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/*
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* Copyright (C) 2008 Emweb bvba, Heverlee, Belgium.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <iostream>
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#include <boost/thread.hpp>
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#include <Wt/WBreak>
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#include <Wt/WContainerWidget>
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#include <Wt/WLineEdit>
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#include <Wt/WPushButton>
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#include <Wt/WText>
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#include <Wt/WProgressBar>
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#include <QApplication>
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#include "HelloApplication.h"
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#include "QtObject.h"
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class BigWorkWidget : public Wt::WContainerWidget
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{
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public:
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BigWorkWidget(Wt::WContainerWidget *parent)
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: WContainerWidget(parent)
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{
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startButton_ = new Wt::WPushButton("Start", this);
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startButton_->clicked().connect(startButton_, &Wt::WPushButton::disable);
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startButton_->clicked().connect(this, &BigWorkWidget::startBigWork);
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startButton_->setMargin(2);
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progress_ = new Wt::WProgressBar(this);
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progress_->setInline(false);
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progress_->setMinimum(0);
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progress_->setMaximum(20);
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progress_->setMargin(2);
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}
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virtual ~BigWorkWidget() {
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workThread_.join();
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}
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private:
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Wt::WPushButton *startButton_;
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Wt::WProgressBar *progress_;
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boost::thread workThread_;
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void startBigWork() {
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Wt::WApplication *app = Wt::WApplication::instance();
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// Enable server push
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app->enableUpdates(true);
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workThread_
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= boost::thread(boost::bind(&BigWorkWidget::doBigWork, this, app));
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progress_->setValue(0);
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startButton_->setText("Busy...");
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}
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/*
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* This function runs from another thread.
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*
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* From within this thread, we cannot use WApplication::instance(),
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* since that use thread-local storage. We can only access
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* WApplication::instance() after we have grabbed its update-lock.
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*/
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void doBigWork(Wt::WApplication *app)
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{
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for (unsigned i = 0; i < 20; ++i) {
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// Do 50 ms of hard work.
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boost::this_thread::sleep(boost::posix_time::milliseconds(50));
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// Get the application update lock to update the user-interface
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// with a progress indication.
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Wt::WApplication::UpdateLock uiLock(app);
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if (uiLock) {
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progress_->setValue(i + 1);
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app->triggerUpdate();
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}
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}
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Wt::WApplication::UpdateLock uiLock(app);
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if (uiLock) {
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startButton_->enable();
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startButton_->setText("Again!");
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app->triggerUpdate();
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// Disable server push
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app->enableUpdates(false);
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}
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}
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};
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// Needed when using WQApplication with Qt eventloop = true
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//#include <QApplication>
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using namespace Wt;
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Dictionary::Dictionary(const WEnvironment& env)
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: WQApplication(env, true)
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{
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/*
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* Note: do not create any Qt objects from here. Initialize your
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* application from within the virtual create() method.
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*/
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}
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void Dictionary::create()
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{
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setTitle("Hello world");
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root()->addWidget(new WText("Your name, please ? "));
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nameEdit_ = new WLineEdit(root());
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nameEdit_->setFocus();
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WPushButton *b = new WPushButton("Greet me.", root());
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b->setMargin(5, Left);
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root()->addWidget(new WBreak());
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greeting_ = new WText(root());
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b->clicked().connect(this, &Dictionary::propagateGreet);
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nameEdit_->enterPressed().connect(this, &Dictionary::propagateGreet);
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qtSender_ = new QtObject(this);
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qtReceiver_ = new QtObject(this);
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QObject::connect(qtSender_, SIGNAL(greet(const QString&)),
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qtReceiver_, SLOT(doGreet(const QString&)));
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new BigWorkWidget(root());
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}
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void Dictionary::destroy()
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{
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/*
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* Note: Delete any Qt object from here.
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*/
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delete qtSender_;
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delete qtReceiver_;
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}
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void Dictionary::propagateGreet()
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{
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qtSender_->passGreet(toQString(nameEdit_->text()));
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}
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void Dictionary::doGreet(const QString& qname)
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{
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greeting_->setText("Hello there, " + toWString(qname));
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}
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WApplication *createApplication(const WEnvironment& env)
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{
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return new Dictionary(env);
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}
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int main(int argc, char **argv)
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{
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// Needed for Qt's eventloop threads to work
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QApplication app(argc, argv);
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return WRun(argc, argv, &createApplication);
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}
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