implement manual update

README.md

@@ -20,27 +20,33 @@ For local installation, please download the above file to your project folder an
 You can use this tqdm library with range-based for sytax.
 
 ```cpp
-// wrap std::vector
+std::cout << "wrap std::vector" << std::endl;
 for (const auto& elem : tqdm::Tqdm<int>({0, 1, 2, 3, 4})) {
-  std::cout << elem << std::endl;
   sleep(1);
 }
 
-// add description
+std::cout << "add description" << std::endl;
 for (const auto& elem : tqdm::Tqdm<int>({0, 1, 2, 3, 4}, "test")) {
-  std::cout << elem << std::endl;
   sleep(1);
 }
 
-// trange syntax
+std::cout << "trange syntax" << std::endl;
 for (const auto& elem : tqdm::trange(5)) {
-  std::cout << elem << std::endl;
   sleep(1);
 }
+
+std::cout << "manual update" << std::endl;
+{
+  auto tqdm = tqdm::Tqdm<int>(100);
+  auto pbar = tqdm.begin();
+  for (int i = 0; i < 10; i++) {
+    sleep(1);
+    pbar.update(10);
+  }
+}
 ```
 
 ## ToDo
 
 - [ ] Nested loops
-- [ ] Manual control
 - [ ] Loop and printing compatibility

sample.cpp

@@ -6,20 +6,30 @@
 #include "tqdm-cpp.hpp"
 
 int main() {
+  std::cout << "wrap std::vector" << std::endl;
   for (const auto& elem : tqdm::Tqdm<int>({0, 1, 2, 3, 4})) {
-    std::cout << elem << std::endl;
     sleep(1);
   }
 
+  std::cout << "add description" << std::endl;
   for (const auto& elem : tqdm::Tqdm<int>({0, 1, 2, 3, 4}, "test")) {
-    std::cout << elem << std::endl;
     sleep(1);
   }
 
+  std::cout << "trange syntax" << std::endl;
   for (const auto& elem : tqdm::trange(5)) {
-    std::cout << elem << std::endl;
     sleep(1);
   }
 
+  std::cout << "manual update" << std::endl;
+  {
+    auto tqdm = tqdm::Tqdm<int>(100);
+    auto pbar = tqdm.begin();
+    for (int i = 0; i < 10; i++) {
+      sleep(1);
+      pbar.update(10);
+    }
+  }
+
   return 0;
 }

tqdm-cpp.hpp

@@ -56,8 +56,14 @@ class Tqdm {
     bool operator==(const iterator& rhs) { return _ptr == rhs._ptr; }
     bool operator!=(const iterator& rhs) { return _ptr != rhs._ptr; }
 
-    iterator operator++();
-
+    void update(int n);
+    iterator operator++() {
+      // The same with usual iterators
+      iterator i = *this;
+      _ptr++;
+      update(1);
+      return i;
+    };
     iterator operator++(int junk) {
       _ptr++;
 
@@ -113,13 +119,8 @@ class Tqdm {
 };
 
 template <typename T>
-typename Tqdm<T>::iterator Tqdm<T>::iterator::operator++() {
-  // The same with usual iterators
-  iterator i = *this;
-  _ptr++;
-
-  // ----- custom ----- //
-  _counter++;
+void Tqdm<T>::iterator::update(int n) {
+  _counter = _counter + n;
 
   std::cout << "\r";
 
@@ -168,9 +169,6 @@ typename Tqdm<T>::iterator Tqdm<T>::iterator::operator++() {
             << std::flush;
 
   _pre_time = curr_time;
-  // ----- custom ----- //
-
-  return i;
 }
 
 Tqdm<int> trange(int num) {