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Dear ImGui: Bloat-free Graphical User interface for C++ with minimal dependencies
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imgui-docking/imgui_internal.h

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// dear imgui, v1.48 WIP
// (internals)
// You may use this file to debug, understand or extend ImGui features but we don't provide any guarantee of forward compatibility!
// Implement maths operators for ImVec2 (disabled by default to not collide with using IM_VEC2_CLASS_EXTRA along with your own math types+operators)
// #define IMGUI_DEFINE_MATH_OPERATORS
#pragma once
#ifndef IMGUI_VERSION
#error Must include imgui.h before imgui_internal.h
#endif
#include <stdio.h> // FILE*
#include <math.h> // sqrtf()
#ifdef _MSC_VER
#pragma warning (push)
#pragma warning (disable: 4251) // class 'xxx' needs to have dll-interface to be used by clients of struct 'xxx' // when IMGUI_API is set to__declspec(dllexport)
#endif
//-----------------------------------------------------------------------------
// Forward Declarations
//-----------------------------------------------------------------------------
struct ImRect;
struct ImGuiColMod;
struct ImGuiStyleMod;
struct ImGuiGroupData;
struct ImGuiSimpleColumns;
struct ImGuiDrawContext;
struct ImGuiTextEditState;
struct ImGuiIniData;
struct ImGuiMouseCursorData;
struct ImGuiPopupRef;
struct ImGuiState;
struct ImGuiWindow;
typedef int ImGuiLayoutType; // enum ImGuiLayoutType_
typedef int ImGuiButtonFlags; // enum ImGuiButtonFlags_
typedef int ImGuiTreeNodeFlags; // enum ImGuiTreeNodeFlags_
typedef int ImGuiSliderFlags; // enum ImGuiSliderFlags_
//-------------------------------------------------------------------------
// STB libraries
//-------------------------------------------------------------------------
namespace ImGuiStb
{
#ifdef __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunused-function"
#pragma clang diagnostic ignored "-Wmissing-prototypes"
#endif
#undef STB_TEXTEDIT_STRING
#undef STB_TEXTEDIT_CHARTYPE
#define STB_TEXTEDIT_STRING ImGuiTextEditState
#define STB_TEXTEDIT_CHARTYPE ImWchar
#define STB_TEXTEDIT_GETWIDTH_NEWLINE -1.0f
#include "stb_textedit.h"
#ifdef __clang__
#pragma clang diagnostic pop
#endif
} // namespace ImGuiStb
//-----------------------------------------------------------------------------
// Context
//-----------------------------------------------------------------------------
extern IMGUI_API ImGuiState* GImGui;
//-----------------------------------------------------------------------------
// Helpers
//-----------------------------------------------------------------------------
#define IM_ARRAYSIZE(_ARR) ((int)(sizeof(_ARR)/sizeof(*_ARR)))
#define IM_PI 3.14159265358979323846f
// Helpers: UTF-8 <> wchar
IMGUI_API int ImTextStrToUtf8(char* buf, int buf_size, const ImWchar* in_text, const ImWchar* in_text_end); // return output UTF-8 bytes count
IMGUI_API int ImTextCharFromUtf8(unsigned int* out_char, const char* in_text, const char* in_text_end); // return input UTF-8 bytes count
IMGUI_API int ImTextStrFromUtf8(ImWchar* buf, int buf_size, const char* in_text, const char* in_text_end, const char** in_remaining = NULL); // return input UTF-8 bytes count
IMGUI_API int ImTextCountCharsFromUtf8(const char* in_text, const char* in_text_end); // return number of UTF-8 code-points (NOT bytes count)
IMGUI_API int ImTextCountUtf8BytesFromStr(const ImWchar* in_text, const ImWchar* in_text_end); // return number of bytes to express string as UTF-8 code-points
// Helpers: Misc
IMGUI_API ImU32 ImHash(const void* data, int data_size, ImU32 seed = 0); // Pass data_size==0 for zero-terminated strings
IMGUI_API void* ImLoadFileToMemory(const char* filename, const char* file_open_mode, int* out_file_size = NULL, int padding_bytes = 0);
IMGUI_API bool ImIsPointInTriangle(const ImVec2& p, const ImVec2& a, const ImVec2& b, const ImVec2& c);
static inline bool ImCharIsSpace(int c) { return c == ' ' || c == '\t' || c == 0x3000; }
static inline int ImUpperPowerOfTwo(int v) { v--; v |= v >> 1; v |= v >> 2; v |= v >> 4; v |= v >> 8; v |= v >> 16; v++; return v; }
// Helpers: String
IMGUI_API int ImStricmp(const char* str1, const char* str2);
IMGUI_API int ImStrnicmp(const char* str1, const char* str2, int count);
IMGUI_API char* ImStrdup(const char* str);
IMGUI_API int ImStrlenW(const ImWchar* str);
IMGUI_API const ImWchar*ImStrbolW(const ImWchar* buf_mid_line, const ImWchar* buf_begin); // Find beginning-of-line
IMGUI_API const char* ImStristr(const char* haystack, const char* haystack_end, const char* needle, const char* needle_end);
IMGUI_API int ImFormatString(char* buf, int buf_size, const char* fmt, ...) IM_PRINTFARGS(3);
IMGUI_API int ImFormatStringV(char* buf, int buf_size, const char* fmt, va_list args);
// Helpers: Math
