examples/7guis/cells/src/main.cpp

Note

This Source File belongs to 7GUIs Cells Example. Please follow the link for example explanation.

/*
 * AUI Framework - Declarative UI toolkit for modern C++20
 * Copyright (C) 2020-2025 Alex2772 and Contributors
 *
 * SPDX-License-Identifier: MPL-2.0
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */
 
#include <AUI/Platform/Entry.h>
#include <AUI/Platform/AWindow.h>
#include <AUI/Util/UIBuildingHelpers.h>
#include <AUI/View/AButton.h>
#include "AUI/View/ATextField.h"
#include "AUI/View/AScrollArea.h"
#include "AUI/View/AGridSplitter.h"
#include "Spreadsheet.h"
 
using namespace declarative;
using namespace ass;
 
struct State {
   Spreadsheet spreadsheet{glm::uvec2 { 'Z' - 'A' + 1, 100 }};
   AProperty<AString> currentExpression;
};
 
static _<AView> labelTitle(AString s) {
   return _new<ALabel>(std::move(s)) with_style {
       Opacity { 0.5f },
       ATextAlign::CENTER,
   };
}
 
class CellView : public AViewContainer {
public:
   CellView(_<State> state, Cell& cell) : mState(std::move(state)), mCell(cell) { inflateLabel(); }
   int getContentMinimumWidth() override { return 0; }
   int getContentMinimumHeight() override { return 0; }
 
private:
   _<State> mState;
   Cell& mCell;
   AAbstractSignal::AutoDestroyedConnection mConnection;
 
   void inflateLabel() {
       mConnection = connect(mCell.value, [this](const formula::Value& v) {
           ALayoutInflater::inflate(
               this,
               std::visit(
                   aui::lambda_overloaded {
                     [](std::nullopt_t) -> _<AView> { return _new<AView>(); },
                     [](double v) -> _<AView> { return Label { "{}"_format(v) } with_style { ATextAlign::RIGHT }; },
                     [](const AString& v) -> _<AView> { return Label { "{}"_format(v) }; },
                     [](const formula::Range& v) -> _<AView> { return Label { "#RANGE?" }; },
                   },
                   v));
           connect(getViews().first()->clicked, me::inflateEditor);
       });
   }
 
   void inflateEditor() {
       mState->currentExpression = mCell.expression;
       ALayoutInflater::inflate(
           this,
           _new<ATextField>() with_style {
                 MinSize { 0 },
                 Margin { 0 },
                 BorderRadius { 0 },
               } let {
                   it && mState->currentExpression;
                   it->focus();
                   connect(it->focusLost, me::commitExpression);
               });
   }
 
   void commitExpression() {
       mCell.expression = mState->currentExpression;
       inflateLabel();
   }
};
 
class CellsView : public AViewContainer {
public:
   CellsView(_<State> state) : mState(std::move(state)) {
       ALayoutInflater::inflate(
           this,
           AGridSplitter::Builder()
                   .noDefaultSpacers()
                   .withItems([&] {
                       AVector<AVector<_<AView>>> views;
                       views.resize(mState->spreadsheet.size().y + 1);
                       for (auto& c : views) {
                           c.resize(mState->spreadsheet.size().x + 1);
                       }
 
                       views[0][0] = _new<AView>();   // blank
                       for (unsigned i = 0; i < mState->spreadsheet.size().x; ++i) {
                           views[0][i + 1] = Centered{ labelTitle(Cell::columnName(i)) } with_style { Expanding(1, 0) };
                       }
                       for (unsigned row = 0; row < mState->spreadsheet.size().y; ++row) {
                           views[row + 1][0] = labelTitle("{}"_format(Cell::rowName(row)));
                           for (unsigned column = 0; column < mState->spreadsheet.size().x; ++column) {
                               views[row + 1][column + 1] = _new<CellView>(mState, mState->spreadsheet[{ column, row }]) with_style {
                                   BackgroundSolid { AColor::WHITE },
                               };
                           }
                       }
                       return views;
                   }())
                   .build() with_style { Expanding(), LayoutSpacing { 1_dp }, MinSize { 80_dp * float(mState->spreadsheet.size().x), {} } });
   }
 
private:
   _<State> mState;
};
 
class CellsWindow : public AWindow {
public:
   CellsWindow() : AWindow("AUI - 7GUIs - Cells", 500_dp, 400_dp) {
       setContents(Centered {
         AScrollArea::Builder()
                 .withContents(Horizontal { _new<CellsView>(_new<State>()) })
                 .build() with_style {
               Expanding(),
               ScrollbarAppearance(ScrollbarAppearance::ALWAYS, ScrollbarAppearance::ALWAYS),
             },
       } with_style { Padding(0) });
   }
};
 
AUI_ENTRY {
   _new<CellsWindow>()->show();
   return 0;
}

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