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imgui/imgui_widgets.cpp

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// dear imgui, v1.64 WIP
// (widgets code)
#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)
#define _CRT_SECURE_NO_WARNINGS
#endif
#include "imgui.h"
#ifndef IMGUI_DEFINE_MATH_OPERATORS
#define IMGUI_DEFINE_MATH_OPERATORS
#endif
#include "imgui_internal.h"
#include <ctype.h> // toupper, isprint
// Visual Studio warnings
#ifdef _MSC_VER
#pragma warning (disable: 4127) // condition expression is constant
#pragma warning (disable: 4996) // 'This function or variable may be unsafe': strcpy, strdup, sprintf, vsnprintf, sscanf, fopen
#endif
// Clang/GCC warnings with -Weverything
#ifdef __clang__
#pragma clang diagnostic ignored "-Wformat-nonliteral" // warning : format string is not a string literal // passing non-literal to vsnformat(). yes, user passing incorrect format strings can crash the code.
#pragma clang diagnostic ignored "-Wsign-conversion" // warning : implicit conversion changes signedness //
#elif defined(__GNUC__)
#pragma GCC diagnostic ignored "-Wformat-nonliteral" // warning: format not a string literal, format string not checked
#if __GNUC__ >= 8
#pragma GCC diagnostic ignored "-Wclass-memaccess" // warning: 'memset/memcpy' clearing/writing an object of type 'xxxx' with no trivial copy-assignment; use assignment or value-initialization instead
#endif
#endif
//-------------------------------------------------------------------------
// Forward Declarations
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
// SHARED UTILITIES
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
// WIDGETS: Text
// - TextUnformatted()
// - Text()
// - TextV()
// - TextColored()
// - TextColoredV()
// - TextDisabled()
// - TextDisabledV()
// - TextWrapped()
// - TextWrappedV()
// - LabelText()
// - LabelTextV()
// - BulletText()
// - BulletTextV()
//-------------------------------------------------------------------------
void ImGui::TextUnformatted(const char* text, const char* text_end)
{
ImGuiWindow* window = GetCurrentWindow();
if (window->SkipItems)
return;
ImGuiContext& g = *GImGui;
IM_ASSERT(text != NULL);
const char* text_begin = text;
if (text_end == NULL)
text_end = text + strlen(text); // FIXME-OPT
const ImVec2 text_pos(window->DC.CursorPos.x, window->DC.CursorPos.y + window->DC.CurrentLineTextBaseOffset);
const float wrap_pos_x = window->DC.TextWrapPos;
const bool wrap_enabled = wrap_pos_x >= 0.0f;
if (text_end - text > 2000 && !wrap_enabled)
{
// Long text!
// Perform manual coarse clipping to optimize for long multi-line text
// From this point we will only compute the width of lines that are visible. Optimization only available when word-wrapping is disabled.
// We also don't vertically center the text within the line full height, which is unlikely to matter because we are likely the biggest and only item on the line.
const char* line = text;
const float line_height = GetTextLineHeight();
const ImRect clip_rect = window->ClipRect;
ImVec2 text_size(0,0);
if (text_pos.y <= clip_rect.Max.y)
{
ImVec2 pos = text_pos;
// Lines to skip (can't skip when logging text)
if (!g.LogEnabled)
{
int lines_skippable = (int)((clip_rect.Min.y - text_pos.y) / line_height);
if (lines_skippable > 0)
{
int lines_skipped = 0;
while (line < text_end && lines_skipped < lines_skippable)
{
const char* line_end = strchr(line, '\n');
if (!line_end)
line_end = text_end;
line = line_end + 1;
lines_skipped++;
}
pos.y += lines_skipped * line_height;
}
}
// Lines to render
if (line < text_end)
{
ImRect line_rect(pos, pos + ImVec2(FLT_MAX, line_height));
while (line < text_end)
{
const char* line_end = strchr(line, '\n');
if (IsClippedEx(line_rect, 0, false))
break;
const ImVec2 line_size = CalcTextSize(line, line_end, false);
text_size.x = ImMax(text_size.x, line_size.x);
RenderText(pos, line, line_end, false);
if (!line_end)
line_end = text_end;
line = line_end + 1;
line_rect.Min.y += line_height;
line_rect.Max.y += line_height;
pos.y += line_height;
}
// Count remaining lines
int lines_skipped = 0;
while (line < text_end)
{
const char* line_end = strchr(line, '\n');
if (!line_end)
line_end = text_end;
line = line_end + 1;
lines_skipped++;
}
pos.y += lines_skipped * line_height;
}
text_size.y += (pos - text_pos).y;
}
ImRect bb(text_pos, text_pos + text_size);
ItemSize(bb);
ItemAdd(bb, 0);
}
else
{
const float wrap_width = wrap_enabled ? CalcWrapWidthForPos(window->DC.CursorPos, wrap_pos_x) : 0.0f;
const ImVec2 text_size = CalcTextSize(text_begin, text_end, false, wrap_width);
// Account of baseline offset
ImRect bb(text_pos, text_pos + text_size);
ItemSize(text_size);
if (!ItemAdd(bb, 0))
return;
// Render (we don't hide text after ## in this end-user function)
RenderTextWrapped(bb.Min, text_begin, text_end, wrap_width);
}
}
void ImGui::Text(const char* fmt, ...)
