libyui  3.3.1
YLogView Class Referenceabstract

LogView: A scrollable (output-only) text to display a growing log, very much like the "tail -f" shell command. More...

#include <YLogView.h>

Inheritance diagram for YLogView:
Collaboration diagram for YLogView:

Public Member Functions

virtual ~YLogView ()
 Destructor.
 
virtual const char * widgetClass () const
 Returns a descriptive name of this widget class for logging, debugging etc.
 
std::string label () const
 Return the label (the caption above the log text).
 
virtual void setLabel (const std::string &label)
 Set the label (the caption above the log text). More...
 
int visibleLines () const
 Return the number of visible lines.
 
void setVisibleLines (int newVisibleLines)
 Set the number of visible lines. More...
 
int maxLines () const
 Return the maximum number of lines to store. More...
 
void setMaxLines (int newMaxLines)
 Set the maximum number of lines to store. More...
 
std::string logText () const
 Return the entire log text as one large string of concatenated lines delimited with newlines.
 
void setLogText (const std::string &text)
 Set (replace) the entire log text and trigger a display update.
 
std::string lastLine () const
 Return the last log line.
 
void appendLines (const std::string &text)
 Append one or more lines to the log text and trigger a display update.
 
void clearText ()
 Clear the log text and trigger a display update.
 
int lines () const
 Return the current number of lines.
 
virtual bool setProperty (const std::string &propertyName, const YPropertyValue &val)
 Set a property. More...
 
virtual YPropertyValue getProperty (const std::string &propertyName)
 Get a property. More...
 
virtual const YPropertySetpropertySet ()
 Return this class's property set. More...
 
virtual std::string shortcutString () const
 Get the string of this widget that holds the keyboard shortcut. More...
 
virtual void setShortcutString (const std::string &str)
 Set the string of this widget that holds the keyboard shortcut. More...
 
- Public Member Functions inherited from YWidget
virtual ~YWidget ()
 Destructor.
 
virtual std::string debugLabel () const
 Returns a descriptive label of this widget instance. More...
 
std::string helpText () const
 Return the help text for this widget.
 
void setHelpText (const std::string &helpText)
 Set a help text for this widget. More...
 
bool hasChildren () const
 Returns 'true' if this widget has any children.
 
YWidgetfirstChild () const
 Returns the first child or 0 if there is none. More...
 
YWidgetlastChild () const
 Returns the last child or 0 if there is none.
 
YWidgetListIterator childrenBegin () const
 Return an iterator that points to the first child or to childrenEnd() if there are no children.
 
YWidgetListIterator childrenEnd () const
 Return an interator that points after the last child.
 
YWidgetListConstIterator childrenConstBegin () const
 Return a const iterator that points to the first child or to childrenEnd() if there are no children.
 
YWidgetListConstIterator childrenConstEnd () const
 Return a const interator that points after the last child.
 
YWidgetListIterator begin ()
 A helper for the range-based "for" loop. More...
 
YWidgetListIterator end ()
 A helper for the range-based "for" loop. More...
 
int childrenCount () const
 Returns the current number of children.
 
bool contains (YWidget *child) const
 Checks if 'child' is a (direct!) child of this widget.
 
virtual void addChild (YWidget *child)
 Add a new child. More...
 
virtual void removeChild (YWidget *child)
 Remove a child. More...
 
void deleteChildren ()
 Delete all children and remove them from the children manager's list.
 
YWidgetparent () const
 Return this widget's parent or 0 if it doesn't have a parent.
 
bool hasParent () const
 Return 'true' if this widget has a parent, 'false' if not.
 
void setParent (YWidget *newParent)
 Set this widget's parent.
 
YDialogfindDialog ()
 Traverse up the widget hierarchy and find the dialog this widget belongs to. More...
 