// We are keeping those not leaking to the user by default, in the case the user has implicit cast operators between ImVec2 and its own types (when IM_VEC2_CLASS_EXTRA is defined)
#ifdef IMGUI_DEFINE_MATH_OPERATORS
static inline ImVec2 operator*(const ImVec2& lhs, const float rhs) { return ImVec2(lhs.x*rhs, lhs.y*rhs); }
static inline ImVec2 operator/(const ImVec2& lhs, const float rhs) { return ImVec2(lhs.x/rhs, lhs.y/rhs); }
static inline ImVec2 operator+(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(lhs.x+rhs.x, lhs.y+rhs.y); }
static inline ImVec2 operator-(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(lhs.x-rhs.x, lhs.y-rhs.y); }
static inline ImVec2 operator*(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(lhs.x*rhs.x, lhs.y*rhs.y); }
static inline ImVec2 operator/(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(lhs.x/rhs.x, lhs.y/rhs.y); }
static inline ImVec2& operator+=(ImVec2& lhs, const ImVec2& rhs) { lhs.x += rhs.x; lhs.y += rhs.y; return lhs; }
static inline ImVec2& operator-=(ImVec2& lhs, const ImVec2& rhs) { lhs.x -= rhs.x; lhs.y -= rhs.y; return lhs; }
static inline ImVec2& operator*=(ImVec2& lhs, const float rhs) { lhs.x *= rhs; lhs.y *= rhs; return lhs; }
static inline ImVec2& operator/=(ImVec2& lhs, const float rhs) { lhs.x /= rhs; lhs.y /= rhs; return lhs; }
static inline ImVec4 operator-(const ImVec4& lhs, const ImVec4& rhs) { return ImVec4(lhs.x-rhs.x, lhs.y-rhs.y, lhs.z-rhs.z, lhs.w-rhs.w); }
#endif
static inline int ImMin(int lhs, int rhs) { return lhs < rhs ? lhs : rhs; }
static inline int ImMax(int lhs, int rhs) { return lhs >= rhs ? lhs : rhs; }
static inline float ImMin(float lhs, float rhs) { return lhs < rhs ? lhs : rhs; }
static inline float ImMax(float lhs, float rhs) { return lhs >= rhs ? lhs : rhs; }
static inline ImVec2 ImMin(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(ImMin(lhs.x,rhs.x), ImMin(lhs.y,rhs.y)); }
static inline ImVec2 ImMax(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(ImMax(lhs.x,rhs.x), ImMax(lhs.y,rhs.y)); }
static inline int ImClamp(int v, int mn, int mx) { return (v < mn) ? mn : (v > mx) ? mx : v; }
static inline float ImClamp(float v, float mn, float mx) { return (v < mn) ? mn : (v > mx) ? mx : v; }
static inline ImVec2 ImClamp(const ImVec2& f, const ImVec2& mn, ImVec2 mx) { return ImVec2(ImClamp(f.x,mn.x,mx.x), ImClamp(f.y,mn.y,mx.y)); }
static inline float ImSaturate(float f) { return (f < 0.0f) ? 0.0f : (f > 1.0f) ? 1.0f : f; }
static inline float ImLerp(float a, float b, float t) { return a + (b - a) * t; }
static inline ImVec2 ImLerp(const ImVec2& a, const ImVec2& b, const ImVec2& t) { return ImVec2(a.x + (b.x - a.x) * t.x, a.y + (b.y - a.y) * t.y); }
static inline float ImLengthSqr(const ImVec2& lhs) { return lhs.x*lhs.x + lhs.y*lhs.y; }
static inline float ImLengthSqr(const ImVec4& lhs) { return lhs.x*lhs.x + lhs.y*lhs.y + lhs.z*lhs.z + lhs.w*lhs.w; }
static inline float ImInvLength(const ImVec2& lhs, float fail_value) { float d = lhs.x*lhs.x + lhs.y*lhs.y; if (d > 0.0f) return 1.0f / sqrtf(d); return fail_value; }
static inline ImVec2 ImRound(ImVec2 v) { return ImVec2((float)(int)v.x, (float)(int)v.y); }
// We call C++ constructor on own allocated memory via the placement "new(ptr) Type()" syntax.
// Defining a custom placement new() with a dummy parameter allows us to bypass including <new> which on some platforms complains when user has disabled exceptions.
#ifdef IMGUI_DEFINE_PLACEMENT_NEW
struct ImPlacementNewDummy {};
inline void* operator new(size_t, ImPlacementNewDummy, void* ptr) { return ptr; }
inline void operator delete(void*, ImPlacementNewDummy, void*) {}
#define IM_PLACEMENT_NEW(_PTR) new(ImPlacementNewDummy() ,_PTR)
#endif
//-----------------------------------------------------------------------------
// Types
//-----------------------------------------------------------------------------
enum ImGuiButtonFlags_
{
ImGuiButtonFlags_Repeat = 1 << 0,
ImGuiButtonFlags_PressedOnClick = 1 << 1, // return pressed on click only (default requires click+release)
ImGuiButtonFlags_PressedOnRelease = 1 << 2, // return pressed on release only (default requires click+release)
ImGuiButtonFlags_FlattenChilds = 1 << 3,
ImGuiButtonFlags_DontClosePopups = 1 << 4,
ImGuiButtonFlags_Disabled = 1 << 5,
ImGuiButtonFlags_AlignTextBaseLine = 1 << 6,
ImGuiButtonFlags_NoKeyModifiers = 1 << 7
};
enum ImGuiTreeNodeFlags_
{
ImGuiTreeNodeFlags_DefaultOpen = 1 << 0,
ImGuiTreeNodeFlags_NoAutoExpandOnLog = 1 << 1
};
enum ImGuiSliderFlags_
{
ImGuiSliderFlags_Vertical = 1 << 0
};
enum ImGuiSelectableFlagsPrivate_
{
// NB: need to be in sync with last value of ImGuiSelectableFlags_
ImGuiSelectableFlags_Menu = 1 << 2,
ImGuiSelectableFlags_MenuItem = 1 << 3,
ImGuiSelectableFlags_Disabled = 1 << 4,
ImGuiSelectableFlags_DrawFillAvailWidth = 1 << 5
};
// FIXME: this is in development, not exposed/functional as a generic feature yet.
