From 110f506ec0dd10999ed685c87c609553cb162028 Mon Sep 17 00:00:00 2001 From: omar Date: Thu, 19 Mar 2020 18:35:08 +0100 Subject: [PATCH] Comments in imgui.h --- imgui.h | 50 +++++++++++++++++++++++++++++--------------------- 1 file changed, 29 insertions(+), 21 deletions(-) diff --git a/imgui.h b/imgui.h index d45e873bf..44a011d69 100644 --- a/imgui.h +++ b/imgui.h @@ -112,6 +112,7 @@ Index of this file: // Forward declarations and basic types //----------------------------------------------------------------------------- +// Forward declarations struct ImDrawChannel; // Temporary storage to output draw commands out of order, used by ImDrawListSplitter and ImDrawList::ChannelsSplit() struct ImDrawCmd; // A single draw command within a parent ImDrawList (generally maps to 1 GPU draw call, unless it is a callback) struct ImDrawData; // All draw command lists required to render the frame + pos/size coordinates to use for the projection matrix. @@ -135,19 +136,12 @@ struct ImGuiSizeCallbackData; // Callback data when using SetNextWindowSiz struct ImGuiStorage; // Helper for key->value storage struct ImGuiStyle; // Runtime data for styling/colors struct ImGuiTextBuffer; // Helper to hold and append into a text buffer (~string builder) -struct ImGuiTextFilter; // Helper to parse and apply text filters (e.g. "aaaaa[,bbbb][,ccccc]") +struct ImGuiTextFilter; // Helper to parse and apply text filters (e.g. "aaaaa[,bbbbb][,ccccc]") -// Typedefs and Enums/Flags (declared as int for compatibility with old C++, to allow using as flags and to not pollute the top of this file) -// Use your programming IDE "Go to definition" facility on the names in the central column below to find the actual flags/enum lists. -#ifndef ImTextureID -typedef void* ImTextureID; // User data to identify a texture (this is whatever to you want it to be! read the FAQ about ImTextureID in imgui.cpp) -#endif -typedef unsigned int ImGuiID; // Unique ID used by widgets (typically hashed from a stack of string) -#ifndef ImWchar -#define ImWchar ImWchar16 -#endif -typedef unsigned short ImWchar16; // A single U16 character for keyboard input/display. We encode them as multi bytes UTF-8 when used in strings. -typedef unsigned int ImWchar32; // A single U32 character for keyboard input/display. Define ImWchar to ImWchar32 to use it. See imconfig.h . +// Enums/Flags (declared as int for compatibility with old C++, to allow using as flags and to not pollute the top of this file) +// - Tip: Use your programming IDE navigation facilities on the names in the _central column_ below to find the actual flags/enum lists! +// In Visual Studio IDE: CTRL+comma ("Edit.NavigateTo") can follow symbols in comments, whereas CTRL+F12 ("Edit.GoToImplementation") cannot. +// With Visual Assist installed: ALT+G ("VAssistX.GoToImplementation") can also follow symbols in comments. typedef int ImGuiCol; // -> enum ImGuiCol_ // Enum: A color identifier for styling typedef int ImGuiCond; // -> enum ImGuiCond_ // Enum: A condition for many Set*() functions typedef int ImGuiDataType; // -> enum ImGuiDataType_ // Enum: A primary data type @@ -174,10 +168,21 @@ typedef int ImGuiTabBarFlags; // -> enum ImGuiTabBarFlags_ // Flags: f typedef int ImGuiTabItemFlags; // -> enum ImGuiTabItemFlags_ // Flags: for BeginTabItem() typedef int ImGuiTreeNodeFlags; // -> enum ImGuiTreeNodeFlags_ // Flags: for TreeNode(), TreeNodeEx(), CollapsingHeader() typedef int ImGuiWindowFlags; // -> enum ImGuiWindowFlags_ // Flags: for Begin(), BeginChild() + +// Other types +#ifndef ImTextureID // ImTextureID [configurable type: override in imconfig.h] +typedef void* ImTextureID; // User data for rendering back-end to identify a texture. This is whatever to you want it to be! read the FAQ about ImTextureID for details. +#endif +#ifndef ImWchar // ImWchar [configurable type: override in imconfig.h] +#define ImWchar ImWchar16 // Storage for a single decoded character/code point, default to 16-bit. Set to ImWchar32 to support larger Unicode planes. Note that we generally support UTF-8 encoded string, this is storage for a decoded character. +#endif +typedef unsigned int ImGuiID; // A unique ID used by widgets, typically hashed from a stack of string. +typedef unsigned short ImWchar16; // A single decoded U16 character/code point for keyboard input/display. We encode them as multi bytes UTF-8 when used in strings. +typedef unsigned int ImWchar32; // A single decoded U32 character/code point for keyboard input/display. To enable, use '#define ImWchar ImWchar32' in imconfig.h. typedef int (*ImGuiInputTextCallback)(ImGuiInputTextCallbackData *data); typedef void (*ImGuiSizeCallback)(ImGuiSizeCallbackData* data); -// Scalar data types +// Basic scalar data types typedef signed char ImS8; // 8-bit signed integer typedef unsigned char ImU8; // 8-bit unsigned integer typedef signed short ImS16; // 16-bit signed integer @@ -196,7 +201,7 @@ typedef