Wt examples  3.3.8
Public Member Functions | Private Member Functions | Private Attributes | List of all members
JavascriptExample Class Reference
Javascript - Wt interaction example

An example showing how to interact custom JavaScript with Wt stuff. More...

#include <JavascriptExample.h>

Inheritance diagram for JavascriptExample:
Inheritance graph
[legend]

Public Member Functions

 JavascriptExample (const WEnvironment &env)
 Create the example application. More...
 
- Public Member Functions inherited from Wt::WApplication
 WApplication (const WEnvironment &environment)
 
 ~WApplication ()
 
const WEnvironment & environment () const
 
WContainerWidget * root () const
 
WWidget * findWidget (const std::string &name)
 
void setTitle (const WString &title)
 
const WString & title () const
 
const WString & closeMessage () const
 
WLocalizedStrings * localizedStrings ()
 
void setLocalizedStrings (WLocalizedStrings *stringResolver)
 
WMessageResourceBundle & messageResourceBundle ()
 
void setLocale (const WLocale &locale)
 
const WLocale & locale () const
 
virtual void refresh ()
 
void bindWidget (WWidget *widget, const std::string &domId)
 
std::string docRoot () const
 
void setConnectionMonitor (const std::string &jsObject)
 
std::string sessionId () const
 
void changeSessionId ()
 
void processEvents ()
 
virtual void waitForEvent ()
 
void setAjaxMethod (AjaxMethod method)
 
AjaxMethod ajaxMethod () const
 
virtual void initialize ()
 
virtual void finalize ()
 
void setTwoPhaseRenderingThreshold (int size)
 
void setCookie (const std::string &name, const std::string &value, int maxAge, const std::string &domain="", const std::string &path="", bool secure=false)
 
void removeCookie (const std::string &name, const std::string &domain="", const std::string &path="")
 
void addMetaLink (const std::string &href, const std::string &rel, const std::string &media, const std::string &hreflang, const std::string &type, const std::string &sizes, bool disabled)
 
void removeMetaLink (const std::string &href)
 
void addMetaHeader (const std::string &name, const WString &content, const std::string &lang="")
 
void addMetaHeader (MetaHeaderType type, const std::string &name, const WString &content, const std::string &lang="")
 
WString metaHeader (MetaHeaderType type, const std::string &name) const
 
void removeMetaHeader (MetaHeaderType type, const std::string &name="")
 
WLogEntry log (const std::string &type) const
 
void setLoadingIndicator (WLoadingIndicator *indicator)
 
WLoadingIndicator * loadingIndicator () const
 
void quit ()
 
void quit (const WString &restartMessage)
 
bool isQuited () const
 
bool hasQuit () const
 
::int64_t maximumRequestSize () const
 
Signal< ::int64_t > & requestTooLarge ()
 
void setConfirmCloseMessage (const WString &message)
 
void enableInternalPaths ()
 
void deferRendering ()
 
void resumeRendering ()
 
boost::function< void()> bind (const F &f)
 
std::string encodeUntrustedUrl (const std::string &url) const
 
void pushExposedConstraint (WWidget *w)
 
WCssStyleSheet & styleSheet ()
 
void useStyleSheet (const WLink &link, const std::string &media="all")
 
void useStyleSheet (const WLink &link, const std::string &condition, const std::string &media)
 
void useStyleSheet (const WCssStyleSheet &styleSheet, const std::string &condition="")
 
void removeStyleSheet (const WLink &link)
 
void setTheme (const WTheme *theme)
 
const WTheme * theme () const
 
void setCssTheme (const std::string &name)
 
void setLayoutDirection (LayoutDirection direction)
 
LayoutDirection layoutDirection () const
 
void setBodyClass (const std::string &styleClass)
 
std::string bodyClass () const
 
void setHtmlClass (const std::string &styleClass)
 
std::string htmlClass () const
 
std::string url (const std::string &internalPath=std::string()) const
 
virtual std::string makeAbsoluteUrl (const std::string &url) const
 
std::string resolveRelativeUrl (const std::string &url) const
 
std::string bookmarkUrl () const
 
std::string bookmarkUrl (const std::string &internalPath) const
 
void setInternalPath (const std::string &path, bool emitChange=false)
 
void setInternalPathDefaultValid (bool valid)
 
bool internalPathDefaultValid () const
 
void setInternalPathValid (bool valid)
 
bool internalPathValid () const
 
std::string internalPath () const
 
std::string internalPathNextPart (const std::string &path) const
 
std::string internalSubPath (const std::string &path) const
 
bool internalPathMatches (const std::string &path) const
 
Signal< std::string > & internalPathChanged ()
 
