Examples: Using Dark theme by default. (#707). Tweaked demo code.

examples/allegro5_example/main.cpp

@@ -26,8 +26,8 @@ int main(int, char**)
     ImGui_ImplA5_Init(display);
 
     // Setup style
-    ImGui::StyleColorsClassic();
-    //ImGui::StyleColorsDark();
+    ImGui::StyleColorsDark();
+    //ImGui::StyleColorsClassic();
 
     // Load Fonts
     // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them. 
@@ -76,25 +76,33 @@ int main(int, char**)
         // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets automatically appears in a window called "Debug".
         {
             static float f = 0.0f;
-            ImGui::Text("Hello, world!");                           // Some text (you can use a format string too)
-            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float as a slider from 0.0f to 1.0f
-            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats as a color
-            if (ImGui::Button("Demo Window"))                       // Use buttons to toggle our bools. We could use Checkbox() as well.
-                show_demo_window ^= 1;
-            if (ImGui::Button("Another Window"))
-                show_another_window ^= 1;
+            static int counter = 0;
+            ImGui::Text("Hello, world!");                           // Display some text (you can use a format string too)
+            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float using a slider from 0.0f to 1.0f    
+            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
+
+            ImGui::Checkbox("Demo Window", &show_demo_window);      // Edit bools storing our windows open/close state
+            ImGui::Checkbox("Another Window", &show_another_window);
+
+            if (ImGui::Button("Button"))                            // Buttons return true when clicked (NB: most widgets return true when edited/activated)
+                counter++;
+            ImGui::SameLine();
+            ImGui::Text("counter = %d", counter);
+
             ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
         }
 
-        // 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name the window.
+        // 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name your windows.
         if (show_another_window)
         {
             ImGui::Begin("Another Window", &show_another_window);
             ImGui::Text("Hello from another window!");
+            if (ImGui::Button("Close Me"))
+                show_another_window = false;
             ImGui::End();
         }
 
-        // 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow().
+        // 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow(). Read its code to learn more about Dear ImGui!
         if (show_demo_window)
         {
             ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiCond_FirstUseEver); // Normally user code doesn't need/want to call this because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly!

examples/directx10_example/main.cpp

@@ -123,8 +123,8 @@ int main(int, char**)
     ImGui_ImplDX10_Init(hwnd, g_pd3dDevice);
 
     // Setup style
-    ImGui::StyleColorsClassic();
-    //ImGui::StyleColorsDark();
+    ImGui::StyleColorsDark();
+    //ImGui::StyleColorsClassic();
 
     // Load Fonts
     // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them. 
@@ -167,25 +167,33 @@ int main(int, char**)
         // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets automatically appears in a window called "Debug".
         {
             static float f = 0.0f;
-            ImGui::Text("Hello, world!");                           // Some text (you can use a format string too)
-            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float as a slider from 0.0f to 1.0f
-            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats as a color
-            if (ImGui::Button("Demo Window"))                       // Use buttons to toggle our bools. We could use Checkbox() as well.
-                show_demo_window ^= 1;
-            if (ImGui::Button("Another Window"))
-                show_another_window ^= 1;
+            static int counter = 0;
+            ImGui::Text("Hello, world!");                           // Display some text (you can use a format string too)
+            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float using a slider from 0.0f to 1.0f    
+            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
+
+            ImGui::Checkbox("Demo Window", &show_demo_window);      // Edit bools storing our windows open/close state
+            ImGui::Checkbox("Another Window", &show_another_window);
+
+            if (ImGui::Button("Button"))                            // Buttons return true when clicked (NB: most widgets return true when edited/activated)
+                counter++;
+            ImGui::SameLine();
+            ImGui::Text("counter = %d", counter);
+
             ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
         }
 
-        // 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name the window.
+        // 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name your windows.
         if (show_another_window)
         {
             ImGui::Begin("Another Window", &show_another_window);
             ImGui::Text("Hello from another window!");
+            if (ImGui::Button("Close Me"))
+                show_another_window = false;
             ImGui::End();
         }
 
-        // 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow().
+        // 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow(). Read its code to learn more about Dear ImGui!
         if (show_demo_window)
         {
             ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiCond_FirstUseEver); // Normally user code doesn't need/want to call this because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly!