enum ImGuiLayoutType_
{
ImGuiLayoutType_Vertical,
ImGuiLayoutType_Horizontal
};
enum ImGuiPlotType
{
ImGuiPlotType_Lines,
ImGuiPlotType_Histogram
};
enum ImGuiDataType
{
ImGuiDataType_Int,
ImGuiDataType_Float
};
// 2D axis aligned bounding-box
// NB: we can't rely on ImVec2 math operators being available here
struct IMGUI_API ImRect
{
ImVec2 Min; // Upper-left
ImVec2 Max; // Lower-right
ImRect() : Min(FLT_MAX,FLT_MAX), Max(-FLT_MAX,-FLT_MAX) {}
ImRect(const ImVec2& min, const ImVec2& max) : Min(min), Max(max) {}
ImRect(const ImVec4& v) : Min(v.x, v.y), Max(v.z, v.w) {}
ImRect(float x1, float y1, float x2, float y2) : Min(x1, y1), Max(x2, y2) {}
ImVec2 GetCenter() const { return ImVec2((Min.x+Max.x)*0.5f, (Min.y+Max.y)*0.5f); }
ImVec2 GetSize() const { return ImVec2(Max.x-Min.x, Max.y-Min.y); }
float GetWidth() const { return Max.x-Min.x; }
float GetHeight() const { return Max.y-Min.y; }
ImVec2 GetTL() const { return Min; } // Top-left
ImVec2 GetTR() const { return ImVec2(Max.x, Min.y); } // Top-right
ImVec2 GetBL() const { return ImVec2(Min.x, Max.y); } // Bottom-left
ImVec2 GetBR() const { return Max; } // Bottom-right
bool Contains(const ImVec2& p) const { return p.x >= Min.x && p.y >= Min.y && p.x < Max.x && p.y < Max.y; }
bool Contains(const ImRect& r) const { return r.Min.x >= Min.x && r.Min.y >= Min.y && r.Max.x < Max.x && r.Max.y < Max.y; }
bool Overlaps(const ImRect& r) const { return r.Min.y < Max.y && r.Max.y > Min.y && r.Min.x < Max.x && r.Max.x > Min.x; }
void Add(const ImVec2& rhs) { if (Min.x > rhs.x) Min.x = rhs.x; if (Min.y > rhs.y) Min.y = rhs.y; if (Max.x < rhs.x) Max.x = rhs.x; if (Max.y < rhs.y) Max.y = rhs.y; }
void Add(const ImRect& rhs) { if (Min.x > rhs.Min.x) Min.x = rhs.Min.x; if (Min.y > rhs.Min.y) Min.y = rhs.Min.y; if (Max.x < rhs.Max.x) Max.x = rhs.Max.x; if (Max.y < rhs.Max.y) Max.y = rhs.Max.y; }
void Expand(const float amount) { Min.x -= amount; Min.y -= amount; Max.x += amount; Max.y += amount; }
void Expand(const ImVec2& amount) { Min.x -= amount.x; Min.y -= amount.y; Max.x += amount.x; Max.y += amount.y; }
void Reduce(const ImVec2& amount) { Min.x += amount.x; Min.y += amount.y; Max.x -= amount.x; Max.y -= amount.y; }
void Clip(const ImRect& clip) { if (Min.x < clip.Min.x) Min.x = clip.Min.x; if (Min.y < clip.Min.y) Min.y = clip.Min.y; if (Max.x > clip.Max.x) Max.x = clip.Max.x; if (Max.y > clip.Max.y) Max.y = clip.Max.y; }
void Round() { Min.x = (float)(int)Min.x; Min.y = (float)(int)Min.y; Max.x = (float)(int)Max.x; Max.y = (float)(int)Max.y; }
ImVec2 GetClosestPoint(ImVec2 p, bool on_edge) const
{
if (!on_edge && Contains(p))
return p;
if (p.x > Max.x) p.x = Max.x;
else if (p.x < Min.x) p.x = Min.x;
if (p.y > Max.y) p.y = Max.y;
else if (p.y < Min.y) p.y = Min.y;
return p;
}
};
// Stacked color modifier, backup of modified data so we can restore it
struct ImGuiColMod
{
ImGuiCol Col;
ImVec4 PreviousValue;
};
// Stacked style modifier, backup of modified data so we can restore it
struct ImGuiStyleMod
{
ImGuiStyleVar Var;
ImVec2 PreviousValue;
};
// Stacked data for BeginGroup()/EndGroup()
struct ImGuiGroupData
{
ImVec2 BackupCursorPos;
ImVec2 BackupCursorMaxPos;
float BackupIndentX;
float BackupCurrentLineHeight;
float BackupCurrentLineTextBaseOffset;
float BackupLogLinePosY;
bool AdvanceCursor;
};
// Per column data for Columns()
struct ImGuiColumnData
{
float OffsetNorm; // Column start offset, normalized 0.0 (far left) -> 1.0 (far right)
//float IndentX;
};
// Simple column measurement currently used for MenuItem() only. This is very short-sighted for now and NOT a generic helper.
