A demonstration of the treelist. More...

#include <DemoTreeList.h>

Inheritance diagram for DemoTreeList:

[legend]

Public Member Functions
	DemoTreeList (Wt::WContainerWidget *parent)
	Create a DemoTreeList. More...

Public Member Functions inherited from Wt::WContainerWidget
	WContainerWidget ()

	~WContainerWidget ()

void	setLayout (std::unique_ptr< WLayout > layout)

Layout *	setLayout (std::unique_ptr< Layout > layout)

WLayout *	layout () const

virtual void	addWidget (std::unique_ptr< WWidget > widget)

Widget *	addWidget (std::unique_ptr< Widget > widget)

Widget *	addNew (Args &&...args)

virtual void	insertBefore (std::unique_ptr< WWidget > widget, WWidget *before)

Widget *	insertBefore (std::unique_ptr< Widget > widget, WWidget *before)

virtual void	insertWidget (int index, std::unique_ptr< WWidget > widget)

Widget *	insertWidget (int index, std::unique_ptr< Widget > widget)

Widget *	insertNew (int index, Args &&...args)

virtual std::unique_ptr< WWidget >	removeWidget (WWidget *widget) override

virtual void	clear ()

virtual int	indexOf (WWidget *widget) const

virtual WWidget *	widget (int index) const

virtual int	count () const

void	setContentAlignment (WFlags< AlignmentFlag > contentAlignment)

void	setPadding (const WLength &padding, WFlags< Side > sides=AllSides)

WLength	padding (Side side) const

WFlags< AlignmentFlag >	contentAlignment () const

void	setOverflow (Overflow overflow, WFlags< Orientation > orientation=(Orientation::Horizontal\|Orientation::Vertical))

void	setList (bool list, bool ordered=false)

bool	isList () const

bool	isUnorderedList () const

bool	isOrderedList () const

EventSignal< WScrollEvent > &	scrolled ()

int	scrollTop () const

int	scrollLeft () const

Public Member Functions inherited from Wt::WInteractWidget
	WInteractWidget ()

EventSignal< WKeyEvent > &	keyWentDown ()

EventSignal< WKeyEvent > &	keyPressed ()

EventSignal< WKeyEvent > &	keyWentUp ()

EventSignal &	enterPressed ()

EventSignal &	escapePressed ()

EventSignal< WMouseEvent > &	clicked ()

EventSignal< WMouseEvent > &	doubleClicked ()

EventSignal< WMouseEvent > &	mouseWentDown ()

EventSignal< WMouseEvent > &	mouseWentUp ()

EventSignal< WMouseEvent > &	mouseWentOut ()

EventSignal< WMouseEvent > &	mouseWentOver ()

EventSignal< WMouseEvent > &	mouseMoved ()

EventSignal< WMouseEvent > &	mouseDragged ()

EventSignal< WMouseEvent > &	mouseWheel ()

EventSignal< WTouchEvent > &	touchStarted ()

EventSignal< WTouchEvent > &	touchEnded ()

EventSignal< WTouchEvent > &	touchMoved ()

EventSignal< WGestureEvent > &	gestureStarted ()

EventSignal< WGestureEvent > &	gestureChanged ()

EventSignal< WGestureEvent > &	gestureEnded ()

void	setDraggable (const std::string &mimeType, WWidget dragWidget=nullptr, bool isDragWidgetOnly=false, WObject sourceWidget=nullptr)

void	unsetDraggable ()

void	setMouseOverDelay (int delay)

int	mouseOverDelay () const

virtual void	setPopup (bool popup) override

virtual void	load () override

virtual bool	isEnabled () const override

Public Member Functions inherited from Wt::WWebWidget
	WWebWidget ()

virtual std::vector< WWidget *>	children () const override

Signal &	childrenChanged ()

virtual void	setPositionScheme (PositionScheme scheme) override

virtual PositionScheme	positionScheme () const override

virtual void	setOffsets (const WLength &offset, WFlags< Side > sides=AllSides) override

virtual WLength	offset (Side s) const override

virtual void	resize (const WLength &width, const WLength &height) override

virtual WLength	width () const override

virtual WLength	height () const override

virtual void	setMinimumSize (const WLength &width, const WLength &height) override

virtual WLength	minimumWidth () const override

virtual WLength	minimumHeight () const override

virtual void	setMaximumSize (const WLength &width, const WLength &height) override

virtual WLength	maximumWidth () const override

virtual WLength	maximumHeight () const override

virtual void	setLineHeight (const WLength &height) override

virtual WLength	lineHeight () const override

virtual void	setFloatSide (Side s) override

virtual Side	floatSide () const override

virtual void	setClearSides (WFlags< Side > sides) override

virtual WFlags< Side >	clearSides () const override

virtual void	setMargin (const WLength &margin, WFlags< Side > sides=AllSides) override

