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The QTabBar class provides a tab bar, for use in e.g. tabbed dialogs. More...
#include <qtabbar.h>
Inherits QWidget.
| Type | Name | READ | WRITE | Options |
|---|---|---|---|---|
| Shape | shape | shape | setShape | |
| int | currentTab | currentTab | setCurrentTab | |
| int | count | count | ||
| int | keyboardFocusTab | keyboardFocusTab |
The class is quite simple; it draws the tabs in one of four shapes and emits a signal when one is selected. It can be subclassed to tailor the look and feel.
QTabBar itself support four possible shapes, described in the QTabBar::Shape documentation.
The choice of tab shape is still a matter of taste, to a large
degree. Tab dialogs (preferences and the like) invariably use RoundedAbove and nobody uses TriangularAbove. Tab controls in
windows other than dialogs almost always either RoundedBelow or
TriangularBelow. Many spreadsheets and other tab controls where
all the pages are essentially similar to use TriangularBelow,
while RoundedBelow is used mostly when the pages are different
(e.g. a multi-page tool palette). There is no strong tradition yet,
however, so use your taste and create the tradition.
The most important part of QTabBar's API is the signal selected(). It's emitted whenever the selected page changes (even at startup, when the selected page changes from 'none'). There are also a slot, setCurrentTab(), which can be used to select a page programmatically.
QTabBar creates automatic accelerator keys in the manner of QButton; e.g. if a tab's label is "&Graphics" Alt-G becomes an accelerator key for switching to that tab.
The following virtual functions may need to be reimplemented:
RoundedAbove - the normal rounded look, above the pages
RoundedBelow - the normal rounded look, below the pages
TriangularAbove - triangular tabs, above the pages (very
unusual, included for completeness)
TriangularBelow - triangular tabs, similar to those used in
e.g. the spreadsheet Excel
Constructs a new, empty tab bar.
Destroys the tab control, freeing memory used.
[virtual]Adds newTab to the tab control.
Allocates a new id, sets newTab's id, locates it just to the right of the existing tabs, inserts an accelerator if the tab's label contains the string "&p" for some value of p, adds it to the bar, and returns the newly allocated id.
Returns the number of tabs in the tab bar.
See also tab().
If a page is currently visible, returns its ID. If no page is currently visible, returns either -1 or the ID of one of the pages.
Even if the return value is not -1, you cannot assume either that the user can see the relevant page, or that the tab is enabled.
When you need to display something, the return value from this function represents the best page to display. That's all.
See also selected().
[virtual protected]Reimplemented for internal reasons; the API is not affected.
Reimplemented from QWidget.
[virtual protected]Reimplemented for internal reasons; the API is not affected.
Reimplemented from QWidget.
[virtual]Inserts newTab to the tab control.
If index is not specified, the tab is simply added. Otherwise it's inserted at the specified position.
Allocates a new id, sets newTab's id, locates it respectively, inserts an accelerator if the tab's label contains the string "&p" for some value of p, adds it to the bar, and returns the newly allocated id.
Returns TRUE if the tab with id id is enabled, or FALSE if it is disabled or there is no such tab.
See also setTabEnabled().
[virtual protected]Reimplemented for internal reasons; the API is not affected.
Reimplemented from QWidget.
If this tab control has keyboard focus, returns the ID of the tab Space will select. Otherwise, returns -1.
[virtual]Layout all existing tabs (i.e. setting their r attribute) according
to their label and their iconset.
[virtual]Reimplemented for internal reasons; the API is not affected.
Reimplemented from QWidget.
[virtual protected]Reimplemented for internal reasons; the API is not affected.
Reimplemented from QWidget.
[virtual protected]Reimplemented for internal reasons; the API is not affected.
Reimplemented from QWidget.
[virtual protected]Paint the single tab t using p. If and only if selected is TRUE, t is currently selected.
This virtual function may be reimplemented to change the look of QTabBar. If you decide to reimplement it, you may also need to reimplement sizeHint().
[virtual protected]Repaints the tab row. All the painting is done by paint(); paintEvent() only decides which tabs need painting and in what order.
See also paint().
Reimplemented from QWidget.
[virtual protected]Paints the label of tab t centered in rectangle br using painter p and draws a focus indication if has_focus is TRUE.
[virtual]Removes tab t from the tab control.
[virtual protected]Reimplemented for internal reasons; the API is not affected.
Reimplemented from QWidget.
[virtual protected]This virtual functions is called by the mouse event handlers to determine which tab is pressed. The default implementation returns a pointer to the tab whose bounding rectangle contains p, if exactly one tab's bounding rectangle contains p. It returns 0 else.
See also mousePressEvent() and mouseReleaseEvent().
[signal]QTabBar emits this signal whenever any tab is selected, whether by the program or the user. The argument id is the ID if the tab as returned by addTab().
show() is guaranteed to emit this signal, so that you can display your page in a slot connected to this signal.
[virtual slot]Raises tab and emits the selected() signal unless the tab was already current.
See also currentTab() and selected().
[virtual slot]Raises the tab with ID id and emits the selected() signal.
See also currentTab(), selected() and tab().
Sets the shape of this tab bar to s and refreshes the bar.
[virtual]Enable tab id if enable is TRUE, or disable it if enable is FALSE. If id is currently selected, setTabEnabled() makes another tab selected.
setTabEnabled() updates the display respectively if this causes a change in id's status.
See also update() and isTabEnabled().
Returns the shape of this tab bar.
See also setShape().
[virtual]Reimplemented for internal reasons; the API is not affected.
Reimplemented from QWidget.
[virtual]Reimplemented for internal reasons; the API is not affected.
Reimplemented from QWidget.
[virtual]Reimplemented for internal reasons; the API is not affected.
Reimplemented from QWidget.
[virtual protected]Reimplemented for internal reasons; the API is not affected.
Reimplemented from QWidget.
Returns a pointer to the tab with ID id, or 0 if there is no such tab.
See also count().
[protected]The list of QTab objects added.
[virtual protected]Draws the mask for this tab bar.
Reimplemented from QWidget.
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