YWidgetfindWidget (YWidgetID *id, bool doThrow=true) const
 Recursively find a widget by its ID. More...
 
virtual int preferredWidth ()=0
 Preferred width of the widget. More...
 
virtual int preferredHeight ()=0
 Preferred height of the widget. More...
 
virtual int preferredSize (YUIDimension dim)
 Preferred size of the widget in the specified dimension. More...
 
virtual void setSize (int newWidth, int newHeight)=0
 Set the new size of the widget. More...
 
bool isValid () const
 Checks whether or not this object is valid. More...
 
bool beingDestroyed () const
 Check if this widget is in the process of being destroyed.
 
void * widgetRep () const
 Return a pointer to the underlying toolkit's (Qt, ...) widget representing this abstract UI widget.
 
void setWidgetRep (void *toolkitWidgetRep)
 Set the pointer to the underlying toolkit's (Qt, ...) widget representing this abstract UI widget. More...
 
bool hasId () const
 Returns 'true' if this widget has an ID.
 
YWidgetIDid () const
 Returns this widget's ID.
 
void setId (YWidgetID *newId_disown)
 Set this widget's ID. More...
 
virtual void setEnabled (bool enabled=true)
 Enable or disable this widget, i.e. More...
 
void setDisabled ()
 Disable this widget (overloaded for better readability).
 
virtual bool isEnabled () const
 Returns 'true' if this widget is enabled.
 
virtual bool stretchable (YUIDimension dim) const
 This is a boolean value that determines whether the widget is resizable beyond its preferred size in the specified dimension. More...
 
void setStretchable (YUIDimension dim, bool newStretch)
 Set the stretchable state to "newStretch" regardless of any hstretch or vstretch options.
 
void setDefaultStretchable (YUIDimension dim, bool newStretch)
 Set the stretchable state to "newStretch". More...
 
virtual int weight (YUIDimension dim)
 The weight is used in situations where all widgets can get their preferred size and yet space is available. More...
 
bool hasWeight (YUIDimension dim)
 Return whether or not the widget has a weight in the specified dimension.
 
void setWeight (YUIDimension dim, int weight)
 Set a weight in the specified dimension.
 
void setNotify (bool notify=true)
 Sets the Notify property.
 
bool notify () const
 Returns whether the widget will notify, i.e. More...
 
void setNotifyContextMenu (bool notifyContextMenu=true)
 Sets the notifyContextMenu property.
 
bool notifyContextMenu () const
 Returns whether the widget will send an event when the user clicks selects the context menu e.g. More...
 
bool sendKeyEvents () const
 Returns 'true' if this widget should send key events, i.e. More...
 
void setSendKeyEvents (bool doSend)
 Specify whether or not this widget should send key events.
 
bool autoShortcut () const
 Returns 'true' if a keyboard shortcut should automatically be assigned to this widget - without complaints in the log file.
 
void setAutoShortcut (bool _newAutoShortcut)
 Sets the 'autoShortcut' flag.
 
int functionKey () const
 Return a function key number that is assigned to this widget. More...
 
bool hasFunctionKey () const
 Check if a function key is assigned to this widget.
 
virtual void setFunctionKey (int fkey_no)
 Assign a function key to this widget (1 for F1, 2 for F2, etc. More...
 
virtual bool setKeyboardFocus ()
 Set the keyboard focus to this widget. More...
 
virtual const char * userInputProperty ()
 The name of the widget property that will return user input, if there is any. More...
 
void dumpWidgetTree (int indentationLevel=0)
 Debugging function: Dump the widget tree from here on to the log file.
 
void dumpDialogWidgetTree ()
 Debugging function: Dump the widget tree from this widget's dialog parent. More...
 
void setChildrenEnabled (bool enabled)
 Enable or disable all widgets in this widget tree.
 
virtual void saveUserInput (YMacroRecorder *macroRecorder)
 Recursively save the user input of all child widgets to a macro recorder: More...
 
void * operator new (size_t size)
 Overloaded operator new to ensure widgets are always created on the heap, never on the stack. More...
 
virtual void startMultipleChanges ()
 In some UIs updating the screen content is an expensive operation. More...
 
virtual void doneMultipleChanges ()
 

Protected Member Functions

 YLogView (YWidget *parent, const std::string &label, int visibleLines, int maxLines)
 Constructor. More...
 
virtual void displayLogText (const std::string &text)=0
 Display the part of the log text that should be displayed. More...
 
- Protected Member Functions inherited from YWidget
 YWidget (YWidget *parent)
 Constructor.
 