examples/directx11_example/main.cpp

@@ -126,8 +126,8 @@ int main(int, char**)
     ImGui_ImplDX11_Init(hwnd, g_pd3dDevice, g_pd3dDeviceContext);
 
     // Setup style
-    ImGui::StyleColorsClassic();
-    //ImGui::StyleColorsDark();
+    ImGui::StyleColorsDark();
+    //ImGui::StyleColorsClassic();
 
     // Load Fonts
     // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them. 
@@ -170,25 +170,33 @@ int main(int, char**)
         // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets automatically appears in a window called "Debug".
         {
             static float f = 0.0f;
-            ImGui::Text("Hello, world!");                           // Some text (you can use a format string too)
-            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float as a slider from 0.0f to 1.0f
-            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats as a color
-            if (ImGui::Button("Demo Window"))                       // Use buttons to toggle our bools. We could use Checkbox() as well.
-                show_demo_window ^= 1;
-            if (ImGui::Button("Another Window"))
-                show_another_window ^= 1;
+            static int counter = 0;
+            ImGui::Text("Hello, world!");                           // Display some text (you can use a format string too)
+            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float using a slider from 0.0f to 1.0f    
+            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
+
+            ImGui::Checkbox("Demo Window", &show_demo_window);      // Edit bools storing our windows open/close state
+            ImGui::Checkbox("Another Window", &show_another_window);
+
+            if (ImGui::Button("Button"))                            // Buttons return true when clicked (NB: most widgets return true when edited/activated)
+                counter++;
+            ImGui::SameLine();
+            ImGui::Text("counter = %d", counter);
+
             ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
         }
 
-        // 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name the window.
+        // 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name your windows.
         if (show_another_window)
         {
             ImGui::Begin("Another Window", &show_another_window);
             ImGui::Text("Hello from another window!");
+            if (ImGui::Button("Close Me"))
+                show_another_window = false;
             ImGui::End();
         }
 
-        // 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow().
+        // 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow(). Read its code to learn more about Dear ImGui!
         if (show_demo_window)
         {
             ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiCond_FirstUseEver); // Normally user code doesn't need/want to call this because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly!

examples/directx9_example/main.cpp

@@ -78,8 +78,8 @@ int main(int, char**)
     ImGui_ImplDX9_Init(hwnd, g_pd3dDevice);
 
     // Setup style
-    ImGui::StyleColorsClassic();
-    //ImGui::StyleColorsDark();
+    ImGui::StyleColorsDark();
+    //ImGui::StyleColorsClassic();
 
     // Load Fonts
     // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them. 
@@ -124,25 +124,33 @@ int main(int, char**)
         // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets automatically appears in a window called "Debug".
         {
             static float f = 0.0f;
-            ImGui::Text("Hello, world!");                           // Some text (you can use a format string too)
-            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float as a slider from 0.0f to 1.0f
-            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats as a color
-            if (ImGui::Button("Demo Window"))                       // Use buttons to toggle our bools. We could use Checkbox() as well.
-                show_demo_window ^= 1;
-            if (ImGui::Button("Another Window"))
-                show_another_window ^= 1;
+            static int counter = 0;
+            ImGui::Text("Hello, world!");                           // Display some text (you can use a format string too)
+            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float using a slider from 0.0f to 1.0f    
+            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
+
+            ImGui::Checkbox("Demo Window", &show_demo_window);      // Edit bools storing our windows open/close state
+            ImGui::Checkbox("Another Window", &show_another_window);
+
+            if (ImGui::Button("Button"))                            // Buttons return true when clicked (NB: most widgets return true when edited/activated)
+                counter++;
+            ImGui::SameLine();
+            ImGui::Text("counter = %d", counter);
+
             ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
         }
 
-        // 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name the window.
+        // 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name your windows.
         if (show_another_window)
         {
             ImGui::Begin("Another Window", &show_another_window);
             ImGui::Text("Hello from another window!");
+            if (ImGui::Button("Close Me"))
+                show_another_window = false;
             ImGui::End();
         }
 
-        // 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow().
+        // 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow(). Read its code to learn more about Dear ImGui!
         if (show_demo_window)
         {
             ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiCond_FirstUseEver); // Normally user code doesn't need/want to call this because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly!

examples/marmalade_example/main.cpp

@@ -18,8 +18,8 @@ int main(int, char**)
     ImGui_Marmalade_Init(true);
 
