Examples: Comments, Demo: Log early out, TODO. (#1553)

TODO.txt

@@ -17,7 +17,8 @@ It's mostly a bunch of personal notes, probably incomplete. Feel free to query i
  - window: background options for child windows, border option (disable rounding).
  - window: resizing from any sides? done. > need backends to honor mouse cursors properly. (#822)
  - window: resize from borders: support some form of outer padding to make it easier to grab borders. (#822)
- - window: begin with *p_open == false should return false.
+ - window: fix resize glitch when collapsing an AlwaysAutoResize window.
+ - window: begin with *p_open == false could return false.
  - window: get size/pos helpers given names (see discussion in #249)
  - window: a collapsed window can be stuck behind the main menu bar?
  - window: when window is very small, prioritize resize button over close button.
@@ -28,7 +29,8 @@ It's mostly a bunch of personal notes, probably incomplete. Feel free to query i
  - window: using SetWindowPos() inside Begin() and moving the window with the mouse reacts a very ugly glitch. We should just defer the SetWindowPos() call.
  - window: GetWindowSize() returns (0,0) when not calculated? (#1045)
  - window: freeze window flag: if not focused/hovered, return false, render with previous ImDrawList. and/or reduce refresh rate. 
-!- scrolling: allow immediately effective change of scroll after Begin() if we haven't appended items yet.
+ - window: investigate better auto-positioning for new windows.
+ - scrolling: allow immediately effective change of scroll after Begin() if we haven't appended items yet.
  - scrolling/clipping: separator on the initial position of a window is not visible (cursorpos.y <= clippos.y). (2017-08-20: can't repro)
 
  - drawdata: make it easy to clone (or swap?) a ImDrawData so user can easily save that data if they use threaded rendering.
@@ -218,6 +220,7 @@ It's mostly a bunch of personal notes, probably incomplete. Feel free to query i
  - drag and drop: add demo. (#143, #479)
  - drag and drop: have some way to know when a drag begin from BeginDragDropSource() pov
  - drag and drop: allow using with other mouse buttons (where activeid won't be set). (#1637)
+ - drag and drop: make it easier and provide a demo to have tooltip both are source and target site, with a more detailed one on target site (tooltip ordering problem)
  - drag and drop: test with reordering nodes (in a list, or a tree node). (#143)
  - drag and drop: test integrating with os drag and drop.
  - drag and drop: make payload optional? (#143)

examples/example_glfw_opengl3/main.cpp

@@ -7,9 +7,13 @@
 #include "imgui_impl_glfw.h"
 #include "imgui_impl_opengl3.h"
 #include <stdio.h>
-#include <GL/gl3w.h>    // This example is using gl3w to access OpenGL functions. You may freely use any other OpenGL loader such as: glew, glad, glLoadGen, etc.
+
+#include <GL/gl3w.h>    // This example is using gl3w to access OpenGL functions. You may use another OpenGL loader/header such as: glew, glext, glad, glLoadGen, etc.
 //#include <glew.h>
-#include <GLFW/glfw3.h>
+//#include <glext.h>
+//#include <glad/glad.h>
+
+#include <GLFW/glfw3.h> // Include glfw3.h after our OpenGL definitions
 
 static void glfw_error_callback(int error, const char* description)
 {

examples/example_sdl_opengl3/main.cpp

@@ -7,10 +7,13 @@
 #include "imgui_impl_sdl.h"
 #include "imgui_impl_opengl3.h"
 #include <stdio.h>
-#include <GL/gl3w.h>    // This example is using gl3w to access OpenGL functions. You may freely use any other OpenGL loader such as: glew, glad, glLoadGen, etc.
-//#include <glew.h>
 #include <SDL.h>
 
+#include <GL/gl3w.h>    // This example is using gl3w to access OpenGL functions. You may use another OpenGL loader/header such as: glew, glext, glad, glLoadGen, etc.
+//#include <glew.h>
+//#include <glext.h>
+//#include <glad/glad.h>
+
 int main(int, char**)
 {
     // Setup SDL

examples/imgui_impl_opengl3.cpp

@@ -31,8 +31,11 @@
 
 #include "imgui.h"
 #include "imgui_impl_opengl3.h"
-#include <GL/gl3w.h>    // This example is using gl3w to access OpenGL functions. You may freely use any other OpenGL loader such as: glew, glad, glLoadGen, etc.
+
+#include <GL/gl3w.h>    // This example is using gl3w to access OpenGL functions. You may use another OpenGL loader/header such as: glew, glext, glad, glLoadGen, etc.
 //#include <glew.h>
+//#include <glext.h>
+//#include <glad/glad.h>
 
 // OpenGL Data
 static char         g_GlslVersion[32] = "";

imgui_demo.cpp

@@ -2905,7 +2905,7 @@ struct ExampleAppConsole
         // Here we create a context menu only available from the title bar.
         if (ImGui::BeginPopupContextItem())
         {
-            if (ImGui::MenuItem("Close"))
+            if (ImGui::MenuItem("Close Console"))
                 *p_open = false;
             ImGui::EndPopup();
         }
@@ -3172,7 +3172,11 @@ struct ExampleAppLog
     void    Draw(const char* title, bool* p_open = NULL)
     {
         ImGui::SetNextWindowSize(ImVec2(500,400), ImGuiCond_FirstUseEver);
-        ImGui::Begin(title, p_open);
+        if (!ImGui::Begin(title, p_open))
+        {
+            ImGui::End();
+            return;
+        }
         if (ImGui::Button("Clear")) Clear();
         ImGui::SameLine();
         bool copy = ImGui::Button("Copy");