struct IMGUI_API ImGuiSimpleColumns
{
int Count;
float Spacing;
float Width, NextWidth;
float Pos[8], NextWidths[8];
ImGuiSimpleColumns();
void Update(int count, float spacing, bool clear);
float DeclColumns(float w0, float w1, float w2);
float CalcExtraSpace(float avail_w);
};
// Internal state of the currently focused/edited text input box
struct IMGUI_API ImGuiTextEditState
{
ImGuiID Id; // widget id owning the text state
ImVector<ImWchar> Text; // edit buffer, we need to persist but can't guarantee the persistence of the user-provided buffer. so we copy into own buffer.
ImVector<char> InitialText; // backup of end-user buffer at the time of focus (in UTF-8, unaltered)
ImVector<char> TempTextBuffer;
int CurLenA, CurLenW; // we need to maintain our buffer length in both UTF-8 and wchar format.
int BufSizeA; // end-user buffer size
float ScrollX;
ImGuiStb::STB_TexteditState StbState;
float CursorAnim;
bool CursorFollow;
bool SelectedAllMouseLock;
ImGuiTextEditState() { memset(this, 0, sizeof(*this)); }
void CursorAnimReset() { CursorAnim = -0.30f; } // After a user-input the cursor stays on for a while without blinking
void CursorClamp() { StbState.cursor = ImMin(StbState.cursor, CurLenW); StbState.select_start = ImMin(StbState.select_start, CurLenW); StbState.select_end = ImMin(StbState.select_end, CurLenW); }
bool HasSelection() const { return StbState.select_start != StbState.select_end; }
void ClearSelection() { StbState.select_start = StbState.select_end = StbState.cursor; }
void SelectAll() { StbState.select_start = 0; StbState.select_end = CurLenW; StbState.cursor = StbState.select_end; StbState.has_preferred_x = false; }
void OnKeyPressed(int key);
};
// Data saved in imgui.ini file
struct ImGuiIniData
{
char* Name;
ImGuiID ID;
ImVec2 Pos;
ImVec2 Size;
bool Collapsed;
};
// Mouse cursor data (used when io.MouseDrawCursor is set)
struct ImGuiMouseCursorData
{
ImGuiMouseCursor Type;
ImVec2 HotOffset;
ImVec2 Size;
ImVec2 TexUvMin[2];
ImVec2 TexUvMax[2];
};
// Storage for current popup stack
struct ImGuiPopupRef
{
ImGuiID PopupID; // Set on OpenPopup()
ImGuiWindow* Window; // Resolved on BeginPopup() - may stay unresolved if user never calls OpenPopup()
ImGuiWindow* ParentWindow; // Set on OpenPopup()
ImGuiID ParentMenuSet; // Set on OpenPopup()
ImVec2 MousePosOnOpen; // Copy of mouse position at the time of opening popup
ImGuiPopupRef(ImGuiID id, ImGuiWindow* parent_window, ImGuiID parent_menu_set, const ImVec2& mouse_pos) { PopupID = id; Window = NULL; ParentWindow = parent_window; ParentMenuSet = parent_menu_set; MousePosOnOpen = mouse_pos; }
};
// Main state for ImGui
struct ImGuiState
{
bool Initialized;
ImGuiIO IO;
ImGuiStyle Style;
ImFont* Font; // (Shortcut) == FontStack.empty() ? IO.Font : FontStack.back()
float FontSize; // (Shortcut) == FontBaseSize * g.CurrentWindow->FontWindowScale == window->FontSize()
float FontBaseSize; // (Shortcut) == IO.FontGlobalScale * Font->Scale * Font->FontSize. Size of characters.
ImVec2 FontTexUvWhitePixel; // (Shortcut) == Font->TexUvForWhite
float Time;
int FrameCount;
int FrameCountEnded;
int FrameCountRendered;
ImVector<ImGuiWindow*> Windows;
ImVector<ImGuiWindow*> WindowsSortBuffer;
ImGuiWindow* CurrentWindow; // Being drawn into
ImVector<ImGuiWindow*> CurrentWindowStack;
ImGuiWindow* FocusedWindow; // Will catch keyboard inputs
ImGuiWindow* HoveredWindow; // Will catch mouse inputs
ImGuiWindow* HoveredRootWindow; // Will catch mouse inputs (for focus/move only)
ImGuiID HoveredId; // Hovered widget
bool HoveredIdAllowOverlap;
ImGuiID HoveredIdPreviousFrame;
ImGuiID ActiveId; // Active widget
ImGuiID ActiveIdPreviousFrame;
bool ActiveIdIsAlive;
bool ActiveIdIsJustActivated; // Set at the time of activation for one frame
bool ActiveIdAllowOverlap; // Set only by active widget
ImGuiWindow* ActiveIdWindow;
ImGuiWindow* MovedWindow; // Track the child window we clicked on to move a window. Pointer is only valid if ActiveID is the "#MOVE" identifier of a window.