{
va_list args;
va_start(args, fmt);
TextV(fmt, args);
va_end(args);
}
void ImGui::TextV(const char* fmt, va_list args)
{
ImGuiWindow* window = GetCurrentWindow();
if (window->SkipItems)
return;
ImGuiContext& g = *GImGui;
const char* text_end = g.TempBuffer + ImFormatStringV(g.TempBuffer, IM_ARRAYSIZE(g.TempBuffer), fmt, args);
TextUnformatted(g.TempBuffer, text_end);
}
void ImGui::TextColored(const ImVec4& col, const char* fmt, ...)
{
va_list args;
va_start(args, fmt);
TextColoredV(col, fmt, args);
va_end(args);
}
void ImGui::TextColoredV(const ImVec4& col, const char* fmt, va_list args)
{
PushStyleColor(ImGuiCol_Text, col);
TextV(fmt, args);
PopStyleColor();
}
void ImGui::TextDisabled(const char* fmt, ...)
{
va_list args;
va_start(args, fmt);
TextDisabledV(fmt, args);
va_end(args);
}
void ImGui::TextDisabledV(const char* fmt, va_list args)
{
PushStyleColor(ImGuiCol_Text, GImGui->Style.Colors[ImGuiCol_TextDisabled]);
TextV(fmt, args);
PopStyleColor();
}
void ImGui::TextWrapped(const char* fmt, ...)
{
va_list args;
va_start(args, fmt);
TextWrappedV(fmt, args);
va_end(args);
}
void ImGui::TextWrappedV(const char* fmt, va_list args)
{
bool need_wrap = (GImGui->CurrentWindow->DC.TextWrapPos < 0.0f); // Keep existing wrap position is one ia already set
if (need_wrap) PushTextWrapPos(0.0f);
TextV(fmt, args);
if (need_wrap) PopTextWrapPos();
}
void ImGui::LabelText(const char* label, const char* fmt, ...)
{
va_list args;
va_start(args, fmt);
LabelTextV(label, fmt, args);
va_end(args);
}
// Add a label+text combo aligned to other label+value widgets
void ImGui::LabelTextV(const char* label, const char* fmt, va_list args)
{
ImGuiWindow* window = GetCurrentWindow();
if (window->SkipItems)
return;
ImGuiContext& g = *GImGui;
const ImGuiStyle& style = g.Style;
const float w = CalcItemWidth();
const ImVec2 label_size = CalcTextSize(label, NULL, true);
const ImRect value_bb(window->DC.CursorPos, window->DC.CursorPos + ImVec2(w, label_size.y + style.FramePadding.y*2));
const ImRect total_bb(window->DC.CursorPos, window->DC.CursorPos + ImVec2(w + (label_size.x > 0.0f ? style.ItemInnerSpacing.x : 0.0f), style.FramePadding.y*2) + label_size);
ItemSize(total_bb, style.FramePadding.y);
if (!ItemAdd(total_bb, 0))
return;
// Render
const char* value_text_begin = &g.TempBuffer[0];
const char* value_text_end = value_text_begin + ImFormatStringV(g.TempBuffer, IM_ARRAYSIZE(g.TempBuffer), fmt, args);
RenderTextClipped(value_bb.Min, value_bb.Max, value_text_begin, value_text_end, NULL, ImVec2(0.0f,0.5f));
if (label_size.x > 0.0f)
RenderText(ImVec2(value_bb.Max.x + style.ItemInnerSpacing.x, value_bb.Min.y + style.FramePadding.y), label);
}
void ImGui::BulletText(const char* fmt, ...)