Signal< std::string > & internalPathInvalid ()
 
void redirect (const std::string &url)
 
void enableUpdates (bool enabled=true)
 
bool updatesEnabled () const
 
void triggerUpdate ()
 
UpdateLock getUpdateLock ()
 
void attachThread (bool attach=true)
 
void doJavaScript (const std::string &javascript, bool afterLoaded=true)
 
void addAutoJavaScript (const std::string &javascript)
 
void declareJavaScriptFunction (const std::string &name, const std::string &function)
 
bool require (const std::string &url, const std::string &symbol=std::string())
 
bool requireJQuery (const std::string &url)
 
bool customJQuery () const
 
void setJavaScriptClass (const std::string &className)
 
std::string javaScriptClass ()
 
EventSignal< WKeyEvent > & globalKeyWentDown ()
 
EventSignal< WKeyEvent > & globalKeyPressed ()
 
EventSignal< WKeyEvent > & globalKeyWentUp ()
 
EventSignal & globalEnterPressed ()
 
EventSignal & globalEscapePressed ()
 
WCssStyleSheet & styleSheet ()
 
void useStyleSheet (const WLink &link, const std::string &media="all")
 
void useStyleSheet (const WLink &link, const std::string &condition, const std::string &media)
 
void useStyleSheet (const WCssStyleSheet &styleSheet, const std::string &condition="")
 
void removeStyleSheet (const WLink &link)
 
void setTheme (const WTheme *theme)
 
const WTheme * theme () const
 
void setCssTheme (const std::string &name)
 
void setLayoutDirection (LayoutDirection direction)
 
LayoutDirection layoutDirection () const
 
void setBodyClass (const std::string &styleClass)
 
std::string bodyClass () const
 
void setHtmlClass (const std::string &styleClass)
 
std::string htmlClass () const
 
std::string url (const std::string &internalPath=std::string()) const
 
virtual std::string makeAbsoluteUrl (const std::string &url) const
 
std::string resolveRelativeUrl (const std::string &url) const
 
std::string bookmarkUrl () const
 
std::string bookmarkUrl (const std::string &internalPath) const
 
void setInternalPath (const std::string &path, bool emitChange=false)
 
void setInternalPathDefaultValid (bool valid)
 
bool internalPathDefaultValid () const
 
void setInternalPathValid (bool valid)
 
bool internalPathValid () const
 
std::string internalPath () const
 
std::string internalPathNextPart (const std::string &path) const
 
std::string internalSubPath (const std::string &path) const
 
bool internalPathMatches (const std::string &path) const
 
Signal< std::string > & internalPathChanged ()
 
Signal< std::string > & internalPathInvalid ()
 
void redirect (const std::string &url)
 
void enableUpdates (bool enabled=true)
 
bool updatesEnabled () const
 
void triggerUpdate ()
 
UpdateLock getUpdateLock ()
 
void attachThread (bool attach=true)
 
void doJavaScript (const std::string &javascript, bool afterLoaded=true)
 
void addAutoJavaScript (const std::string &javascript)
 
void declareJavaScriptFunction (const std::string &name, const std::string &function)
 
bool require (const std::string &url, const std::string &symbol=std::string())
 
bool requireJQuery (const std::string &url)
 
bool customJQuery () const
 
void setJavaScriptClass (const std::string &className)
 
std::string javaScriptClass ()
 
EventSignal< WKeyEvent > & globalKeyWentDown ()
 
EventSignal< WKeyEvent > & globalKeyPressed ()
 
EventSignal< WKeyEvent > & globalKeyWentUp ()
 
EventSignal & globalEnterPressed ()
 
EventSignal & globalEscapePressed ()
 
- Public Member Functions inherited from Wt::WObject
 WObject (WObject *parent=0)
 
virtual ~WObject ()
 
virtual const std::string id () const
 
virtual void setObjectName (const std::string &name)
 
virtual std::string objectName () const
 
void resetLearnedSlots ()
 
void resetLearnedSlot (void(T::*method)())
 
WStatelessSlot * implementStateless (void(T::*method)())
 
WStatelessSlot * implementStateless (void(T::*method)(), void(T::*undoMethod)())
 
void isNotStateless ()
 
WStatelessSlot * implementJavaScript (void(T::*method)(), const std::string &jsCode)
 
void addChild (WObject *child)
 
virtual void removeChild (WObject *child)
 
const std::vector< WObject * > & children () const
 
WObject * parent () const
 

Private Member Functions

void confirmed ()
 The user has confirmed the payment. More...
 
void setAmount (std::string amount)
 Set the amount to be payed. More...
 