     // Setup style
-    ImGui::StyleColorsClassic();
-    //ImGui::StyleColorsDark();
+    ImGui::StyleColorsDark();
+    //ImGui::StyleColorsClassic();
 
     // Load Fonts
     // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them. 
@@ -59,25 +59,33 @@ int main(int, char**)
         // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets automatically appears in a window called "Debug".
         {
             static float f = 0.0f;
-            ImGui::Text("Hello, world!");                           // Some text (you can use a format string too)
-            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float as a slider from 0.0f to 1.0f
-            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats as a color
-            if (ImGui::Button("Demo Window"))                       // Use buttons to toggle our bools. We could use Checkbox() as well.
-                show_demo_window ^= 1;
-            if (ImGui::Button("Another Window"))
-                show_another_window ^= 1;
+            static int counter = 0;
+            ImGui::Text("Hello, world!");                           // Display some text (you can use a format string too)
+            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float using a slider from 0.0f to 1.0f    
+            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
+
+            ImGui::Checkbox("Demo Window", &show_demo_window);      // Edit bools storing our windows open/close state
+            ImGui::Checkbox("Another Window", &show_another_window);
+
+            if (ImGui::Button("Button"))                            // Buttons return true when clicked (NB: most widgets return true when edited/activated)
+                counter++;
+            ImGui::SameLine();
+            ImGui::Text("counter = %d", counter);
+
             ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
         }
 
-        // 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name the window.
+        // 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name your windows.
         if (show_another_window)
         {
             ImGui::Begin("Another Window", &show_another_window);
             ImGui::Text("Hello from another window!");
+            if (ImGui::Button("Close Me"))
+                show_another_window = false;
             ImGui::End();
         }
 
-        // 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow().
+        // 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow(). Read its code to learn more about Dear ImGui!
         if (show_demo_window)
         {
             ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiCond_FirstUseEver); // Normally user code doesn't need/want to call this because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly!

examples/opengl2_example/main.cpp

@@ -30,8 +30,8 @@ int main(int, char**)
     ImGui_ImplGlfwGL2_Init(window, true);
 
     // Setup style
-    ImGui::StyleColorsClassic();
-    //ImGui::StyleColorsDark();
+    ImGui::StyleColorsDark();
+    //ImGui::StyleColorsClassic();
 
     // Load Fonts
     // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them. 
@@ -67,25 +67,33 @@ int main(int, char**)
         // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets automatically appears in a window called "Debug".
         {
             static float f = 0.0f;
-            ImGui::Text("Hello, world!");                           // Some text (you can use a format string too)
-            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float as a slider from 0.0f to 1.0f
-            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats as a color
-            if (ImGui::Button("Demo Window"))                       // Use buttons to toggle our bools. We could use Checkbox() as well.
-                show_demo_window ^= 1;
-            if (ImGui::Button("Another Window"))
-                show_another_window ^= 1;
+            static int counter = 0;
+            ImGui::Text("Hello, world!");                           // Display some text (you can use a format string too)
+            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float using a slider from 0.0f to 1.0f    
+            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
+
+            ImGui::Checkbox("Demo Window", &show_demo_window);      // Edit bools storing our windows open/close state
+            ImGui::Checkbox("Another Window", &show_another_window);
+
+            if (ImGui::Button("Button"))                            // Buttons return true when clicked (NB: most widgets return true when edited/activated)
+                counter++;
+            ImGui::SameLine();
+            ImGui::Text("counter = %d", counter);
+
             ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
         }
 
-        // 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name the window.
+        // 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name your windows.
         if (show_another_window)
         {
             ImGui::Begin("Another Window", &show_another_window);
             ImGui::Text("Hello from another window!");
+            if (ImGui::Button("Close Me"))
+                show_another_window = false;
             ImGui::End();
         }
 
-        // 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow().
+        // 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow(). Read its code to learn more about Dear ImGui!
         if (show_demo_window)
         {
             ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiCond_FirstUseEver); // Normally user code doesn't need/want to call this because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly!

examples/opengl3_example/main.cpp

@@ -35,8 +35,8 @@ int main(int, char**)
     ImGui_ImplGlfwGL3_Init(window, true);
 
     // Setup style
-    ImGui::StyleColorsClassic();
-    //ImGui::StyleColorsDark();
+    ImGui::StyleColorsDark();
+    //ImGui::StyleColorsClassic();
 
