LogarithmPlotter/qml/History.qml

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/**
* Logarithm Graph Creator - Create graphs with logarithm scales.
* Copyright (C) 2020 Ad5001
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
import QtQuick 2.12
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import QtQml 2.12
import "js/objects.js" as Objects
import "js/historylib.js" as HistoryLib
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Item {
// Using a QtObject is necessary in order to have proper property propagation in QML
id: historyObj
property int undoCount: 0
property int redoCount: 0
property var undoStack: []
property var redoStack: []
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function clear() {
undoStack = []
redoStack = []
}
function serialize() {
let undoSt = [], redoSt = [];
for(let i = 0; i < undoCount; i++)
undoSt.push([
undoStack[i].type(),
undoStack[i].export()
]);
for(let i = 0; i < redoCount; i++)
redoSt.push([
redoStack[i].type(),
redoStack[i].export()
]);
return [undoSt, redoSt]
}
function unserialize(undoSt, redoSt) {
clear();
for(let i = 0; i < undoSt.length; i++)
undoStack.push(new HistoryLib.Actions[undoSt[i][0]](...undoSt[i][1]))
for(let i = 0; i < redoSt.length; i++)
redoStack.push(new HistoryLib.Actions[redoSt[i][0]](...redoSt[i][1]))
undoCount = undoSt.length;
redoCount = redoSt.length;
objectLists.update()
}
function addToHistory(action) {
if(action instanceof HistoryLib.Action) {
console.log("Added new entry to history: " + action.getReadableString())
undoStack.push(action)
undoCount++;
redoStack = []
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redoCount = 0
}
}
function undo() {
if(undoStack.length > 0) {
var action = undoStack.pop()
action.undo()
objectLists.update()
redoStack.push(action)
undoCount--;
redoCount++;
}
}
function redo() {
if(redoStack.length > 0) {
var action = redoStack.pop()
action.redo()
objectLists.update()
undoStack.push(action)
undoCount++;
redoCount--;
}
}
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function undoMultipleDefered(toUndoCount) {
undoTimer.toUndoCount = toUndoCount;
undoTimer.start()
}
function redoMultipleDefered(toRedoCount) {
redoTimer.toRedoCount = toRedoCount;
redoTimer.start()
}
Timer {
id: undoTimer
interval: 5; running: false; repeat: true
property int toUndoCount: 0
onTriggered: {
if(toUndoCount > 0) {
historyObj.undo()
toUndoCount--;
} else {
running = false;
}
}
}
Timer {
id: redoTimer
interval: 5; running: false; repeat: true
property int toRedoCount: 0
onTriggered: {
if(toRedoCount > 0) {
historyObj.redo()
toRedoCount--;
} else {
running = false;
}
}
}
Component.onCompleted: {
Objects.history = historyObj
Objects.HistoryLib = HistoryLib
}
}