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New version of IMGUI_ONCE_UPON_A_FRAME helper macro

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ocornut
2014-11-28 23:08:45 +00:00
parent df2ad5e899
commit 311a2f8328
2 changed files with 30 additions and 22 deletions
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36
imgui.h
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@ -122,7 +122,7 @@ public:
#endif // #ifndef ImVector
// Helpers at bottom of the file:
// - struct ImGuiOnceUponAFrame // Execute a block of code once per frame only (convenient for creating UI within deep-nested code that runs multiple times)
// - IMGUI_ONCE_UPON_A_FRAME // Execute a block of code once per frame only (convenient for creating UI within deep-nested code that runs multiple times)
// - struct ImGuiTextFilter // Parse and apply text filters. In format "aaaaa[,bbbb][,ccccc]"
// - struct ImGuiTextBuffer // Text buffer for logging/accumulating text
// - struct ImGuiStorage // Custom key value storage (if you need to alter open/close states manually)
@ -529,9 +529,13 @@ struct ImGuiIO
// Helper: execute a block of code once a frame only
// Convenient if you want to quickly create an UI within deep-nested code that runs multiple times every frame.
// Usage:
// static ImGuiOnceUponAFrame once;
// if (once) { ... }
// Usage:
// IMGUI_ONCE_UPON_A_FRAME
// {
// // code block will be executed one per frame
// }
// Attention! the macro expand into 2 statement so make sure you don't use it within e.g. an if() statement without curly braces.
#define IMGUI_ONCE_UPON_A_FRAME static ImGuiOnceUponAFrame imgui_oaf##__LINE__; if (imgui_oaf##__LINE__)
struct ImGuiOnceUponAFrame
{
ImGuiOnceUponAFrame() { RefFrame = -1; }
@ -750,22 +754,22 @@ struct ImFont
ImVector<int> IndexLookup; // (built)
IMGUI_API ImFont();
IMGUI_API ~ImFont() { Clear(); }
IMGUI_API ~ImFont() { Clear(); }
IMGUI_API bool LoadFromMemory(const void* data, size_t data_size);
IMGUI_API bool LoadFromFile(const char* filename);
IMGUI_API void Clear();
IMGUI_API void BuildLookupTable();
IMGUI_API const FntGlyph * FindGlyph(unsigned short c, const FntGlyph* fallback = NULL) const;
IMGUI_API float GetFontSize() const { return (float)Info->FontSize; }
IMGUI_API bool IsLoaded() const { return Info != NULL && Common != NULL && Glyphs != NULL; }
IMGUI_API bool LoadFromMemory(const void* data, size_t data_size);
IMGUI_API bool LoadFromFile(const char* filename);
IMGUI_API void Clear();
IMGUI_API void BuildLookupTable();
IMGUI_API const FntGlyph* FindGlyph(unsigned short c, const FntGlyph* fallback = NULL) const;
IMGUI_API float GetFontSize() const { return (float)Info->FontSize; }
IMGUI_API bool IsLoaded() const { return Info != NULL && Common != NULL && Glyphs != NULL; }
// 'max_width' stops rendering after a certain width (could be turned into a 2d size). FLT_MAX to disable.
// 'wrap_width' enable automatic word-wrapping across multiple lines to fit into given width. 0.0f to disable.
IMGUI_API ImVec2 CalcTextSizeA(float size, float max_width, float wrap_width, const char* text_begin, const char* text_end = NULL, const char** remaining = NULL) const; // utf8
IMGUI_API ImVec2 CalcTextSizeW(float size, float max_width, const ImWchar* text_begin, const ImWchar* text_end, const ImWchar** remaining = NULL) const; // wchar
IMGUI_API void RenderText(float size, ImVec2 pos, ImU32 col, const ImVec4& clip_rect, const char* text_begin, const char* text_end, ImDrawVert*& out_vertices, float wrap_width = 0.0f) const;
IMGUI_API ImVec2 CalcTextSizeA(float size, float max_width, float wrap_width, const char* text_begin, const char* text_end = NULL, const char** remaining = NULL) const; // utf8
IMGUI_API ImVec2 CalcTextSizeW(float size, float max_width, const ImWchar* text_begin, const ImWchar* text_end, const ImWchar** remaining = NULL) const; // wchar
IMGUI_API void RenderText(float size, ImVec2 pos, ImU32 col, const ImVec4& clip_rect, const char* text_begin, const char* text_end, ImDrawVert*& out_vertices, float wrap_width = 0.0f) const;
private:
IMGUI_API const char* CalcWordWrapPositionA(float scale, const char* text, const char* text_end, float wrap_width, const FntGlyph* fallback_glyph) const;
IMGUI_API const char* CalcWordWrapPositionA(float scale, const char* text, const char* text_end, float wrap_width, const FntGlyph* fallback_glyph) const;
};