Examples: Added a color slider for the background color + tweak first example use of button.s

examples/directx11_example/main.cpp

@@ -540,6 +540,10 @@ int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE, LPWSTR, int)
 
     InitImGui();
 
+    bool show_test_window = true;
+    bool show_another_window = false;
+    ImVec4 clear_col(0.8f, 0.6f, 0.6f, 1.0f);
+
     // Enter the message loop
     MSG msg;
     ZeroMemory(&msg, sizeof(msg));
@@ -551,20 +555,17 @@ int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE, LPWSTR, int)
             DispatchMessage(&msg);
             continue;
         }
-        
         UpdateImGui();
 
-        static bool show_test_window = true;
-        static bool show_another_window = false;
-
         // 1. Show a simple window
         // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
         {
             static float f;
             ImGui::Text("Hello, world!");
             ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
-            show_test_window ^= ImGui::Button("Test Window");
-            show_another_window ^= ImGui::Button("Another Window");
+            ImGui::ColorEdit3("clear color", (float*)&clear_col);
+            if (ImGui::Button("Test Window")) show_test_window ^= 1;
+            if (ImGui::Button("Another Window")) show_another_window ^= 1;
 
             // Calculate and show frame rate
             static float ms_per_frame[120] = { 0 };
@@ -594,8 +595,7 @@ int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE, LPWSTR, int)
         }
 
         // Rendering
-        float clearColor[4] = { 204 / 255.f, 153 / 255.f, 153 / 255.f };
-        g_pd3dDeviceImmediateContext->ClearRenderTargetView(g_mainRenderTargetView, clearColor);
+        g_pd3dDeviceImmediateContext->ClearRenderTargetView(g_mainRenderTargetView, (float*)&clear_col);
         ImGui::Render();
         g_pSwapChain->Present(0, 0);
     }

examples/directx9_example/main.cpp

@@ -281,6 +281,10 @@ int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE, LPWSTR, int)
 
     InitImGui();
 
+    bool show_test_window = true;
+    bool show_another_window = false;
+    ImVec4 clear_col(0.8f, 0.6f, 0.6f, 1.0f);
+
     // Enter the message loop
     MSG msg;
     ZeroMemory(&msg, sizeof(msg));
@@ -292,20 +296,17 @@ int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE, LPWSTR, int)
             DispatchMessage(&msg);
             continue;
         }
-        
         UpdateImGui();
 
-        static bool show_test_window = true;
-        static bool show_another_window = false;
-
         // 1. Show a simple window
         // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
         {
             static float f;
             ImGui::Text("Hello, world!");
             ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
-            show_test_window ^= ImGui::Button("Test Window");
-            show_another_window ^= ImGui::Button("Another Window");
+            ImGui::ColorEdit3("clear color", (float*)&clear_col);
+            if (ImGui::Button("Test Window")) show_test_window ^= 1;
+            if (ImGui::Button("Another Window")) show_another_window ^= 1;
 
             // Calculate and show frame rate
             static float ms_per_frame[120] = { 0 };
@@ -330,7 +331,7 @@ int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE, LPWSTR, int)
         // 3. Show the ImGui test window. Most of the sample code is in ImGui::ShowTestWindow()
         if (show_test_window)
         {
-			ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiSetCondition_FirstUseEver);
+            ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiSetCondition_FirstUseEver);
             ImGui::ShowTestWindow(&show_test_window);
         }
 
@@ -338,7 +339,8 @@ int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE, LPWSTR, int)
         g_pd3dDevice->SetRenderState(D3DRS_ZENABLE, false);
         g_pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, false);
         g_pd3dDevice->SetRenderState(D3DRS_SCISSORTESTENABLE, false);
-        g_pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, D3DCOLOR_XRGB(204, 153, 153), 1.0f, 0);
+        D3DCOLOR clear_col_dx = D3DCOLOR_RGBA((int)(clear_col.x*255.0f), (int)(clear_col.y*255.0f), (int)(clear_col.z*255.0f), (int)(clear_col.w*255.0f));
+        g_pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, clear_col_dx, 1.0f, 0);
         if (g_pd3dDevice->BeginScene() >= 0)
         {
             ImGui::Render();

examples/opengl3_example/main.cpp

@@ -169,7 +169,7 @@ void InitGL()
     glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
     glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
-    window = glfwCreateWindow(1280, 720, "ImGui OpenGL example", NULL, NULL);
+    window = glfwCreateWindow(1280, 720, "ImGui OpenGL3 example", NULL, NULL);
     glfwMakeContextCurrent(window);
     glfwSetKeyCallback(window, glfw_key_callback);
     glfwSetMouseButtonCallback(window, glfw_mouse_button_callback);
@@ -321,6 +321,10 @@ int main(int argc, char** argv)
     InitGL();
     InitImGui();
 