Private Attributes

Popup * promptAmount_
 Popup for changing the amount. More...
 
Popup * confirmPay_
 Popup for paying. More...
 
WText * currentAmount_
 WText for showing the current amount. More...
 

Additional Inherited Members

- Public Types inherited from Wt::WApplication
enum  AjaxMethod
 
typedef Wt::ApplicationCreator ApplicationCreator
 
typedef boost::function< WApplication *(const WEnvironment &)> ApplicationCreator
 
- Public Types inherited from Wt::WObject
typedef void(WObject::* Method) ()
 
- Static Public Member Functions inherited from Wt::WApplication
static WApplication * instance ()
 
static std::string resourcesUrl ()
 
static std::string relativeResourcesUrl ()
 
static std::string appRoot ()
 
static bool readConfigurationProperty (const std::string &name, std::string &value)
 
- Public Attributes inherited from Wt::WApplication
 XMLHttpRequest
 
 DynamicScriptTag
 
- Protected Member Functions inherited from Wt::WApplication
virtual void notify (const WEvent &e)
 
virtual bool isExposed (WWidget *w) const
 
virtual void enableAjax ()
 
virtual void unload ()
 
virtual void handleJavaScriptError (const std::string &errorText)
 
- Protected Member Functions inherited from Wt::WObject
virtual WStatelessSlot * getStateless (Method method)
 
- Static Protected Member Functions inherited from Wt::WObject
static WObject * sender ()
 

Detailed Description

An example showing how to interact custom JavaScript with Wt stuff.

Definition at line 24 of file JavascriptExample.h.

Constructor & Destructor Documentation

JavascriptExample::JavascriptExample ( const WEnvironment &  env)

Create the example application.

Definition at line 19 of file JavascriptExample.C.

20  : WApplication(env)
21 {
22  setTitle("Javascript example");
23 
24  // Create a popup for prompting the amount of money, and connect the
25  // okPressed button to the slot for setting the amount of money.
26  //
27  // Note that the input provided by the user in the prompt box is passed as
28  // an argument to the slot.
29  promptAmount_ = Popup::createPrompt("How much do you want to pay?", "",
30  this);
31  promptAmount_->okPressed().connect(this, &JavascriptExample::setAmount);
32 
33  // Create a popup for confirming the payment.
34  //
35  // Since a confirm popup does not allow input, we ignore the
36  // argument carrying the input (which will be empty anyway).
37  confirmPay_ = Popup::createConfirm("", this);
38  confirmPay_->okPressed().connect(this, &JavascriptExample::confirmed);
39 
40  new WText("<h2>Wt Javascript example</h2>"
41  "<p>Wt makes abstraction of Javascript, and therefore allows you"
42  " to develop web applications without any knowledge of Javascript,"
43  " and which are not dependent on Javascript."
44  " However, Wt does allow you to add custom Javascript code:</p>"
45  " <ul>"
46  " <li>To call custom JavaScript code from an event handler, "
47  "connect the Wt::EventSignal to a Wt::JSlot.</li>"
48  " <li>To call C++ code from custom JavaScript, use "
49  "Wt.emit() to emit a Wt::JSignal.</li>"
50  " <li>To call custom JavaScript code from C++, use "
51  "WApplication::doJavascript() or Wt::JSlot::exec().</li>"
52  " </ul>"
53  "<p>This simple application shows how to interact between C++ and"
54  " JavaScript using the JSlot and JSignal classes.</p>", root());
55 
56  currentAmount_
57  = new WText("Current amount: $" + promptAmount_->defaultValue(), root());
58 
59  WPushButton *amountButton = new WPushButton("Change ...", root());
60  amountButton->setMargin(10, Left | Right);
61 
62  new WBreak(root());
63 
64  WPushButton *confirmButton = new WPushButton("Pay now.", root());
65  confirmButton->setMargin(10, Top | Bottom);
66 
67  // Connect the event handlers to a JSlot: this will execute the JavaScript
68  // immediately, without a server round trip.
69  amountButton->clicked().connect(promptAmount_->show);
70  confirmButton->clicked().connect(confirmPay_->show);
71 
72  // Set the initial amount
73  setAmount("1000");
74 }
JavascriptExample::promptAmount_
Popup * promptAmount_
Popup for changing the amount.
Definition: JavascriptExample.h:42
Popup::createConfirm
static Popup * createConfirm(const WString &message, WObject *parent=0)
Create a confirm dialog.
Definition: Popup.C:72
JavascriptExample::confirmed
void confirmed()
The user has confirmed the payment.
Definition: JavascriptExample.C:88
Popup::show
JSlot show
Show the dialog.
Definition: Popup.h:70
JavascriptExample::currentAmount_
WText * currentAmount_
WText for showing the current amount.
Definition: JavascriptExample.h:50
Wt::WInteractWidget::clicked
EventSignal< WMouseEvent > & clicked()
Wt::WApplication::setTitle
void setTitle(const WString &title)
Wt::JSignal::connect
Wt::Signals::connection connect(const F &function)
JavascriptExample::setAmount
void setAmount(std::string amount)
Set the amount to be payed.
Definition: JavascriptExample.C:76
Wt::WWebWidget::setMargin
virtual void setMargin(const WLength &margin, WFlags< Side > sides=All)
Popup::createPrompt
static Popup * createPrompt(const WString &message, const std::string defaultValue, WObject *parent=0)
Create a prompt dialog with the given default value.
Definition: Popup.C:82
Popup::defaultValue
const std::string & defaultValue() const
Get the default value for a prompt dialog.
Definition: Popup.h:63
Popup::okPressed
JSignal< std::string > & okPressed()
Signal emitted when ok pressed.
Definition: Popup.h:74
Wt::WApplication::root
WContainerWidget * root() const
JavascriptExample::confirmPay_
Popup * confirmPay_
Popup for paying.
Definition: JavascriptExample.h:46
Wt::WApplication::WApplication
WApplication(const WEnvironment &environment)