virtual WLength	margin (Side side) const override

virtual void	setHiddenKeepsGeometry (bool enabled) override

virtual bool	hiddenKeepsGeometry () const override

virtual void	setHidden (bool hidden, const WAnimation &animation=WAnimation()) override

virtual bool	isHidden () const override

virtual bool	isVisible () const override

virtual void	setDisabled (bool disabled) override

virtual bool	isDisabled () const override

virtual bool	isPopup () const override

virtual void	setInline (bool isInline) override

virtual bool	isInline () const override

virtual void	setDecorationStyle (const WCssDecorationStyle &style) override

virtual WCssDecorationStyle &	decorationStyle () override

virtual void	setStyleClass (const WString &styleClass) override

virtual WString	styleClass () const override

virtual void	addStyleClass (const WString &styleClass, bool force=false) override

virtual void	removeStyleClass (const WString &styleClass, bool force=false) override

virtual bool	hasStyleClass (const WString &styleClass) const override

virtual void	setVerticalAlignment (AlignmentFlag alignment, const WLength &length=WLength()) override

virtual AlignmentFlag	verticalAlignment () const override

virtual WLength	verticalAlignmentLength () const override

virtual void	setToolTip (const WString &text, TextFormat textFormat=TextFormat::Plain) override

virtual void	setDeferredToolTip (bool enable, TextFormat textFormat=TextFormat::Plain) override

virtual WString	toolTip () const override

virtual void	refresh () override

virtual void	setAttributeValue (const std::string &name, const WString &value) override

virtual WString	attributeValue (const std::string &name) const override

virtual void	setJavaScriptMember (const std::string &name, const std::string &value) override

virtual std::string	javaScriptMember (const std::string &name) const override

virtual void	callJavaScriptMember (const std::string &name, const std::string &args) override

virtual bool	loaded () const override

virtual void	setId (const std::string &id) override

virtual WWidget *	find (const std::string &name) override

virtual WWidget *	findById (const std::string &id) override

virtual void	setSelectable (bool selectable) override

virtual void	doJavaScript (const std::string &javascript) override

virtual const std::string	id () const override

void	setLoadLaterWhenInvisible (bool)

std::string	htmlTagName () const

void	setHtmlTagName (const std::string &tag)

virtual void	setCanReceiveFocus (bool enabled) override

virtual bool	canReceiveFocus () const override

virtual bool	setFirstFocus () override

virtual void	setFocus (bool focus) override

virtual bool	hasFocus () const override

virtual void	setTabIndex (int index) override

virtual int	tabIndex () const override

EventSignal &	blurred ()

EventSignal &	focussed ()

virtual bool	scrollVisibilityEnabled () const final override

virtual void	setScrollVisibilityEnabled (bool enabled) final override

virtual int	scrollVisibilityMargin () const final override

virtual void	setScrollVisibilityMargin (int margin) final override

virtual Signal< bool > &	scrollVisibilityChanged () final override

virtual bool	isScrollVisible () const final override

virtual void	setThemeStyleEnabled (bool enabled) final override

virtual bool	isThemeStyleEnabled () const final override

virtual void	setObjectName (const std::string &name) override

Public Member Functions inherited from Wt::WWidget
virtual	~WWidget ()

WWidget *	parent () const

std::unique_ptr< Widget >	removeWidget (Widget *widget)

std::unique_ptr< WWidget >	removeFromParent ()

void	setWidth (const WLength &width)

void	setHeight (const WLength &height)

virtual void	positionAt (const WWidget *widget, Orientation orientation=Orientation::Vertical)

virtual void	toggleStyleClass (const WString &styleClass, bool add, bool force=false)

std::string	jsRef () const

void	setFocus ()

virtual void	acceptDrops (const std::string &mimeType, const WString &hoverStyleClass=WString())

virtual void	stopAcceptDrops (const std::string &mimeType)

virtual void	htmlText (std::ostream &out)

bool	isRendered () const

void	hide ()

void	animateHide (const WAnimation &animation)

void	show ()

void	animateShow (const WAnimation &animation)

void	enable ()

void	disable ()

bool	layoutSizeAware () const

Public Member Functions inherited from Wt::WObject
void	addChild (std::unique_ptr< WObject > child)

Child *	addChild (std::unique_ptr< Child > child)

std::unique_ptr< WObject >	removeChild (WObject *child)

std::unique_ptr< Child >	removeChild (Child *child)

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)

Public Member Functions inherited from Wt::Core::observable
	observable () noexcept

virtual	~observable ()

auto	bindSafe (void(C::*method)(Args...)) noexcept

auto	bindSafe (void(C::*method)(Args...) const) const noexcept

auto	bindSafe (const Function &function) noexcept

Private Member Functions
void	addMap ()
	Add a map. More...

void	removeMap ()
	Remove a map. More...

