ -34,6 +37,10 @@ void FurnaceGUI::drawNewSong() {
   avail.y-=ImGui::GetFrameHeightWithSpacing();
 
   if (ImGui::BeginChild("sysPickerC",avail,false,ImGuiWindowFlags_NoScrollWithMouse|ImGuiWindowFlags_NoScrollbar)) {
+    if (firstFrame) {
+      ImGui::SetKeyboardFocusHere();
+      firstFrame = false;
+    }
     ImGui::SetNextItemWidth(ImGui::GetContentRegionAvail().x);
     if (ImGui::InputTextWithHint("##SysSearch","Search...",&newSongQuery)) {
       String lowerCase=newSongQuery;
@@ -122,10 +129,12 @@ void FurnaceGUI::drawNewSong() {
 
   if (ImGui::Button("I'm feeling lucky")) {
     if (sysCategories.size()==0) {
+      firstFrame = true;
       ImGui::CloseCurrentPopup();
     } else {
       FurnaceGUISysCategory* newSystemCat=&sysCategories[rand()%sysCategories.size()];
       if (newSystemCat->systems.size()==0) {
+        firstFrame = true;
         ImGui::CloseCurrentPopup();
       } else {
         unsigned int selection=rand()%newSystemCat->systems.size();
@@ -139,6 +148,7 @@ void FurnaceGUI::drawNewSong() {
   ImGui::SameLine();
 
   if (ImGui::Button("Cancel")) {
+    firstFrame = true;
     ImGui::CloseCurrentPopup();
   }
 
@@ -157,6 +167,7 @@ void FurnaceGUI::drawNewSong() {
     selEnd=SelectionPoint();
     cursor=SelectionPoint();
     updateWindowTitle();
+    firstFrame = true;
     ImGui::CloseCurrentPopup();
   }
 }