ccmake: Display an ASCII progress bar in the status bar

The status bar is now only used to display the progress.
The status log are not shown anymore since for the most cases they went
by too quickly to be read. As for cases when a process is long enough
to display and read a log, it would probably be a previous unrelated
message.

Source/CursesDialog/cmCursesMainForm.cxx

@@ -469,14 +469,18 @@ void cmCursesMainForm::UpdateStatusBar(const char* message)
 
 void cmCursesMainForm::UpdateProgress(const std::string& msg, float prog)
 {
-  char tmp[1024];
-  const char* cmsg = tmp;
   if (prog >= 0) {
-    sprintf(tmp, "%s %i%%", msg.c_str(), static_cast<int>(100 * prog));
-  } else {
-    cmsg = msg.c_str();
+    constexpr int progressBarWidth = 40;
+    int progressBarCompleted = static_cast<int>(progressBarWidth * prog);
+    int percentCompleted = static_cast<int>(100 * prog);
+    std::string status = (percentCompleted < 100 ? " " : "");
+    status += (percentCompleted < 10 ? " " : "");
+    status += std::to_string(percentCompleted) + "% [";
+    status.append(progressBarCompleted, '#');
+    status.append(progressBarWidth - progressBarCompleted, ' ');
+    status += "] " + msg + "...";
+    this->UpdateStatusBar(status.c_str());
   }
-  this->UpdateStatusBar(cmsg);
   this->PrintKeys(1);
   curses_move(1, 1);
   touchwin(stdscr);
@@ -489,11 +493,7 @@ int cmCursesMainForm::Configure(int noconfigure)
   int yi;
   getmaxyx(stdscr, yi, xi);
 
-  curses_move(1, 1);
-  this->UpdateStatusBar("Configuring, please wait...");
-  this->PrintKeys(1);
-  touchwin(stdscr);
-  refresh();
+  this->UpdateProgress("Configuring", 0);
   this->CMakeInstance->SetProgressCallback(
     [this](const std::string& msg, float prog) {
       this->UpdateProgress(msg, prog);
@@ -563,11 +563,7 @@ int cmCursesMainForm::Generate()
   int yi;
   getmaxyx(stdscr, yi, xi);
 
-  curses_move(1, 1);
-  this->UpdateStatusBar("Generating, please wait...");
-  this->PrintKeys(1);
-  touchwin(stdscr);
-  refresh();
+  this->UpdateProgress("Generating", 0);
   this->CMakeInstance->SetProgressCallback(
     [this](const std::string& msg, float prog) {
       this->UpdateProgress(msg, prog);