mirror of
https://gitea.wildfiregames.com/0ad/0ad
synced 2026-06-16 05:13:58 -07:00
8c250568e7
This PR introduces a new ScrollPanel component with the following capabilities: - Scroll Orientation Support: Allows scrolling in horizontal, vertical, or both directions, providing flexibility for different use cases. - Partial Object Rendering: Supports partial rendering of objects that are only partially visible within the scroll boundaries, improving visual accuracy and performance. - Boundary-Constrained Mouse Interaction: Handles mouse events strictly within the panel's visible boundaries, preventing interaction with objects outside the scrollable area. - Minimum Internal Size (min_width, min_height): Introduces support for virtual space management, allowing the panel to maintain a minimum internal size independent of its actual on-screen dimensions. Even when the panel is resized, this ensures that the content respects a defined virtual space (with min_width and min_height), effectively simulating a larger internal canvas. This is particularly useful for large content or scenarios where a more extensive scrollable area is required than the current visible panel.
127 lines
3 KiB
C++
127 lines
3 KiB
C++
/* Copyright (C) 2024 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef INCLUDED_RECT
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#define INCLUDED_RECT
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class CSize2D;
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class CVector2D;
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/**
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* Rectangle class used for screen rectangles. It's very similar to the MS
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* CRect, but with FLOATS because it's meant to be used with OpenGL which
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* takes float values.
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*/
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class CRect
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{
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public:
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CRect();
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CRect(const CVector2D& pos);
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CRect(const CSize2D& size);
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CRect(const CVector2D& upperleft, const CVector2D& bottomright);
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CRect(const CVector2D& pos, const CSize2D& size);
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CRect(const float l, const float t, const float r, const float b);
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CRect(const CRect&);
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CRect& operator=(const CRect& a);
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bool operator==(const CRect& a) const;
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bool operator!=(const CRect& a) const;
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CRect operator-() const;
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CRect operator+() const;
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CRect operator+(const CRect& a) const;
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CRect operator+(const CVector2D& a) const;
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CRect operator+(const CSize2D& a) const;
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CRect operator-(const CRect& a) const;
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CRect operator-(const CVector2D& a) const;
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CRect operator-(const CSize2D& a) const;
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void operator+=(const CRect& a);
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void operator+=(const CVector2D& a);
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void operator+=(const CSize2D& a);
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void operator-=(const CRect& a);
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void operator-=(const CVector2D& a);
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void operator-=(const CSize2D& a);
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operator bool() const { return right - left > 0 && bottom - top > 0; }
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/**
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* @return Width of Rectangle
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*/
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float GetWidth() const;
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/**
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* @return Height of Rectangle
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*/
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float GetHeight() const;
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/**
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* Get Size
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*/
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CSize2D GetSize() const;
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/**
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* Get Position equivalent to top/left corner
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*/
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CVector2D TopLeft() const;
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/**
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* Get Position equivalent to top/right corner
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*/
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CVector2D TopRight() const;
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/**
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* Get Position equivalent to bottom/left corner
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*/
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CVector2D BottomLeft() const;
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/**
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* Get Position equivalent to bottom/right corner
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*/
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CVector2D BottomRight() const;
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/**
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* Get Position equivalent to the center of the rectangle
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*/
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CVector2D CenterPoint() const;
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/**
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* Evalutates if point is within the rectangle
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* @param point CVector2D representing point
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* @return true if inside.
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*/
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bool PointInside(const CVector2D &point) const;
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CRect Scale(float x, float y) const;
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bool IntersectWith(const CRect& a) const;
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CRect Intersection(const CRect& a) const;
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/**
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* Returning CVector2D representing each corner.
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*/
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public:
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/**
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* Dimensions
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*/
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float left, top, right, bottom;
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};
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#endif // INCLUDED_RECT
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