YWidgetChildrenManagerchildrenManager () const
 Returns this widget's children manager.
 
void setChildrenManager (YWidgetChildrenManager *manager)
 Sets a new children manager for this widget. More...
 
void setBeingDestroyed ()
 Set the "being destroyed" flag, i.e. More...
 
void dumpWidget (YWidget *w, int indentationLevel)
 Helper function for dumpWidgetTree(): Dump one widget to the log file.
 

Detailed Description

LogView: A scrollable (output-only) text to display a growing log, very much like the "tail -f" shell command.

Definition at line 37 of file YLogView.h.

Constructor & Destructor Documentation

◆ YLogView()

YLogView::YLogView ( YWidget parent,
const std::string &  label,
int  visibleLines,
int  maxLines 
)
protected

Constructor.

'label' is the caption above the log. 'visibleLines' indicates how many lines should be visible by default (unless changed by other layout constraints), 'maxLines' specifies how many lines (always the last ones) to keep in the log. 0 for 'maxLines' means "keep all lines".

Definition at line 58 of file YLogView.cc.

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Member Function Documentation

◆ displayLogText()

virtual void YLogView::displayLogText ( const std::string &  text)
protectedpure virtual

Display the part of the log text that should be displayed.

'text' contains the last 'visibleLines()' lines. This is called whenever the log text changes. Note that the text might also be empty, in which case the displayed log text should be cleared.

Derived classes are required to implement this.

◆ getProperty()

YPropertyValue YLogView::getProperty ( const std::string &  propertyName)
virtual

Get a property.

Reimplemented from YWidget.

This method may throw YUIPropertyExceptions.

Reimplemented from YWidget.

Definition at line 285 of file YLogView.cc.

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◆ maxLines()

int YLogView::maxLines ( ) const

Return the maximum number of lines to store.

The last maxLines() lines of the log text will be kept.

Definition at line 104 of file YLogView.cc.

◆ propertySet()

const YPropertySet & YLogView::propertySet ( )
virtual

Return this class's property set.

This also initializes the property upon the first call.

Reimplemented from YWidget.

Reimplemented from YWidget.

Definition at line 240 of file YLogView.cc.

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◆ setLabel()

void YLogView::setLabel ( const std::string &  label)
virtual

Set the label (the caption above the log text).

Derived classes are free to reimplement this, but they should call this base class method at the end of the overloaded function.

Definition at line 83 of file YLogView.cc.

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◆ setMaxLines()

void YLogView::setMaxLines ( int  newMaxLines)

Set the maximum number of lines to store.

"0" means "keep all lines" (beware of memory overflow!).

If the new value is lower than the old value, any (now) excess lines before the last 'newMaxLines' lines of the log text is cut off and a display update is triggered.

This method is intentionally not virtual since a display update is triggered when appropriate.

Definition at line 111 of file YLogView.cc.

◆ setProperty()

bool YLogView::setProperty ( const std::string &  propertyName,
const YPropertyValue val 
)
virtual

Set a property.

Reimplemented from YWidget.

This function may throw YUIPropertyExceptions.

This function returns 'true' if the value was successfully set and 'false' if that value requires special handling (not in error cases: those are covered by exceptions).

Reimplemented from YWidget.

Definition at line 266 of file YLogView.cc.

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◆ setShortcutString()

virtual void YLogView::setShortcutString ( const std::string &  str)
inlinevirtual

Set the string of this widget that holds the keyboard shortcut.

Reimplemented from YWidget.

Reimplemented from YWidget.

Definition at line 185 of file YLogView.h.

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◆ setVisibleLines()

void YLogView::setVisibleLines ( int  newVisibleLines)

Set the number of visible lines.

Changing this has only effect upon the next geometry call, so applications calling this function might want to trigger a re-layout afterwards.

This method is intentionally not virtual: visibleLines() should be queried in the preferredHeight() implementation.

Definition at line 97 of file YLogView.cc.

◆ shortcutString()

virtual std::string YLogView::shortcutString ( ) const
inlinevirtual

Get the string of this widget that holds the keyboard shortcut.

Reimplemented from YWidget.

Reimplemented from YWidget.

Definition at line 178 of file YLogView.h.

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