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Diffstat (limited to '3rdparty/imgui-node-editor/imgui_canvas.h')
| -rw-r--r-- | 3rdparty/imgui-node-editor/imgui_canvas.h | 268 |
1 files changed, 0 insertions, 268 deletions
diff --git a/3rdparty/imgui-node-editor/imgui_canvas.h b/3rdparty/imgui-node-editor/imgui_canvas.h deleted file mode 100644 index e5e4959..0000000 --- a/3rdparty/imgui-node-editor/imgui_canvas.h +++ /dev/null @@ -1,268 +0,0 @@ -// Canvas widget - view over infinite virtual space. -// -// Canvas allows you to draw your widgets anywhere over infinite space and provide -// view over it with support for panning and scaling. -// -// When you enter a canvas ImGui is moved to virtual space which mean: -// - ImGui::GetCursorScreenPos() return (0, 0) and which correspond to top left corner -// of the canvas on the screen (this can be changed using CanvasView()). -// - Mouse input is brought to canvas space, so widgets works as usual. -// - Everything you draw with ImDrawList will be in virtual space. -// -// By default origin point is on top left corner of canvas widget. It can be -// changed with call to CanvasView() where you can specify what part of space -// should be viewed by setting viewport origin point and scale. Current state -// can be queried with CanvasViewOrigin() and CanvasViewScale(). -// -// Viewport size is controlled by 'size' parameter in BeginCanvas(). You can query -// it using CanvasContentMin/Max/Size functions. They are useful if you to not specify -// canvas size in which case all free space is used. -// -// Bounds of visible region of infinite space can be queried using CanvasViewMin/Max/Size -// functions. Everything that is drawn outside of this region will be clipped -// as usual in ImGui. -// -// While drawing inside canvas you can translate position from world (usual ImGui space) -// to virtual space and back using CanvasFromWorld()/CanvasToWorld(). -// -// Canvas can be nested in each other (they are regular widgets after all). There -// is a way to transform position between current and parent canvas with -// CanvasFromParent()/CanvasToParent(). -// -// Sometimes in more elaborate scenarios you want to move out canvas virtual space, -// do something and came back. You can do that with SuspendCanvas() and ResumeCanvas(). -// -// Note: -// It is not valid to call canvas API outside of BeginCanvas() / EndCanvas() scope. -// -// VERSION 0.1 -// -// LICENSE -// This software is dual-licensed to the public domain and under the following -// license: you are granted a perpetual, irrevocable license to copy, modify, -// publish, and distribute this file as you see fit. -// -// CREDITS -// Written by Michal Cichon -# ifndef __IMGUI_EX_CANVAS_H__ -# define __IMGUI_EX_CANVAS_H__ -# pragma once - -# include <imgui.h> -# include <imgui_internal.h> // ImRect, ImFloor - -namespace ImGuiEx { - -struct CanvasView -{ - ImVec2 Origin; - float Scale = 1.0f; - float InvScale = 1.0f; - - CanvasView() = default; - CanvasView(const ImVec2& origin, float scale) - : Origin(origin) - , Scale(scale) - , InvScale(scale ? 1.0f / scale : 0.0f) - { - } - - void Set(const ImVec2& origin, float scale) - { - *this = CanvasView(origin, scale); - } -}; - -// Canvas widget represent view over infinite plane. -// -// It acts like a child window without scroll bars with -// ability to zoom to specific part of canvas plane. -// -// Widgets are clipped according to current view exactly -// same way ImGui do. To avoid `missing widgets` artifacts first -// setup visible region with SetView() then draw content. -// -// Everything drawn with ImDrawList betwen calls to Begin()/End() -// will be drawn on canvas plane. This behavior can be suspended -// by calling Suspend() and resumed by calling Resume(). -// -// Warning: -// Please do not interleave canvas with use of channel splitter. -// Keep channel splitter contained inside canvas or always -// call canvas functions from same channel. -struct Canvas -{ - // Begins drawing content of canvas plane. - // - // When false is returned that mean canvas is not visible to the - // user can drawing should be skipped and End() not called. - // When true is returned drawing must be ended with call to End(). - // - // If any size component is equal to zero or less canvas will - // automatically expand to all available area on that axis. - // So (0, 300) will take horizontal space and have height - // of 300 points. (0, 0) will take all remaining space of - // the window. - // - // You can query size of the canvas while it is being drawn - // by