ImVector<ImGuiIniData> Settings; // .ini Settings
float SettingsDirtyTimer; // Save .ini settinngs on disk when time reaches zero
ImVector<ImGuiColMod> ColorModifiers; // Stack for PushStyleColor()/PopStyleColor()
ImVector<ImGuiStyleMod> StyleModifiers; // Stack for PushStyleVar()/PopStyleVar()
ImVector<ImFont*> FontStack; // Stack for PushFont()/PopFont()
ImVector<ImGuiPopupRef> OpenedPopupStack; // Which popups are open (persistent)
ImVector<ImGuiPopupRef> CurrentPopupStack; // Which level of BeginPopup() we are in (reset every frame)
// Storage for SetNexWindow** and SetNextTreeNode*** functions
ImVec2 SetNextWindowPosVal;
ImVec2 SetNextWindowSizeVal;
ImVec2 SetNextWindowContentSizeVal;
bool SetNextWindowCollapsedVal;
ImGuiSetCond SetNextWindowPosCond;
ImGuiSetCond SetNextWindowSizeCond;
ImGuiSetCond SetNextWindowContentSizeCond;
ImGuiSetCond SetNextWindowCollapsedCond;
bool SetNextWindowFocus;
bool SetNextTreeNodeOpenedVal;
ImGuiSetCond SetNextTreeNodeOpenedCond;
// Render
ImDrawData RenderDrawData; // Main ImDrawData instance to pass render information to the user
ImVector<ImDrawList*> RenderDrawLists[3];
float ModalWindowDarkeningRatio;
ImDrawList OverlayDrawList; // Optional software render of mouse cursors, if io.MouseDrawCursor is set + a few debug overlays
ImGuiMouseCursor MouseCursor;
ImGuiMouseCursorData MouseCursorData[ImGuiMouseCursor_Count_];
// Widget state
ImGuiTextEditState InputTextState;
ImFont InputTextPasswordFont;
ImGuiID ScalarAsInputTextId; // Temporary text input when CTRL+clicking on a slider, etc.
ImGuiStorage ColorEditModeStorage; // Store user selection of color edit mode
ImVec2 ActiveClickDeltaToCenter;
float DragCurrentValue; // Currently dragged value, always float, not rounded by end-user precision settings
ImVec2 DragLastMouseDelta;
float DragSpeedDefaultRatio; // If speed == 0.0f, uses (max-min) * DragSpeedDefaultRatio
float DragSpeedScaleSlow;
float DragSpeedScaleFast;
ImVec2 ScrollbarClickDeltaToGrabCenter; // Distance between mouse and center of grab box, normalized in parent space. Use storage?
char Tooltip[1024];
char* PrivateClipboard; // If no custom clipboard handler is defined
ImVec2 OsImePosRequest, OsImePosSet; // Cursor position request & last passed to the OS Input Method Editor
// Logging
bool LogEnabled;
FILE* LogFile; // If != NULL log to stdout/ file
ImGuiTextBuffer* LogClipboard; // Else log to clipboard. This is pointer so our GImGui static constructor doesn't call heap allocators.
int LogStartDepth;
int LogAutoExpandMaxDepth;
// Misc
float FramerateSecPerFrame[120]; // calculate estimate of framerate for user
int FramerateSecPerFrameIdx;
float FramerateSecPerFrameAccum;
bool CaptureMouseNextFrame; // explicit capture via CaptureInputs() sets those flags
bool CaptureKeyboardNextFrame;
char TempBuffer[1024*3+1]; // temporary text buffer
ImGuiState()
{
Initialized = false;
Font = NULL;
FontSize = FontBaseSize = 0.0f;
FontTexUvWhitePixel = ImVec2(0.0f, 0.0f);
Time = 0.0f;
FrameCount = 0;
FrameCountEnded = FrameCountRendered = -1;
CurrentWindow = NULL;
FocusedWindow = NULL;
HoveredWindow = NULL;
HoveredRootWindow = NULL;
HoveredId = 0;
HoveredIdAllowOverlap = false;
HoveredIdPreviousFrame = 0;
ActiveId = 0;
ActiveIdPreviousFrame = 0;
ActiveIdIsAlive = false;
ActiveIdIsJustActivated = false;
ActiveIdAllowOverlap = false;
ActiveIdWindow = NULL;
MovedWindow = NULL;
SettingsDirtyTimer = 0.0f;
SetNextWindowPosVal = ImVec2(0.0f, 0.0f);
SetNextWindowSizeVal = ImVec2(0.0f, 0.0f);
SetNextWindowCollapsedVal = false;
SetNextWindowPosCond = 0;
SetNextWindowSizeCond = 0;
SetNextWindowContentSizeCond = 0;
SetNextWindowCollapsedCond = 0;
SetNextWindowFocus = false;
SetNextTreeNodeOpenedVal = false;
SetNextTreeNodeOpenedCond = 0;
ScalarAsInputTextId = 0;
ActiveClickDeltaToCenter = ImVec2(0.0f, 0.0f);
DragCurrentValue = 0.0f;
DragLastMouseDelta = ImVec2(0.0f, 0.0f);
DragSpeedDefaultRatio = 0.01f;
DragSpeedScaleSlow = 0.01f;
DragSpeedScaleFast = 10.0f;
ScrollbarClickDeltaToGrabCenter = ImVec2(0.0f, 0.0f);
memset(Tooltip, 0, sizeof(Tooltip));
PrivateClipboard = NULL;
OsImePosRequest = OsImePosSet = ImVec2(-1.0f, -1.0f);
ModalWindowDarkeningRatio = 0.0f;
OverlayDrawList._OwnerName = "##Overlay"; // Give it a name for debugging
MouseCursor = ImGuiMouseCursor_Arrow;
memset(MouseCursorData, 0, sizeof(MouseCursorData));
LogEnabled = false;
LogFile = NULL;
LogClipboard = NULL;
LogStartDepth = 0;
LogAutoExpandMaxDepth = 2;
memset(FramerateSecPerFrame, 0, sizeof(FramerateSecPerFrame));
FramerateSecPerFrameIdx = 0;
FramerateSecPerFrameAccum = 0.0f;
CaptureMouseNextFrame = CaptureKeyboardNextFrame = false;
memset(TempBuffer, 0, sizeof(TempBuffer));
}
};
// Transient per-window data, reset at the beginning of the frame
// FIXME: That's theory, in practice the delimitation between ImGuiWindow and ImGuiDrawContext is quite tenuous and could be reconsidered.
