imgui.h: Comments

This commit is contained in:
omar 2018-11-27 14:10:40 +01:00
parent ce07d55d1b
commit 1fa2cb8748
1 changed files with 61 additions and 11 deletions

72
imgui.h
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@ -6,9 +6,26 @@
// Read 'Programmer guide' in imgui.cpp for notes on how to setup ImGui in your codebase.
// Get latest version at https://github.com/ocornut/imgui
/*
Index of this file:
// Header mess
// Forward declarations and basic types
// ImGui API (Dear ImGui end-user API)
// Flags & Enumerations
// ImGuiStyle
// ImGuiIO
// Misc data structures (ImGuiInputTextCallbackData, ImGuiSizeCallbackData, ImGuiPayload)
// Obsolete functions
// Helpers (ImVector, ImGuiOnceUponAFrame, ImGuiTextFilter, ImGuiTextBuffer, ImGuiStorage, ImGuiListClipper, ImColor)
// Draw List API (ImDrawCmd, ImDrawIdx, ImDrawVert, ImDrawChannel, ImDrawListFlags, ImDrawList, ImDrawData)
// Font API (ImFontConfig, ImFontGlyph, ImFontAtlasFlags, ImFontAtlas, ImFont)
*/
#pragma once
// Configuration file (edit imconfig.h or define IMGUI_USER_CONFIG to set your own filename)
// Configuration file (edit imconfig.h or define IMGUI_USER_CONFIG to your own filename)
#ifdef IMGUI_USER_CONFIG
#include IMGUI_USER_CONFIG
#endif
@ -16,6 +33,10 @@
#include "imconfig.h"
#endif
//-----------------------------------------------------------------------------
// Header mess
//-----------------------------------------------------------------------------
#include <float.h> // FLT_MAX
#include <stdarg.h> // va_list
#include <stddef.h> // ptrdiff_t, NULL
@ -36,7 +57,7 @@
#define IMGUI_IMPL_API IMGUI_API
#endif
// Helpers
// Helper Macros
#ifndef IM_ASSERT
#include <assert.h>
#define IM_ASSERT(_EXPR) assert(_EXPR) // You can override the default assert handler by editing imconfig.h
@ -51,6 +72,7 @@
#define IM_ARRAYSIZE(_ARR) ((int)(sizeof(_ARR)/sizeof(*_ARR))) // Size of a static C-style array. Don't use on pointers!
#define IM_OFFSETOF(_TYPE,_MEMBER) ((size_t)&(((_TYPE*)0)->_MEMBER)) // Offset of _MEMBER within _TYPE. Standardized as offsetof() in modern C++.
// Warnings
#if defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wold-style-cast"
@ -59,7 +81,10 @@
#pragma GCC diagnostic ignored "-Wclass-memaccess"
#endif
// Forward declarations
//-----------------------------------------------------------------------------
// Forward declarations and basic types
//-----------------------------------------------------------------------------
struct ImDrawChannel; // Temporary storage for outputting drawing commands out of order, used by ImDrawList::ChannelsSplit()
struct ImDrawCmd; // A single draw command within a parent ImDrawList (generally maps to 1 GPU draw call)
struct ImDrawData; // All draw command lists required to render the frame
@ -153,8 +178,11 @@ struct ImVec4
#endif
};
// Dear ImGui end-user API
// (In a namespace so you can add extra functions in your own separate file. Please don't modify imgui.cpp/.h!)
//-----------------------------------------------------------------------------
// ImGui: Dear ImGui end-user API
// (Inside a namespace so you can add extra functions in your own separate file. Please don't modify imgui.cpp/.h!)