calling Rect(). - bool Begin(const char* id, const ImVec2& size); - bool Begin(ImGuiID id, const ImVec2& size); - - // Ends interaction with canvas plane. - // - // Must be called only when Begin() retuned true. - void End(); - - // Sets visible region of canvas plane. - // - // Origin is an offset of infinite plane origin from top left - // corner of the canvas. - // - // Scale greater than 1 make canvas content be bigger, less than 1 smaller. - void SetView(const ImVec2& origin, float scale); - void SetView(const CanvasView& view); - - // Centers view over specific point on canvas plane. - // - // View will be centered on specific point by changing origin - // but not scale. - void CenterView(const ImVec2& canvasPoint); - - // Calculates view over specific point on canvas plane. - CanvasView CalcCenterView(const ImVec2& canvasPoint) const; - - // Centers view over specific rectangle on canvas plane. - // - // Whole rectangle will fit in canvas view. This will affect both - // origin and scale. - void CenterView(const ImRect& canvasRect); - - // Calculates view over specific rectangle on canvas plane. - CanvasView CalcCenterView(const ImRect& canvasRect) const; - - // Suspends canvas by returning to normal ImGui transformation space. - // While suspended UI will not be drawn on canvas plane. - // - // Calls to Suspend()/Resume() are symetrical. Each call to Suspend() - // must be matched with call to Resume(). - void Suspend(); - void Resume(); - - // Transforms point from canvas plane to ImGui. - ImVec2 FromLocal(const ImVec2& point) const; - ImVec2 FromLocal(const ImVec2& point, const CanvasView& view) const; - - // Transforms vector from canvas plant to ImGui. - ImVec2 FromLocalV(const ImVec2& vector) const; - ImVec2 FromLocalV(const ImVec2& vector, const CanvasView& view) const; - - // Transforms point from ImGui to canvas plane. - ImVec2 ToLocal(const ImVec2& point) const; - ImVec2 ToLocal(const ImVec2& point, const CanvasView& view) const; - - // Transforms vector from ImGui to canvas plane. - ImVec2 ToLocalV(const ImVec2& vector) const; - ImVec2 ToLocalV(const ImVec2& vector, const CanvasView& view) const; - - // Returns widget bounds. - // - // Note: - // Rect is valid after call to Begin(). - const ImRect& Rect() const { return m_WidgetRect; } - - // Returns visible region on canvas plane (in canvas plane coordinates). - const ImRect& ViewRect() const { return m_ViewRect; } - - // Calculates visible region for view. - ImRect CalcViewRect(const CanvasView& view) const; - - // Returns current view. - const CanvasView& View() const { return m_View; } - - // Returns origin of the view. - // - // Origin is an offset of infinite plane origin from top left - // corner of the canvas. - const ImVec2& ViewOrigin() const { return m_View.Origin; } - - // Returns scale of the view. - float ViewScale() const { return m_View.Scale; } - - // Returns true if canvas is suspended. - // - // See: Suspend()/Resume() - bool IsSuspended() const { return m_SuspendCounter > 0; } - -private: -# define IMGUI_EX_CANVAS_DEFERED() 0 - -# if IMGUI_EX_CANVAS_DEFERED() - struct Range - { - int BeginVertexIndex = 0; - int EndVertexIndex = 0; - int BeginComandIndex = 0; - int EndCommandIndex = 0; - }; -# endif - - void UpdateViewTransformPosition(); - - void SaveInputState(); - void RestoreInputState(); - - void SaveViewportState(); - void RestoreViewportState(); - - void EnterLocalSpace(); - void LeaveLocalSpace(); - - bool m_InBeginEnd = false; - - ImVec2 m_WidgetPosition; - ImVec2 m_WidgetSize; - ImRect m_WidgetRect; - - ImDrawList* m_DrawList = nullptr; - int m_ExpectedChannel = 0; - -# if IMGUI_EX_CANVAS_DEFERED() - ImVector<Range> m_Ranges; - Range* m_CurrentRange = nullptr; -# endif - - int m_DrawListCommadBufferSize = 0; - int m_DrawListStartVertexIndex = 0; - - CanvasView m_View; - ImRect m_ViewRect; - - ImVec2 m_ViewTransformPosition; - - int m_SuspendCounter = 0; - - float m_LastFringeScale = 1.0f; - - ImVec2 m_MousePosBackup; - ImVec2 m_MousePosPrevBackup; - ImVec2 m_MouseClickedPosBackup[IM_ARRAYSIZE(ImGuiIO::MouseClickedPos)]; - ImVec2 m_WindowCursorMaxBackup; - -# if defined(IMGUI_HAS_VIEWPORT) - ImVec2 m_WindowPosBackup; - ImVec2 m_ViewportPosBackup; - ImVec2 m_ViewportSizeBackup; -# if IMGUI_VERSION_NUM > 18002 - ImVec2 m_ViewportWorkPosBackup; - ImVec2 m_ViewportWorkSizeBackup; -# else - ImVec2 m_ViewportWorkOffsetMinBackup; - ImVec2 m_ViewportWorkOffsetMaxBackup; -# endif -# endif -}; - -} // namespace ImGuiEx - -# endif // __IMGUI_EX_CANVAS_H__
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