Member Function Documentation

void JavascriptExample::confirmed ( )
private

The user has confirmed the payment.

Definition at line 88 of file JavascriptExample.C.

89 {
90  new WText("<br/>Just payed $" + promptAmount_->defaultValue() + ".", root());
91 }
JavascriptExample::promptAmount_
Popup * promptAmount_
Popup for changing the amount.
Definition: JavascriptExample.h:42
Popup::defaultValue
const std::string & defaultValue() const
Get the default value for a prompt dialog.
Definition: Popup.h:63
Wt::WApplication::root
WContainerWidget * root() const
void JavascriptExample::setAmount ( std::string  amount)
private

Set the amount to be payed.

Definition at line 76 of file JavascriptExample.C.

77 {
78  // Change the confirmation message to include the amount.
79  confirmPay_->setMessage("Are you sure you want to pay $" + amount + " ?");
80 
81  // Change the default value for the prompt.
82  promptAmount_->setDefaultValue(amount);
83 
84  // Change the text that shows the current amount.
85  currentAmount_->setText("Current amount: $" + promptAmount_->defaultValue());
86 }
JavascriptExample::promptAmount_
Popup * promptAmount_
Popup for changing the amount.
Definition: JavascriptExample.h:42
JavascriptExample::currentAmount_
WText * currentAmount_
WText for showing the current amount.
Definition: JavascriptExample.h:50
Wt::WText::setText
bool setText(const WString &text)
Popup::setDefaultValue
void setDefaultValue(const std::string defaultValue)
Change the default value for a prompt dialog.
Definition: Popup.C:66
Popup::setMessage
void setMessage(const WString &message)
Change the message.
Definition: Popup.C:60
Popup::defaultValue
const std::string & defaultValue() const
Get the default value for a prompt dialog.
Definition: Popup.h:63
JavascriptExample::confirmPay_
Popup * confirmPay_
Popup for paying.
Definition: JavascriptExample.h:46

Member Data Documentation

Popup* JavascriptExample::confirmPay_
private

Popup for paying.

Definition at line 46 of file JavascriptExample.h.

WText* JavascriptExample::currentAmount_
private

WText for showing the current amount.

Definition at line 50 of file JavascriptExample.h.

Popup* JavascriptExample::promptAmount_
private

Popup for changing the amount.

Definition at line 42 of file JavascriptExample.h.

The documentation for this class was generated from the following files:
Generated on Mon Sep 4 2017 for the C++ Web Toolkit (Wt) by doxygen 1.8.11