TreeNode *	makeTreeMap (const std::string name, TreeNode *parent)
	Create a "map" node, and insert in the given parent. More...

TreeNode *	makeTreeFile (const std::string name, TreeNode *parent)
	Create a "file" node, and insert in the given parent. More...

Private Attributes
TreeNode *	tree_

TreeNode *	testMap_

int	testCount_

Wt::WPushButton *	addMapButton_

Wt::WPushButton *	removeMapButton_

Additional Inherited Members
Public Types inherited from Wt::WObject
typedef void(WObject::*	Method) ()

Static Public Member Functions inherited from Wt::WWebWidget
static std::string	jsStringLiteral (const std::string &v, char delimiter='\'')

Static Public Member Functions inherited from Wt::WWidget
static WString	tr (const char *key)

Protected Member Functions inherited from Wt::WInteractWidget
virtual void	propagateSetEnabled (bool enabled) override

Protected Member Functions inherited from Wt::WWebWidget
virtual void	enableAjax () override

virtual WStatelessSlot *	getStateless (Method method) override

virtual void	render (WFlags< RenderFlag > flags) override

Protected Member Functions inherited from Wt::WWidget
void	setLayoutSizeAware (bool sizeAware)

virtual void	layoutSizeChanged (int width, int height)

	WWidget ()

virtual void	dropEvent (WDropEvent dropEvent)

virtual int	boxPadding (Orientation orientation) const

virtual int	boxBorder (Orientation orientation) const

void	scheduleRender (WFlags< RepaintFlag > flags=None)

Detailed Description

A demonstration of the treelist.

This is the main class for the treelist example.

Definition at line 27 of file DemoTreeList.h.

Constructor & Destructor Documentation

◆ DemoTreeList()

DemoTreeList::DemoTreeList ( Wt::WContainerWidget * parent )

Create a DemoTreeList.

Definition at line 20 of file DemoTreeList.C.

   : WContainerWidget(parent),
     testCount_(0)
 {
   addWidget
     (new WText("<h2>Wt Tree List example</h2>"
                "<p>This is a simple demo of a treelist, implemented using"
                " <a href='http://witty.sourceforge.net/'>Wt</a>.</p>"
                "<p>The leafs of the tree contain the source code of the "
                "tree-list in the classes <b>TreeNode</b> and "
                "<b>IconPair</b>, as well as the implementation of this "
                "demo itself in the class <b>DemoTreeList</b>.</p>"));
 
   tree_ = makeTreeMap("Examples", 0);
   addWidget(tree_);
 
   TreeNode *treelist = makeTreeMap("Tree List", tree_);
   TreeNode *wstateicon = makeTreeMap("class IconPair", treelist);
   makeTreeFile("<a href=\"IconPair.h\">IconPair.h</a>", wstateicon);
   makeTreeFile("<a href=\"IconPair.C\">IconPair.C</a>", wstateicon);
   TreeNode *wtreenode = makeTreeMap("class TreeNode", treelist);
   makeTreeFile("<a href=\"TreeNode.h\">TreeNode.h</a>", wtreenode);
   makeTreeFile("<a href=\"TreeNode.C\">TreeNode.C</a>", wtreenode);
   TreeNode *demotreelist = makeTreeMap("class DemoTreeList", treelist);
   makeTreeFile("<a href=\"DemoTreeList.h\">DemoTreeList.h</a>", demotreelist);
   makeTreeFile("<a href=\"DemoTreeList.C\">DemoTreeList.C</a>", demotreelist);
 
   testMap_ = makeTreeMap("Test map", tree_);
 
   /*
    * Buttons to dynamically demonstrate changing the tree contents.
    */
   addWidget
     (new WText("<p>Use the following buttons to change the tree "
                "contents:</p>"));
 
   addMapButton_
     = new WPushButton("Add map", this);
   addMapButton_->clicked().connect(this, &DemoTreeList::addMap);
 
   removeMapButton_
     = new WPushButton("Remove map", this);
   removeMapButton_->clicked().connect(this, &DemoTreeList::removeMap);
   removeMapButton_->disable();
 