//-----------------------------------------------------------------------------
namespace ImGui
{
// Context creation and access
@ -609,6 +637,10 @@ namespace ImGui
} // namespace ImGui
//-----------------------------------------------------------------------------
// Flags & Enumerations
//-----------------------------------------------------------------------------
// Flags for ImGui::Begin()
enum ImGuiWindowFlags_
{
@ -1031,7 +1063,8 @@ enum ImGuiMouseCursor_
#endif
};
// Enumateration representation a Condition for ImGui::SetWindow***(), SetNextWindow***(), SetNextTreeNode***() functions
// Enumateration for ImGui::SetWindow***(), SetNextWindow***(), SetNextTreeNode***() functions
// Represent a condition.
// Important: Treat as a regular enum! Do NOT combine multiple values using binary operators! All the functions above treat 0 as a shortcut to ImGuiCond_Always.
enum ImGuiCond_
{
@ -1046,8 +1079,13 @@ enum ImGuiCond_
#endif
};
//-----------------------------------------------------------------------------
// ImGuiStyle
// You may modify the ImGui::GetStyle() main instance during initialization and before NewFrame().
// During the frame, use ImGui::PushStyleVar(ImGuiStyleVar_XXXX)/PopStyleVar() to alter the main style values, and ImGui::PushStyleColor(ImGuiCol_XXX)/PopStyleColor() for colors.
// During the frame, use ImGui::PushStyleVar(ImGuiStyleVar_XXXX)/PopStyleVar() to alter the main style values,
// and ImGui::PushStyleColor(ImGuiCol_XXX)/PopStyleColor() for colors.
//-----------------------------------------------------------------------------
struct ImGuiStyle
{
float Alpha; // Global alpha applies to everything in ImGui.
@ -1085,8 +1123,12 @@ struct ImGuiStyle
IMGUI_API void ScaleAllSizes(float scale_factor);
};
// This is where your app communicate with Dear ImGui. Access via ImGui::GetIO().
// Read 'Programmer guide' section in .cpp file for general usage.
//-----------------------------------------------------------------------------
// ImGuiIO
// Communicate most settings and inputs/outputs to Dear ImGui using this structure.
// Access via ImGui::GetIO(). Read 'Programmer guide' section in .cpp file for general usage.
//-----------------------------------------------------------------------------
struct ImGuiIO
{
//------------------------------------------------------------------
@ -1209,6 +1251,10 @@ struct ImGuiIO
IMGUI_API ImGuiIO();
};
//-----------------------------------------------------------------------------
// Misc data structures
//-----------------------------------------------------------------------------
// Shared state of InputText(), passed as an argument to your callback when a ImGuiInputTextFlags_Callback* flag is used.
// The callback function should return 0 by default.
// Callbacks (follow a flag name and see comments in ImGuiInputTextFlags_ declarations for more details)
@ -1254,7 +1300,7 @@ struct ImGuiSizeCallbackData
ImVec2 DesiredSize; // Read-write. Desired size, based on user's mouse position. Write to this field to restrain resizing.
};
// Data payload for Drag and Drop operations
// Data payload for Drag and Drop operations: AcceptDragDropPayload(), GetDragDropPayload()
struct ImGuiPayload
{
// Members
@ -1578,7 +1624,7 @@ struct ImColor
};
//-----------------------------------------------------------------------------
// Draw List
// Draw List API (ImDrawCmd, ImDrawIdx, ImDrawVert, ImDrawChannel, ImDrawListFlags, ImDrawList, ImDrawData)
// Hold a series of drawing commands. The user provides a renderer for ImDrawData which essentially contains an array of ImDrawList.
//-----------------------------------------------------------------------------
@ -1764,6 +1810,10 @@ struct ImDrawData
IMGUI_API void ScaleClipRects(const ImVec2& sc); // Helper to scale the ClipRect field of each ImDrawCmd. Use if your final output buffer is at a different scale than ImGui expects, or if there is a difference between your window resolution and framebuffer resolution.
};
//-----------------------------------------------------------------------------
// Font API (ImFontConfig, ImFontGlyph, ImFontAtlasFlags, ImFontAtlas, ImFont)
//-----------------------------------------------------------------------------
struct ImFontConfig
{
void* FontData; // // TTF/OTF data