struct IMGUI_API ImGuiDrawContext
{
ImVec2 CursorPos;
ImVec2 CursorPosPrevLine;
ImVec2 CursorStartPos;
ImVec2 CursorMaxPos; // Implicitly calculate the size of our contents, always extending. Saved into window->SizeContents at the end of the frame
float CurrentLineHeight;
float CurrentLineTextBaseOffset;
float PrevLineHeight;
float PrevLineTextBaseOffset;
float LogLinePosY;
int TreeDepth;
ImGuiID LastItemID;
ImRect LastItemRect;
bool LastItemHoveredAndUsable; // Item rectangle is hovered, and its window is currently interactable with (not blocked by a popup preventing access to the window)
bool LastItemHoveredRect; // Item rectangle is hovered, but its window may or not be currently interactable with (might be blocked by a popup preventing access to the window)
bool MenuBarAppending;
float MenuBarOffsetX;
ImVector<ImGuiWindow*> ChildWindows;
ImGuiStorage* StateStorage;
ImGuiLayoutType LayoutType;
// We store the current settings outside of the vectors to increase memory locality (reduce cache misses). The vectors are rarely modified. Also it allows us to not heap allocate for short-lived windows which are not using those settings.
float ItemWidth; // == ItemWidthStack.back(). 0.0: default, >0.0: width in pixels, <0.0: align xx pixels to the right of window
float TextWrapPos; // == TextWrapPosStack.back() [empty == -1.0f]
bool AllowKeyboardFocus; // == AllowKeyboardFocusStack.back() [empty == true]
bool ButtonRepeat; // == ButtonRepeatStack.back() [empty == false]
ImVector<float> ItemWidthStack;
ImVector<float> TextWrapPosStack;
ImVector<bool> AllowKeyboardFocusStack;
ImVector<bool> ButtonRepeatStack;
ImVector<ImGuiGroupData>GroupStack;
ImGuiColorEditMode ColorEditMode;
int StackSizesBackup[6]; // Store size of various stacks for asserting
float IndentX; // Indentation / start position from left of window (increased by TreePush/TreePop, etc.)
float ColumnsOffsetX; // Offset to the current column (if ColumnsCurrent > 0). FIXME: This and the above should be a stack to allow use cases like Tree->Column->Tree. Need revamp columns API.
int ColumnsCurrent;
int ColumnsCount;
float ColumnsMinX;
float ColumnsMaxX;
float ColumnsStartPosY;
float ColumnsCellMinY;
float ColumnsCellMaxY;
bool ColumnsShowBorders;
ImGuiID ColumnsSetID;
ImVector<ImGuiColumnData> ColumnsData;
ImGuiDrawContext()
{
CursorPos = CursorPosPrevLine = CursorStartPos = CursorMaxPos = ImVec2(0.0f, 0.0f);
CurrentLineHeight = PrevLineHeight = 0.0f;
CurrentLineTextBaseOffset = PrevLineTextBaseOffset = 0.0f;
LogLinePosY = -1.0f;
TreeDepth = 0;
LastItemID = 0;
LastItemRect = ImRect(0.0f,0.0f,0.0f,0.0f);
LastItemHoveredAndUsable = LastItemHoveredRect = false;
MenuBarAppending = false;
MenuBarOffsetX = 0.0f;
StateStorage = NULL;
LayoutType = ImGuiLayoutType_Vertical;
ItemWidth = 0.0f;
ButtonRepeat = false;
AllowKeyboardFocus = true;
TextWrapPos = -1.0f;
ColorEditMode = ImGuiColorEditMode_RGB;
memset(StackSizesBackup, 0, sizeof(StackSizesBackup));
IndentX = 0.0f;
ColumnsOffsetX = 0.0f;
ColumnsCurrent = 0;
ColumnsCount = 1;
ColumnsMinX = ColumnsMaxX = 0.0f;
ColumnsStartPosY = 0.0f;
ColumnsCellMinY = ColumnsCellMaxY = 0.0f;
ColumnsShowBorders = true;
ColumnsSetID = 0;
}
};
// Windows data
struct IMGUI_API ImGuiWindow
{
char* Name;
ImGuiID ID;
ImGuiWindowFlags Flags;
ImVec2 PosFloat;
ImVec2 Pos; // Position rounded-up to nearest pixel
ImVec2 Size; // Current size (==SizeFull or collapsed title bar size)
ImVec2 SizeFull; // Size when non collapsed
ImVec2 SizeContents; // Size of contents (== extents reach of the drawing cursor) from previous frame
ImVec2 SizeContentsExplicit; // Size of contents explicitly set by the user via SetNextWindowContentSize()
ImVec2 WindowPadding; // Window padding at the time of begin. We need to lock it, in particular manipulation of the ShowBorder would have an effect
ImGuiID MoveID; // == window->GetID("#MOVE")
ImVec2 Scroll;
ImVec2 ScrollTarget; // target scroll position. stored as cursor position with scrolling canceled out, so the highest point is always 0.0f. (FLT_MAX for no change)
ImVec2 ScrollTargetCenterRatio; // 0.0f = scroll so that target position is at top, 0.5f = scroll so that target position is centered
bool ScrollbarX, ScrollbarY;
ImVec2 ScrollbarSizes;
float BorderSize;
bool Active; // Set to true on Begin()
bool WasActive;
bool Accessed; // Set to true when any widget access the current window
bool Collapsed; // Set when collapsing window to become only title-bar
bool SkipItems; // == Visible && !Collapsed
int BeginCount; // Number of Begin() during the current frame (generally 0 or 1, 1+ if appending via multiple Begin/End pairs)
ImGuiID PopupID; // ID in the popup stack when this window is used as a popup/menu (because we use generic Name/ID for recycling)
int AutoFitFramesX, AutoFitFramesY;
bool AutoFitOnlyGrows;
int AutoPosLastDirection;
int HiddenFrames;
int SetWindowPosAllowFlags; // bit ImGuiSetCond_*** specify if SetWindowPos() call will succeed with this particular flag.
