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Demo: Comment about 'static' and some tweaks (#1267)

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This commit is contained in:
omar 2017-08-06 11:07:52 +08:00
parent 46c73cccff
commit cdea8ca94f
1 changed files with 13 additions and 5 deletions
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18
imgui_demo.cpp
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@ -6,14 +6,18 @@
// Everything in this file will be stripped out by the linker if you don't call ImGui::ShowTestWindow().
// During development, you can call ImGui::ShowTestWindow() in your code to learn about various features of ImGui. Have it wired in a debug menu!
// Removing this file from your project is hindering access to documentation for everyone in your team, likely leading you to poorer usage of the library.
// Note that you can #define IMGUI_DISABLE_TEST_WINDOWS in imconfig.h for the same effect.
// If you want to link core ImGui in your public builds but not those test windows, #define IMGUI_DISABLE_TEST_WINDOWS in imconfig.h and those functions will be empty.
// For any other case, if you have ImGui available you probably want this to be available for reference and execution.
// Thank you,
// -Your beloved friend, imgui_demo.cpp (that you won't delete)
// Message to beginner C/C++ programmer about the meaning of 'static': in this demo code, we frequently we use 'static' variables inside functions.
// We do this as a way to gather code and data in the same place, make the demo code faster to read, faster to write, and smaller. A static variable persist across calls,
// so it is essentially like a global variable but declared inside the scope of the function.
// It also happens to be a convenient way of storing simple UI related information as long as your function doesn't need to be reentrant or used in threads.
// This may be a pattern you want to use in your code (simple is beautiful!), but most of the real data you would be editing is likely to be stored outside your function.
#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)
#define _CRT_SECURE_NO_WARNINGS
#endif
@ -538,9 +542,13 @@ void ImGui::ShowTestWindow(bool* p_open)
ImGui::TreePop();
}
static bool a=false;
if (ImGui::Button("Button")) { printf("Clicked\n"); a ^= 1; }
if (a)
static bool my_toggle = false;
if (ImGui::Button("Button"))
{
printf("Clicked\n");
my_toggle = !my_toggle;
}
if (my_toggle)
{
ImGui::SameLine();
ImGui::Text("Thanks for clicking me!");