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// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "taskwidget.h"
#include <utils/async.h>
#include <utils/futuresynchronizer.h>
#include <utils/layoutbuilder.h>
#include <utils/theme/theme_p.h>
#include <QApplication>
#include <QCheckBox>
#include <QProgressBar>
#include <QScrollArea>
#include <QTimer>
#include <QToolButton>
using namespace Utils;
// TODO: make tasks cancellable
static void sleepInThread(QPromise<void> &promise, int seconds, bool reportSuccess)
{
QThread::sleep(seconds);
if (!reportSuccess)
promise.future().cancel();
}
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
setCreatorTheme(new Theme("default", &app));
QWidget mainWidget;
mainWidget.setWindowTitle("Task Tree Demo");
// Non-task GUI
QToolButton *startButton = new QToolButton();
startButton->setText("Start");
QToolButton *stopButton = new QToolButton();
stopButton->setText("Stop");
QToolButton *resetButton = new QToolButton();
resetButton->setText("Reset");
QProgressBar *progressBar = new QProgressBar();
QCheckBox *synchronizerCheckBox = new QCheckBox("Use Future Synchronizer");
synchronizerCheckBox->setChecked(true);
QScrollArea *scrollArea = new QScrollArea();
scrollArea->setWidgetResizable(true);
QWidget *scrollAreaWidget = new QWidget();
// Task GUI
QList<StateWidget *> allStateWidgets;
auto createGroupWidget = [&allStateWidgets] {
auto *widget = new GroupWidget();
allStateWidgets.append(widget);
return widget;
};
auto createTaskWidget = [&allStateWidgets] {
auto *widget = new TaskWidget();
allStateWidgets.append(widget);
return widget;
};
GroupWidget *rootGroup = createGroupWidget();
GroupWidget *groupTask_1 = createGroupWidget();
TaskWidget *task_1_1 = createTaskWidget();
TaskWidget *task_1_2 = createTaskWidget();
TaskWidget *task_1_3 = createTaskWidget();
TaskWidget *task_2 = createTaskWidget();
TaskWidget *task_3 = createTaskWidget();
GroupWidget *groupTask_4 = createGroupWidget();
TaskWidget *task_4_1 = createTaskWidget();
TaskWidget *task_4_2 = createTaskWidget();
GroupWidget *groupTask_4_3 = createGroupWidget();
TaskWidget *task_4_3_1 = createTaskWidget();
TaskWidget *task_4_3_2 = createTaskWidget();
TaskWidget *task_4_3_3 = createTaskWidget();
TaskWidget *task_4_3_4 = createTaskWidget();
TaskWidget *task_4_4 = createTaskWidget();
TaskWidget *task_4_5 = createTaskWidget();
TaskWidget *task_5 = createTaskWidget();
// Task initial configuration
task_1_2->setBusyTime(2);
task_1_2->setSuccess(false);
task_1_3->setBusyTime(3);
task_4_3_1->setBusyTime(4);
task_4_3_2->setBusyTime(2);
task_4_3_3->setBusyTime(1);
task_4_3_4->setBusyTime(3);
task_4_3_4->setSuccess(false);
task_4_4->setBusyTime(6);
task_4_4->setBusyTime(3);
groupTask_1->setWorkflowPolicy(Tasking::WorkflowPolicy::ContinueOnDone);
groupTask_4->setWorkflowPolicy(Tasking::WorkflowPolicy::Optional);
groupTask_4_3->setExecuteMode(ExecuteMode::Parallel);
groupTask_4_3->setWorkflowPolicy(Tasking::WorkflowPolicy::StopOnError);
// Task layout
{
using namespace Layouting;
Column {
TaskGroup { rootGroup, {
TaskGroup { groupTask_1, {
task_1_1, hr,
task_1_2, hr,
task_1_3,
}}, hr,
task_2, hr,
task_3, hr,
TaskGroup { groupTask_4, {
task_4_1, hr,
task_4_2, hr,
TaskGroup { groupTask_4_3, {
task_4_3_1, hr,
task_4_3_2, hr,
task_4_3_3, hr,
task_4_3_4,
}}, hr,
task_4_4, hr,
task_4_5,
}}, hr,
task_5
}}, st
}.attachTo(scrollAreaWidget);
scrollArea->setWidget(scrollAreaWidget);
Column {
Row { startButton, stopButton, resetButton, synchronizerCheckBox, progressBar },
hr,
scrollArea
}.attachTo(&mainWidget);
}