     // Load Fonts
     // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them. 
@@ -72,25 +72,33 @@ int main(int, char**)
         // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets automatically appears in a window called "Debug".
         {
             static float f = 0.0f;
-            ImGui::Text("Hello, world!");                           // Some text (you can use a format string too)
-            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float as a slider from 0.0f to 1.0f
-            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats as a color
-            if (ImGui::Button("Demo Window"))                       // Use buttons to toggle our bools. We could use Checkbox() as well.
-                show_demo_window ^= 1;
-            if (ImGui::Button("Another Window")) 
-                show_another_window ^= 1;
+            static int counter = 0;
+            ImGui::Text("Hello, world!");                           // Display some text (you can use a format string too)
+            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float using a slider from 0.0f to 1.0f    
+            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
+
+            ImGui::Checkbox("Demo Window", &show_demo_window);      // Edit bools storing our windows open/close state
+            ImGui::Checkbox("Another Window", &show_another_window);
+
+            if (ImGui::Button("Button"))                            // Buttons return true when clicked (NB: most widgets return true when edited/activated)
+                counter++;
+            ImGui::SameLine();
+            ImGui::Text("counter = %d", counter);
+
             ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
         }
 
-        // 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name the window.
+        // 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name your windows.
         if (show_another_window)
         {
             ImGui::Begin("Another Window", &show_another_window);
             ImGui::Text("Hello from another window!");
+            if (ImGui::Button("Close Me"))
+                show_another_window = false;
             ImGui::End();
         }
 
-        // 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow().
+        // 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow(). Read its code to learn more about Dear ImGui!
         if (show_demo_window)
         {
             ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiCond_FirstUseEver); // Normally user code doesn't need/want to call this because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly!

examples/sdl_opengl2_example/main.cpp

@@ -36,8 +36,8 @@ int main(int, char**)
     ImGui_ImplSdlGL2_Init(window);
 
     // Setup style
-    ImGui::StyleColorsClassic();
-    //ImGui::StyleColorsDark();
+    ImGui::StyleColorsDark();
+    //ImGui::StyleColorsClassic();
 
     // Load Fonts
     // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them. 
@@ -76,29 +76,37 @@ int main(int, char**)
         }
         ImGui_ImplSdlGL2_NewFrame(window);
 
-        // 1. Show a simple window
+        // 1. Show a simple window.
         // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets automatically appears in a window called "Debug".
         {
             static float f = 0.0f;
-            ImGui::Text("Hello, world!");                           // Some text (you can use a format string too)
-            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float as a slider from 0.0f to 1.0f
-            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats as a color
-            if (ImGui::Button("Demo Window"))                       // Use buttons to toggle our bools. We could use Checkbox() as well.
-                show_demo_window ^= 1;
-            if (ImGui::Button("Another Window"))
-                show_another_window ^= 1;
+            static int counter = 0;
+            ImGui::Text("Hello, world!");                           // Display some text (you can use a format string too)
+            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float using a slider from 0.0f to 1.0f    
+            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
+
+            ImGui::Checkbox("Demo Window", &show_demo_window);      // Edit bools storing our windows open/close state
+            ImGui::Checkbox("Another Window", &show_another_window);
+
+            if (ImGui::Button("Button"))                            // Buttons return true when clicked (NB: most widgets return true when edited/activated)
+                counter++;
+            ImGui::SameLine();
+            ImGui::Text("counter = %d", counter);
+
             ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
         }
 
-        // 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name the window.
+        // 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name your windows.
         if (show_another_window)
         {
             ImGui::Begin("Another Window", &show_another_window);
             ImGui::Text("Hello from another window!");
+            if (ImGui::Button("Close Me"))
+                show_another_window = false;
             ImGui::End();
         }
 
-        // 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow().
+        // 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow(). Read its code to learn more about Dear ImGui!
         if (show_demo_window)
         {
             ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiCond_FirstUseEver); // Normally user code doesn't need/want to call this because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly!

examples/sdl_opengl3_example/main.cpp

@@ -36,8 +36,8 @@ int main(int, char**)
     ImGui_ImplSdlGL3_Init(window);
 
     // Setup style
-    ImGui::StyleColorsClassic();
-    //ImGui::StyleColorsDark();
+    ImGui::StyleColorsDark();
+    //ImGui::StyleColorsClassic();
 
