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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.
66 lines
1.9 KiB
C++
66 lines
1.9 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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#include "precompiled.h"
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#include "IGUIScrollBarOwner.h"
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#include "gui/CGUI.h"
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#include "gui/IGUIScrollBar.h"
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#include "gui/ObjectBases/IGUIObject.h"
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IGUIScrollBarOwner::IGUIScrollBarOwner(IGUIObject& pObject)
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: m_pObject(pObject)
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{
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}
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IGUIScrollBarOwner::~IGUIScrollBarOwner() = default;
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void IGUIScrollBarOwner::ResetStates()
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{
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for (const std::unique_ptr<IGUIScrollBar>& scrollBar : m_ScrollBars)
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scrollBar->SetBarPressed(false);
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}
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void IGUIScrollBarOwner::AddScrollBar(std::unique_ptr<IGUIScrollBar> scrollbar)
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{
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scrollbar->SetHostObject(this);
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m_ScrollBars.emplace_back(std::move(scrollbar));
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}
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const SGUIScrollBarStyle* IGUIScrollBarOwner::GetScrollBarStyle(const CStr& style) const
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{
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return m_pObject.GetGUI().GetScrollBarStyle(style);
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}
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void IGUIScrollBarOwner::HandleMessage(SGUIMessage& msg)
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{
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for (const std::unique_ptr<IGUIScrollBar>& scrollBar : m_ScrollBars)
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if (scrollBar->IsVisible())
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scrollBar->HandleMessage(msg);
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}
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void IGUIScrollBarOwner::Draw(CCanvas2D& canvas)
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{
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for (const std::unique_ptr<IGUIScrollBar>& scrollBar : m_ScrollBars)
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scrollBar->Draw(canvas);
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}
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float IGUIScrollBarOwner::GetScrollBarPos(const int index) const
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{
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return m_ScrollBars[index]->GetPos();
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}
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