// Task tree creator (takes configuation from GUI)
using namespace Tasking;
std::unique_ptr<TaskTree> taskTree;
FutureSynchronizer synchronizer;
auto treeRoot = [&] {
auto taskItem = [sync = &synchronizer, synchronizerCheckBox](TaskWidget *widget) {
const auto setupHandler = [=](Async<void> &task) {
task.setConcurrentCallData(sleepInThread, widget->busyTime(), widget->isSuccess());
if (synchronizerCheckBox->isChecked())
task.setFutureSynchronizer(sync);
widget->setState(State::Running);
};
const auto doneHandler = [widget](const Async<void> &) {
widget->setState(State::Done);
};
const auto errorHandler = [widget](const Async<void> &) {
widget->setState(State::Error);
};
return AsyncTask<void>(setupHandler, doneHandler, errorHandler);
};
const Group root {
rootGroup->executeMode(),
Workflow(rootGroup->workflowPolicy()),
OnGroupSetup([rootGroup] { rootGroup->setState(State::Running); }),
OnGroupDone([rootGroup] { rootGroup->setState(State::Done); }),
OnGroupError([rootGroup] { rootGroup->setState(State::Error); }),
Group {
groupTask_1->executeMode(),
Workflow(groupTask_1->workflowPolicy()),
OnGroupSetup([groupTask_1] { groupTask_1->setState(State::Running); }),
OnGroupDone([groupTask_1] { groupTask_1->setState(State::Done); }),
OnGroupError([groupTask_1] { groupTask_1->setState(State::Error); }),
taskItem(task_1_1),
taskItem(task_1_2),
taskItem(task_1_3)
},
taskItem(task_2),
taskItem(task_3),
Group {
groupTask_4->executeMode(),
Workflow(groupTask_4->workflowPolicy()),
OnGroupSetup([groupTask_4] { groupTask_4->setState(State::Running); }),
OnGroupDone([groupTask_4] { groupTask_4->setState(State::Done); }),
OnGroupError([groupTask_4] { groupTask_4->setState(State::Error); }),
taskItem(task_4_1),
taskItem(task_4_2),
Group {
groupTask_4_3->executeMode(),
Workflow(groupTask_4_3->workflowPolicy()),
OnGroupSetup([groupTask_4_3] { groupTask_4_3->setState(State::Running); }),
OnGroupDone([groupTask_4_3] { groupTask_4_3->setState(State::Done); }),
OnGroupError([groupTask_4_3] { groupTask_4_3->setState(State::Error); }),
taskItem(task_4_3_1),
taskItem(task_4_3_2),
taskItem(task_4_3_3),
taskItem(task_4_3_4)
},
taskItem(task_4_4),
taskItem(task_4_5)
},
taskItem(task_5)
};
return root;
};
// Non-task GUI handling
auto createTaskTree = [&] {
TaskTree *taskTree = new TaskTree(treeRoot());
progressBar->setMaximum(taskTree->progressMaximum());
QObject::connect(taskTree, &TaskTree::progressValueChanged,
progressBar, &QProgressBar::setValue);
return taskTree;
};
auto stopTaskTree = [&] {
if (taskTree)
taskTree->stop();
// TODO: unlock GUI controls?
};
auto resetTaskTree = [&] {
if (!taskTree)
return;
stopTaskTree();
taskTree.reset();
for (StateWidget *widget : allStateWidgets)
widget->setState(State::Initial);
progressBar->setValue(0);
};
auto startTaskTree = [&] {
resetTaskTree();
taskTree.reset(createTaskTree());
taskTree->start();
// TODO: lock GUI controls?
};
QObject::connect(startButton, &QAbstractButton::clicked, startTaskTree);
QObject::connect(stopButton, &QAbstractButton::clicked, stopTaskTree);
QObject::connect(resetButton, &QAbstractButton::clicked, resetTaskTree);
// Hack in order to show initial size minimal, but without scrollbars.
// Apparently setSizeAdjustPolicy(QAbstractScrollArea::AdjustToContentsOnFirstShow) doesn't work.
const int margin = 2;
scrollArea->setMinimumSize(scrollAreaWidget->minimumSizeHint().grownBy({0, 0, margin, margin}));
QTimer::singleShot(0, scrollArea, [&] { scrollArea->setMinimumSize({0, 0}); });
mainWidget.show();
return app.exec();
}
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