80 lines
3.4 KiB
C++
80 lines
3.4 KiB
C++
/*
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* InfiniPaint
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* Copyright (C) 2025-2026 Yousef Khadadeh
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*
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* This program 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 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "ManyElementScrollArea.hpp"
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#include "../GUIManager.hpp"
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namespace GUIStuff {
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ManyElementScrollArea::ManyElementScrollArea(GUIManager& gui): Element(gui) {}
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void ManyElementScrollArea::layout(const Clay_ElementId& id, const Options& opts) {
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options = opts;
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CLAY(id, {
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.layout = {.sizing = {.width = CLAY_SIZING_GROW(0), .height = CLAY_SIZING_GROW(0)}}
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}) {
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if(boundingBox.has_value()) {
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scrollArea = gui.clipping_element<ScrollArea>("scroll area", ScrollArea::Options{
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.scrollVertical = true,
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.clipHorizontal = options.clipHorizontal,
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.clipVertical = true,
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.scrollbarY = options.scrollbar,
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.xAlign = options.xAlign,
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.yAlign = CLAY_ALIGN_Y_TOP,
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.innerContent = [&](const ScrollArea::InnerContentParameters& params) {
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if(options.innerContentExtraCallback) options.innerContentExtraCallback(params);
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float absScrollAmount = std::fabs(params.scrollOffset->y());
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size_t startPoint = absScrollAmount / options.entryHeight;
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size_t elementsContainable = (boundingBox.value().height() / options.entryHeight) + 2; // Displaying 2 more elements ensures that there isn't any empty space in the container
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size_t endPoint = std::min(options.entryCount, startPoint + elementsContainable);
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if(startPoint != 0) {
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CLAY_AUTO_ID({
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.layout = {
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.sizing = {.width = CLAY_SIZING_GROW(0), .height = CLAY_SIZING_FIXED(startPoint * options.entryHeight)},
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}
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}) { }
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}
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gui.new_id("many element list", [&] {
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for(size_t i = startPoint; i < endPoint; i++) {
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gui.new_id(i - startPoint, [&] {
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CLAY_AUTO_ID({
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.layout = { .sizing = {.width = options.xElementSize, .height = CLAY_SIZING_FIXED(options.entryHeight)}}
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}) {
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options.elementContent(i);
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}
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});
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}
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});
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if(endPoint != options.entryCount) {
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CLAY_AUTO_ID({
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.layout = {
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.sizing = {.width = CLAY_SIZING_GROW(0), .height = CLAY_SIZING_FIXED((options.entryCount - endPoint) * options.entryHeight)},
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}
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}) { }
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}
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}
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});
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}
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}
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}
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}
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