{
va_list args;
va_start(args, fmt);
BulletTextV(fmt, args);
va_end(args);
}
// Text with a little bullet aligned to the typical tree node.
void ImGui::BulletTextV(const char* fmt, va_list args)
{
ImGuiWindow* window = GetCurrentWindow();
if (window->SkipItems)
return;
ImGuiContext& g = *GImGui;
const ImGuiStyle& style = g.Style;
const char* text_begin = g.TempBuffer;
const char* text_end = text_begin + ImFormatStringV(g.TempBuffer, IM_ARRAYSIZE(g.TempBuffer), fmt, args);
const ImVec2 label_size = CalcTextSize(text_begin, text_end, false);
const float text_base_offset_y = ImMax(0.0f, window->DC.CurrentLineTextBaseOffset); // Latch before ItemSize changes it
const float line_height = ImMax(ImMin(window->DC.CurrentLineSize.y, g.FontSize + g.Style.FramePadding.y*2), g.FontSize);
const ImRect bb(window->DC.CursorPos, window->DC.CursorPos + ImVec2(g.FontSize + (label_size.x > 0.0f ? (label_size.x + style.FramePadding.x*2) : 0.0f), ImMax(line_height, label_size.y))); // Empty text doesn't add padding
ItemSize(bb);
if (!ItemAdd(bb, 0))
return;
// Render
RenderBullet(bb.Min + ImVec2(style.FramePadding.x + g.FontSize*0.5f, line_height*0.5f));
RenderText(bb.Min+ImVec2(g.FontSize + style.FramePadding.x*2, text_base_offset_y), text_begin, text_end, false);
}
//-------------------------------------------------------------------------
// WIDGETS: Main
// - ButtonBehavior() [Internal]
// - Button()
// - SmallButton()
// - InvisibleButton()
// - ArrowButton()
// - CloseButton() [Internal]
// - CollapseButton() [Internal]
// - Image()
// - ImageButton()
// - Checkbox()
// - CheckboxFlags()
// - RadioButton()
// - ProgressBar()
// - Bullet()
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
// WIDGETS: Combo Box
// - BeginCombo()
// - EndCombo()
// - Combo()
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
// WIDGETS: Data Type and Data Formatting Helpers [Internal]
// - PatchFormatStringFloatToInt()
// - DataTypeFormatString()
// - DataTypeApplyOp()
// - DataTypeApplyOpFromText()
// - GetMinimumStepAtDecimalPrecision
// - RoundScalarWithFormat<>()
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
// WIDGETS: Drags
// - DragBehaviorT<>() [Internal]
// - DragBehavior() [Internal]
// - DragScalar()
// - DragScalarN()
// - DragFloat()
// - DragFloat2()
// - DragFloat3()
// - DragFloat4()
// - DragFloatRange2()
// - DragInt()
// - DragInt2()
// - DragInt3()
// - DragInt4()
// - DragIntRange2()
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
// WIDGETS: Sliders
// - SliderBehaviorT<>() [Internal]
// - SliderBehavior() [Internal]
// - SliderScalar()
// - SliderScalarN()
// - SliderFloat()
// - SliderFloat2()
// - SliderFloat3()
// - SliderFloat4()
// - SliderAngle()
// - SliderInt()
// - SliderInt2()
// - SliderInt3()
// - SliderInt4()
// - VSliderScalar()
// - VSliderFloat()
// - VSliderInt()
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
// WIDGETS: Inputs (_excepted InputText_)
// - ImParseFormatFindStart()
// - ImParseFormatFindEnd()
// - ImParseFormatTrimDecorations()
// - ImParseFormatPrecision()
// - InputScalarAsWidgetReplacement() [Internal]
// - InputScalar()
// - InputScalarN()
// - InputFloat()
// - InputFloat2()
// - InputFloat3()
// - InputFloat4()
// - InputInt()
// - InputInt2()
// - InputInt3()
// - InputInt4()
// - InputDouble()
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
// WIDGETS: InputText
// - InputText()
// - InputTextMultiline()
// - InputTextEx() [Internal]
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
// WIDGETS: Color Editor / Picker
// - ColorEdit3()
// - ColorEdit4()
// - ColorPicker3()
// - RenderColorRectWithAlphaCheckerboard() [Internal]
// - ColorPicker4()
// - ColorButton()
// - SetColorEditOptions()
// - ColorTooltip() [Internal]
// - ColorEditOptionsPopup() [Internal]
// - ColorPickerOptionsPopup() [Internal]
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
// WIDGETS: Trees
// - TreeNode()
// - TreeNodeV()
// - TreeNodeEx()
// - TreeNodeExV()
// - TreeNodeBehavior() [Internal]
// - TreePush()
// - TreePop()
// - TreeAdvanceToLabelPos()
// - GetTreeNodeToLabelSpacing()
// - SetNextTreeNodeOpen()
// - CollapsingHeader()
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
// WIDGETS: Selectables
// - Selectable()
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
// WIDGETS: List Box
// - ListBox()
// - ListBoxHeader()
// - ListBoxFooter()
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
// WIDGETS: Data Plotting
// - PlotEx() [Internal]
// - PlotLines()
// - PlotHistogram()
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
// WIDGETS: Value() helpers
// - Value()
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
// WIDGETS: Menus
// - BeginMainMenuBar()
// - EndMainMenuBar()
// - BeginMenuBar()
// - EndMenuBar()
// - BeginMenu()
// - EndMenu()
// - MenuItem()
//-------------------------------------------------------------------------
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