int SetWindowSizeAllowFlags; // bit ImGuiSetCond_*** specify if SetWindowSize() call will succeed with this particular flag.
int SetWindowCollapsedAllowFlags; // bit ImGuiSetCond_*** specify if SetWindowCollapsed() call will succeed with this particular flag.
bool SetWindowPosCenterWanted;
ImGuiDrawContext DC; // Temporary per-window data, reset at the beginning of the frame
ImVector<ImGuiID> IDStack; // ID stack. ID are hashes seeded with the value at the top of the stack
ImRect ClipRect; // = DrawList->clip_rect_stack.back(). Scissoring / clipping rectangle. x1, y1, x2, y2.
ImRect ClippedWindowRect; // = ClipRect just after setup in Begin()
int LastFrameActive;
float ItemWidthDefault;
ImGuiSimpleColumns MenuColumns; // Simplified columns storage for menu items
ImGuiStorage StateStorage;
float FontWindowScale; // Scale multiplier per-window
ImDrawList* DrawList;
ImGuiWindow* RootWindow;
ImGuiWindow* RootNonPopupWindow;
// Focus
int FocusIdxAllCounter; // Start at -1 and increase as assigned via FocusItemRegister()
int FocusIdxTabCounter; // (same, but only count widgets which you can Tab through)
int FocusIdxAllRequestCurrent; // Item being requested for focus
int FocusIdxTabRequestCurrent; // Tab-able item being requested for focus
int FocusIdxAllRequestNext; // Item being requested for focus, for next update (relies on layout to be stable between the frame pressing TAB and the next frame)
int FocusIdxTabRequestNext; // "
public:
ImGuiWindow(const char* name);
~ImGuiWindow();
ImGuiID GetID(const char* str, const char* str_end = NULL);
ImGuiID GetID(const void* ptr);
ImRect Rect() const { return ImRect(Pos.x, Pos.y, Pos.x+Size.x, Pos.y+Size.y); }
float CalcFontSize() const { return GImGui->FontBaseSize * FontWindowScale; }
float TitleBarHeight() const { return (Flags & ImGuiWindowFlags_NoTitleBar) ? 0.0f : CalcFontSize() + GImGui->Style.FramePadding.y * 2.0f; }
ImRect TitleBarRect() const { return ImRect(Pos, ImVec2(Pos.x + SizeFull.x, Pos.y + TitleBarHeight())); }
float MenuBarHeight() const { return (Flags & ImGuiWindowFlags_MenuBar) ? CalcFontSize() + GImGui->Style.FramePadding.y * 2.0f : 0.0f; }
ImRect MenuBarRect() const { float y1 = Pos.y + TitleBarHeight(); return ImRect(Pos.x, y1, Pos.x + SizeFull.x, y1 + MenuBarHeight()); }
};
//-----------------------------------------------------------------------------
// Internal API
// No guarantee of forward compatibility here.
//-----------------------------------------------------------------------------
namespace ImGui
{
// We should always have a CurrentWindow in the stack (there is an implicit "Debug" window)
// If this ever crash because g.CurrentWindow is NULL it means that either
// - ImGui::NewFrame() has never been called, which is illegal.
// - You are calling ImGui functions after ImGui::Render() and before the next ImGui::NewFrame(), which is also illegal.