signed long long ImS64; // 64-bit signed integer (post C++11) typedef unsigned long long ImU64; // 64-bit unsigned integer (post C++11) #endif -// 2D vector (often used to store positions, sizes, etc.) +// 2D vector (often used to store positions or sizes) struct ImVec2 { float x, y; @@ -234,7 +239,6 @@ namespace ImGui IMGUI_API void DestroyContext(ImGuiContext* ctx = NULL); // NULL = destroy current context IMGUI_API ImGuiContext* GetCurrentContext(); IMGUI_API void SetCurrentContext(ImGuiContext* ctx); - IMGUI_API bool DebugCheckVersionAndDataLayout(const char* version_str, size_t sz_io, size_t sz_style, size_t sz_vec2, size_t sz_vec4, size_t sz_drawvert, size_t sz_drawidx); // Main IMGUI_API ImGuiIO& GetIO(); // access the IO structure (mouse/keyboard/gamepad inputs, time, various configuration options/flags) @@ -633,7 +637,7 @@ namespace ImGui IMGUI_API void LogText(const char* fmt, ...) IM_FMTARGS(1); // pass text data straight to log (without being displayed) // Drag and Drop - // [BETA API] API may evolve! + // - [BETA API] API may evolve! IMGUI_API bool BeginDragDropSource(ImGuiDragDropFlags flags = 0); // call when the current item is active. If this return true, you can call SetDragDropPayload() + EndDragDropSource() IMGUI_API bool SetDragDropPayload(const char* type, const void* data, size_t sz, ImGuiCond cond = 0); // type is a user defined string of maximum 32 characters. Strings starting with '_' are reserved for dear imgui internal types. Data is copied and held by imgui. IMGUI_API void EndDragDropSource(); // only call EndDragDropSource() if BeginDragDropSource() returns true! @@ -726,7 +730,8 @@ namespace ImGui IMGUI_API void SetMouseCursor(ImGuiMouseCursor cursor_type); // set desired cursor type IMGUI_API void CaptureMouseFromApp(bool want_capture_mouse_value = true); // attention: misleading name! manually override io.WantCaptureMouse flag next frame (said flag is entirely left for your application to handle). This is equivalent to setting "io.WantCaptureMouse = want_capture_mouse_value;" after the next NewFrame() call. - // Clipboard Utilities (also see the LogToClipboard() function to capture or output text data to the clipboard) + // Clipboard Utilities + // - Also see the LogToClipboard() function to capture GUI into clipboard, or easily output text data to the clipboard. IMGUI_API const char* GetClipboardText(); IMGUI_API void SetClipboardText(const char* text); @@ -738,6 +743,9 @@ namespace ImGui IMGUI_API void SaveIniSettingsToDisk(const char* ini_filename); // this is automatically called (if io.IniFilename is not empty) a few seconds after any modification that should be reflected in the .ini file (and also by DestroyContext). IMGUI_API const char* SaveIniSettingsToMemory(size_t* out_ini_size = NULL); // return a zero-terminated string with the .ini data which you can save by your own mean. call when io.WantSaveIniSettings is set, then save data by your own mean and clear io.WantSaveIniSettings. + // Debug Utilities + IMGUI_API bool DebugCheckVersionAndDataLayout(const char* version_str, size_t sz_io, size_t sz_style, size_t sz_vec2, size_t sz_vec4, size_t sz_drawvert, size_t sz_drawidx); // This is called by IMGUI_CHECKVERSION() macro. + // Memory Allocators // - All those functions are not reliant on the current context. // - If you reload the contents of imgui.cpp at runtime, you may need to call SetCurrentContext() + SetAllocatorFunctions() again because we use global storage for those. @@ -1825,7 +1833,7 @@ struct ImColor // Hold a series of drawing commands. The user provides a renderer for ImDrawData which essentially contains an array of ImDrawList. //----------------------------------------------------------------------------- -// Draw callbacks for advanced uses. +// ImDrawCallback: Draw callbacks for advanced uses [configurable type: override in imconfig.h] // NB: You most likely do NOT need to use draw callbacks just to create your own widget or customized UI rendering, // you can poke into the draw list for that! Draw callback may be useful for example to: // A) Change your GPU render state, @@ -1858,9 +1866,9 @@ struct ImDrawCmd ImDrawCmd() { ElemCount = 0; TextureId = (ImTextureID)NULL; VtxOffset = IdxOffset = 0; UserCallback = NULL; UserCallbackData = NULL; } }; -// Vertex index -// (to allow large meshes with 16-bit indices: set 'io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset' and handle ImDrawCmd::VtxOffset in the renderer back-end) -// (to use 32-bit indices: override with '#define ImDrawIdx unsigned int' in imconfig.h) +// Vertex index, default to 16-bit +// To allow large meshes with 16-bit indices: set 'io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset' and handle ImDrawCmd::VtxOffset in the renderer back-end (recommended). +// To use 32-bit indices: override with '#define ImDrawIdx unsigned int' in imconfig.h. #ifndef ImDrawIdx typedef unsigned short ImDrawIdx; #endif