   addWidget
     (new WText("<p>Remarks:"
                "<ul>"
                "<li><p>This is not the instantiation of a pre-defined "
                "tree list component, but the full implementation of such "
                "a component, in about 350 lines of C++ code !</p> "
                "<p>In comparison, the <a href='http://myfaces.apache.org'> "
                "Apache MyFaces</a> JSF implementation of tree2, with similar "
                "functionality, uses about 2400 lines of Java, and 140 lines "
                "of JavaScript code.</p></li>"
                "<li><p>Once loaded, the tree list does not require any "
                "interaction with the server for handling the click events on "
                "the <img src='icons/nav-plus-line-middle.gif' /> and "
                "<img src='icons/nav-minus-line-middle.gif' /> icons, "
                "because these events have been connected to slots using "
                "STATIC connections. Such connections are converted to the "
                "appropriate JavaScript code that is inserted into the page. "
                "Still, the events are signaled to the server to update the "
                "application state.</p></li>"
                "<li><p>In contrast, the buttons for manipulating the tree "
                "contents use DYNAMIC connections, and thus the update "
                "is computed at server-side, and communicated back to the "
                "browser (by default using AJAX).</p></li>"
                "<li><p>When loading a page, only visible widgets (that are not "
                "<b>setHidden(true)</b>) are transmitted. "
                "The remaining widgets are loaded in the background after "
                "rendering the page. "
                "As a result the application is loaded as fast as possible.</p>"
                "</li>"
                "<li><p>The browser reload button is supported and behaves as "
                "expected: the page is reloaded from the server. Again, "
                "only visible widgets are transmitted immediately.</p> "
                "<p>(For the curious, this is the way to see the actual "
                "HTML/JavaScript code !)</p></li>"
                "</ul></p>"));
 }

Member Function Documentation

◆ addMap()

void DemoTreeList::addMap ( )

private

Add a map.

Definition at line 102 of file DemoTreeList.C.

 {
   TreeNode *node
     = makeTreeMap("Map " + boost::lexical_cast<std::string>(++testCount_),
                   testMap_);
   makeTreeFile("File " + boost::lexical_cast<std::string>(testCount_),
                node);
 
   removeMapButton_->enable();
 }

◆ makeTreeFile()

TreeNode * DemoTreeList::makeTreeFile	(	const std::string	name,
		TreeNode *	parent
	)

private

Create a "file" node, and insert in the given parent.

Definition at line 143 of file DemoTreeList.C.

 {
   IconPair *labelIcon
     = new IconPair("icons/document.png", "icons/yellow-folder-open.png",
                    false);
 
   TreeNode *node = new TreeNode(name, XHTMLText, labelIcon, 0);
   if (parent)
     parent->addChildNode(node);
 
   return node;
 }

◆ makeTreeMap()

TreeNode * DemoTreeList::makeTreeMap	(	const std::string	name,
		TreeNode *	parent
	)

private

Create a "map" node, and insert in the given parent.

Definition at line 129 of file DemoTreeList.C.

 {
   IconPair *labelIcon
     = new IconPair("icons/yellow-folder-closed.png",
                    "icons/yellow-folder-open.png",
                    false);
 
   TreeNode *node = new TreeNode(name, PlainText, labelIcon, 0);
   if (parent)
     parent->addChildNode(node);
 
   return node;
 }

◆ removeMap()

void DemoTreeList::removeMap ( )

private

Remove a map.

Definition at line 113 of file DemoTreeList.C.

 {
   int numMaps = testMap_->childNodes().size();
 
   if (numMaps > 0) {
     int c = rand() % numMaps;
 
     TreeNode *child = testMap_->childNodes()[c];
     testMap_->removeChildNode(child);
     delete child;
 
     if (numMaps == 1)
       removeMapButton_->disable();
   }
 }

Member Data Documentation

◆ addMapButton_

Wt::WPushButton* DemoTreeList::addMapButton_

private

Definition at line 39 of file DemoTreeList.h.

◆ removeMapButton_

Wt::WPushButton* DemoTreeList::removeMapButton_

private

Definition at line 40 of file DemoTreeList.h.

◆ testCount_

int DemoTreeList::testCount_

private

Definition at line 37 of file DemoTreeList.h.

◆ testMap_

TreeNode* DemoTreeList::testMap_

private

Definition at line 36 of file DemoTreeList.h.

◆ tree_

TreeNode* DemoTreeList::tree_

private

Definition at line 35 of file DemoTreeList.h.

The documentation for this class was generated from the following files:

/home/roel/project/wt/public-git/wt/examples/treelist/DemoTreeList.h
/home/roel/project/wt/public-git/wt/examples/treelist/DemoTreeList.C

Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ DemoTreeList()

Member Function Documentation

◆ addMap()

◆ makeTreeFile()

◆ makeTreeMap()

◆ removeMap()

Member Data Documentation

◆ addMapButton_

◆ removeMapButton_

◆ testCount_

◆ testMap_

◆ tree_