inline ImGuiWindow* GetCurrentWindowRead() { ImGuiState& g = *GImGui; return g.CurrentWindow; }
inline ImGuiWindow* GetCurrentWindow() { ImGuiState& g = *GImGui; g.CurrentWindow->Accessed = true; return g.CurrentWindow; }
IMGUI_API ImGuiWindow* GetParentWindow();
IMGUI_API void FocusWindow(ImGuiWindow* window);
IMGUI_API void SetActiveID(ImGuiID id, ImGuiWindow* window);
IMGUI_API void SetHoveredID(ImGuiID id);
IMGUI_API void KeepAliveID(ImGuiID id);
IMGUI_API void EndFrame(); // Automatically called by Render()
IMGUI_API void ItemSize(const ImVec2& size, float text_offset_y = 0.0f);
IMGUI_API void ItemSize(const ImRect& bb, float text_offset_y = 0.0f);
IMGUI_API bool ItemAdd(const ImRect& bb, const ImGuiID* id);
IMGUI_API bool IsClippedEx(const ImRect& bb, const ImGuiID* id, bool clip_even_when_logged);
IMGUI_API bool IsHovered(const ImRect& bb, ImGuiID id, bool flatten_childs = false);
IMGUI_API bool FocusableItemRegister(ImGuiWindow* window, bool is_active, bool tab_stop = true); // Return true if focus is requested
IMGUI_API void FocusableItemUnregister(ImGuiWindow* window);
IMGUI_API ImVec2 CalcItemSize(ImVec2 size, float default_x, float default_y);
IMGUI_API float CalcWrapWidthForPos(const ImVec2& pos, float wrap_pos_x);
IMGUI_API void OpenPopupEx(const char* str_id, bool reopen_existing);
inline IMGUI_API ImU32 GetColorU32(ImGuiCol idx, float alpha_mul) { ImVec4 c = GImGui->Style.Colors[idx]; c.w *= GImGui->Style.Alpha * alpha_mul; return ImGui::ColorConvertFloat4ToU32(c); }
inline IMGUI_API ImU32 GetColorU32(const ImVec4& col) { ImVec4 c = col; c.w *= GImGui->Style.Alpha; return ImGui::ColorConvertFloat4ToU32(c); }
// NB: All position are in absolute pixels coordinates (not window coordinates)
// FIXME: Refactor all RenderText* functions into one.
IMGUI_API void RenderText(ImVec2 pos, const char* text, const char* text_end = NULL, bool hide_text_after_hash = true);
IMGUI_API void RenderTextWrapped(ImVec2 pos, const char* text, const char* text_end, float wrap_width);
IMGUI_API void RenderTextClipped(const ImVec2& pos_min, const ImVec2& pos_max, const char* text, const char* text_end, const ImVec2* text_size_if_known, ImGuiAlign align = ImGuiAlign_Default, const ImVec2* clip_min = NULL, const ImVec2* clip_max = NULL);
IMGUI_API void RenderFrame(ImVec2 p_min, ImVec2 p_max, ImU32 fill_col, bool border = true, float rounding = 0.0f);
IMGUI_API void RenderCollapseTriangle(ImVec2 p_min, bool opened, float scale = 1.0f, bool shadow = false);
IMGUI_API void RenderCheckMark(ImVec2 pos, ImU32 col);
IMGUI_API void PushClipRect(const ImVec2& clip_rect_min, const ImVec2& clip_rect_max, bool intersect_with_existing_clip_rect = true);
IMGUI_API void PopClipRect();
IMGUI_API bool ButtonBehavior(const ImRect& bb, ImGuiID id, bool* out_hovered, bool* out_held, ImGuiButtonFlags flags = 0);
IMGUI_API bool ButtonEx(const char* label, const ImVec2& size_arg = ImVec2(0,0), ImGuiButtonFlags flags = 0);
IMGUI_API bool SliderBehavior(const ImRect& frame_bb, ImGuiID id, float* v, float v_min, float v_max, float power, int decimal_precision, ImGuiSliderFlags flags = 0);
IMGUI_API bool SliderFloatN(const char* label, float* v, int components, float v_min, float v_max, const char* display_format, float power);
IMGUI_API bool SliderIntN(const char* label, int* v, int components, int v_min, int v_max, const char* display_format);
IMGUI_API bool DragBehavior(const ImRect& frame_bb, ImGuiID id, float* v, float v_speed, float v_min, float v_max, int decimal_precision, float power);
IMGUI_API bool DragFloatN(const char* label, float* v, int components, float v_speed, float v_min, float v_max, const char* display_format, float power);
IMGUI_API bool DragIntN(const char* label, int* v, int components, float v_speed, int v_min, int v_max, const char* display_format);
IMGUI_API bool InputTextEx(const char* label, char* buf, int buf_size, const ImVec2& size_arg, ImGuiInputTextFlags flags, ImGuiTextEditCallback callback = NULL, void* user_data = NULL);
IMGUI_API bool InputFloatN(const char* label, float* v, int components, int decimal_precision, ImGuiInputTextFlags extra_flags);
IMGUI_API bool InputIntN(const char* label, int* v, int components, ImGuiInputTextFlags extra_flags);
IMGUI_API bool InputScalarEx(const char* label, ImGuiDataType data_type, void* data_ptr, void* step_ptr, void* step_fast_ptr, const char* scalar_format, ImGuiInputTextFlags extra_flags);
IMGUI_API bool InputScalarAsWidgetReplacement(const ImRect& aabb, const char* label, ImGuiDataType data_type, void* data_ptr, ImGuiID id, int decimal_precision);
IMGUI_API bool TreeNodeBehaviorIsOpened(ImGuiID id, ImGuiTreeNodeFlags flags = 0); // Consume previous SetNextTreeNodeOpened() data, if any. May return true when logging
IMGUI_API void PlotEx(ImGuiPlotType plot_type, const char* label, float (*values_getter)(void* data, int idx), void* data, int values_count, int values_offset, const char* overlay_text, float scale_min, float scale_max, ImVec2 graph_size);
IMGUI_API int ParseFormatPrecision(const char* fmt, int default_value);
IMGUI_API float RoundScalar(float value, int decimal_precision);
} // namespace ImGuiP
#ifdef _MSC_VER
#pragma warning (pop)
#endif