+    bool show_test_window = true;
+    bool show_another_window = false;
+    ImVec4 clear_col(0.8f, 0.6f, 0.6f, 1.0f);
+
     while (!glfwWindowShouldClose(window))
     {
         ImGuiIO& io = ImGui::GetIO();
@@ -329,17 +333,15 @@ int main(int argc, char** argv)
         glfwPollEvents();
         UpdateImGui();
 
-        static bool show_test_window = true;
-        static bool show_another_window = false;
-
         // 1. Show a simple window
         // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
         {
             static float f;
             ImGui::Text("Hello, world!");
             ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
-            show_test_window ^= ImGui::Button("Test Window");
-            show_another_window ^= ImGui::Button("Another Window");
+            ImGui::ColorEdit3("clear color", (float*)&clear_col);
+            if (ImGui::Button("Test Window")) show_test_window ^= 1;
+            if (ImGui::Button("Another Window")) show_another_window ^= 1;
 
             // Calculate and show frame rate
             static float ms_per_frame[120] = { 0 };
@@ -364,13 +366,13 @@ int main(int argc, char** argv)
         // 3. Show the ImGui test window. Most of the sample code is in ImGui::ShowTestWindow()
         if (show_test_window)
         {
-			ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiSetCondition_FirstUseEver);
+            ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiSetCondition_FirstUseEver);
             ImGui::ShowTestWindow(&show_test_window);
         }
         
         // Rendering
         glViewport(0, 0, (int)io.DisplaySize.x, (int)io.DisplaySize.y);
-        glClearColor(0.8f, 0.6f, 0.6f, 1.0f);
+        glClearColor(clear_col.x, clear_col.y, clear_col.z, clear_col.w);
         glClear(GL_COLOR_BUFFER_BIT);
         ImGui::Render();
         glfwSwapBuffers(window);

examples/opengl_example/main.cpp

@@ -143,7 +143,7 @@ void InitGL()
     if (!glfwInit())
         exit(1);
 
-    window = glfwCreateWindow(1280, 720, "ImGui OpenGL example", NULL, NULL);
+    window = glfwCreateWindow(1280, 720, "ImGui OpenGL2 example", NULL, NULL);
     glfwMakeContextCurrent(window);
     glfwSetKeyCallback(window, glfw_key_callback);
     glfwSetMouseButtonCallback(window, glfw_mouse_button_callback);
@@ -255,6 +255,10 @@ int main(int argc, char** argv)
     InitGL();
     InitImGui();
 
+    bool show_test_window = true;
+    bool show_another_window = false;
+    ImVec4 clear_col(0.8f, 0.6f, 0.6f, 1.0f);
+
     while (!glfwWindowShouldClose(window))
     {
         ImGuiIO& io = ImGui::GetIO();
@@ -262,17 +266,15 @@ int main(int argc, char** argv)
         glfwPollEvents();
         UpdateImGui();
 
-        static bool show_test_window = true;
-        static bool show_another_window = false;
-
         // 1. Show a simple window
         // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
         {
             static float f;
             ImGui::Text("Hello, world!");
             ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
-            show_test_window ^= ImGui::Button("Test Window");
-            show_another_window ^= ImGui::Button("Another Window");
+            ImGui::ColorEdit3("clear color", (float*)&clear_col);
+            if (ImGui::Button("Test Window")) show_test_window ^= 1;
+            if (ImGui::Button("Another Window")) show_another_window ^= 1;
 
             // Calculate and show frame rate
             static float ms_per_frame[120] = { 0 };
@@ -303,7 +305,7 @@ int main(int argc, char** argv)
 
         // Rendering
         glViewport(0, 0, (int)io.DisplaySize.x, (int)io.DisplaySize.y);
-        glClearColor(0.8f, 0.6f, 0.6f, 1.0f);
+        glClearColor(clear_col.x, clear_col.y, clear_col.z, clear_col.w);
         glClear(GL_COLOR_BUFFER_BIT);
         ImGui::Render();
         glfwSwapBuffers(window);