     // Load Fonts
     // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them. 
@@ -80,25 +80,33 @@ int main(int, char**)
         // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets automatically appears in a window called "Debug".
         {
             static float f = 0.0f;
-            ImGui::Text("Hello, world!");                           // Some text (you can use a format string too)
-            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float as a slider from 0.0f to 1.0f
-            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats as a color
-            if (ImGui::Button("Demo Window"))                       // Use buttons to toggle our bools. We could use Checkbox() as well.
-                show_demo_window ^= 1;
-            if (ImGui::Button("Another Window"))
-                show_another_window ^= 1;
+            static int counter = 0;
+            ImGui::Text("Hello, world!");                           // Display some text (you can use a format string too)
+            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float using a slider from 0.0f to 1.0f    
+            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
+
+            ImGui::Checkbox("Demo Window", &show_demo_window);      // Edit bools storing our windows open/close state
+            ImGui::Checkbox("Another Window", &show_another_window);
+
+            if (ImGui::Button("Button"))                            // Buttons return true when clicked (NB: most widgets return true when edited/activated)
+                counter++;
+            ImGui::SameLine();
+            ImGui::Text("counter = %d", counter);
+
             ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
         }
 
-        // 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name the window.
+        // 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name your windows.
         if (show_another_window)
         {
             ImGui::Begin("Another Window", &show_another_window);
             ImGui::Text("Hello from another window!");
+            if (ImGui::Button("Close Me"))
+                show_another_window = false;
             ImGui::End();
         }
 
-        // 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow().
+        // 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow(). Read its code to learn more about Dear ImGui!
         if (show_demo_window)
         {
             ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiCond_FirstUseEver); // Normally user code doesn't need/want to call this because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly!

examples/vulkan_example/main.cpp

@@ -625,8 +625,8 @@ int main(int, char**)
     ImGui_ImplGlfwVulkan_Init(window, true, &init_data);
 
     // Setup style
-    ImGui::StyleColorsClassic();
-    //ImGui::StyleColorsDark();
+    ImGui::StyleColorsDark();
+    //ImGui::StyleColorsClassic();
 
     // Load Fonts
     // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them. 
@@ -700,25 +700,33 @@ int main(int, char**)
         // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets automatically appears in a window called "Debug".
         {
             static float f = 0.0f;
-            ImGui::Text("Hello, world!");                           // Some text (you can use a format string too)
-            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float as a slider from 0.0f to 1.0f
-            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats as a color
-            if (ImGui::Button("Demo Window"))                       // Use buttons to toggle our bools. We could use Checkbox() as well.
-                show_demo_window ^= 1;
-            if (ImGui::Button("Another Window"))
-                show_another_window ^= 1;
+            static int counter = 0;
+            ImGui::Text("Hello, world!");                           // Display some text (you can use a format string too)
+            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float using a slider from 0.0f to 1.0f    
+            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
+
+            ImGui::Checkbox("Demo Window", &show_demo_window);      // Edit bools storing our windows open/close state
+            ImGui::Checkbox("Another Window", &show_another_window);
+
+            if (ImGui::Button("Button"))                            // Buttons return true when clicked (NB: most widgets return true when edited/activated)
+                counter++;
+            ImGui::SameLine();
+            ImGui::Text("counter = %d", counter);
+
             ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
         }
 
-        // 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name the window.
+        // 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name your windows.
         if (show_another_window)
         {
             ImGui::Begin("Another Window", &show_another_window);
             ImGui::Text("Hello from another window!");
+            if (ImGui::Button("Close Me"))
+                show_another_window = false;
             ImGui::End();
         }
 
-        // 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow().
+        // 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow(). Read its code to learn more about Dear ImGui!
         if (show_demo_window)
         {
             ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiCond_FirstUseEver); // Normally user code doesn't need/want to call this because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly!

imgui_demo.cpp

@@ -1979,7 +1979,7 @@ void ImGui::ShowDemoWindow(bool* p_open)
 // Here we use the simplified Combo() api that packs items into a single literal string. Useful for quick combo boxes where the choices are known locally.
 bool ImGui::ShowStyleSelector(const char* label)
 {
-    static int style_idx = 0;
+    static int style_idx = -1;
     if (ImGui::Combo(label, &style_idx, "Classic\0Dark\0Light\0"))
     {
         switch (style_idx)