stage::widget::anonymous_namespace{element-box-widget.cpp} Namespace Reference

Functions
void	initIconSizeHeuristic (Gtk::Widget const &icon)
template<class FUN >
bool	maybeShow (Gtk::Button &icon, int w, int h, FUN &reCheck)
	attempt to use available space to show more content More...
template<class FUN >
bool	maybeShow (Gtk::Label &label, int w, int h, FUN &reCheck)
int	queryNaturalHeight (Gtk::Widget const &widget)
void	queryNaturalSize (Gtk::Widget const &widget, Gtk::Requisition &natSize)
	Helper to retrieve what GTK effectively uses as minimal extension of a widget. More...
int	queryNaturalWidth (Gtk::Widget const &widget)
int	reduce (Gtk::Button &icon)
	attempt to reduce space consumption More...
int	reduce (Gtk::Label &label, int goal)

Variables
const double	HYSTERESIS = 1.6
	excess factor used to prevent "layout flickering" More...
Gtk::Requisition	ICON_SIZ {}
	point of reference for layout computations

Function Documentation

queryNaturalSize()

void stage::widget::anonymous_namespace{element-box-widget.cpp}::queryNaturalSize ( Gtk::Widget const &  widget, Gtk::Requisition &  natSize  )

inline

Helper to retrieve what GTK effectively uses as minimal extension of a widget.

Remarks

in fact this is the so called "preferred natural size", since GTK always allocates at least this amount of screen extension. Judging from the GTK 3.24 code (as of 9/2022), the minimal size setting and the "size_request" are in most cases just used for consistency checks, while the natural size is determined in accordance to the layout preference (height-for-width or width-for-hight) and then only ever increased to fit further CSS settings (border, margin) and to handle fill-layout.

Warning

however note that Gtk::Layout (which we use as foundation for our Timeline canvas) indeed starts its calculation from the minimal width of the attached child widget. Thus, as far as implementing the VFuncs, both cases should be treated symmetrically.

Definition at line 79 of file element-box-widget.cpp.

reduce() [1/2]

int stage::widget::anonymous_namespace{element-box-widget.cpp}::reduce ( Gtk::Button &  icon )

inline

attempt to reduce space consumption

Returns

achieved width reduction in pixels

Definition at line 356 of file element-box-widget.cpp.

Referenced by IterExplorer< SRC >::count(), TestChainLoad< maxFan >::getHash(), IterExplorer< SRC >::resultSum(), and IterExplorer_test::verify_reduceVal().

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reduce() [2/2]

int stage::widget::anonymous_namespace{element-box-widget.cpp}::reduce ( Gtk::Label &  label, int  goal  )

inline

Todo:

10/22 also attempt to shorten the label... ///////////////////TICKET #1242 : adjust size of the ID caption

Definition at line 369 of file element-box-widget.cpp.

maybeShow()

bool stage::widget::anonymous_namespace{element-box-widget.cpp}::maybeShow ( Gtk::Button &  icon, int  w, int  h, FUN &  reCheck  )

inline

attempt to use available space to show more content

Parameters

icon	widget to possibly expand
w	additional width available
h	vertical headroom available
reCheck	function to update and verify success

Returns

if hidden content could successfully be expanded

Definition at line 397 of file element-box-widget.cpp.

Variable Documentation

HYSTERESIS

const double HYSTERESIS = 1.6

excess factor used to prevent "layout flickering"

Remarks

once hidden, an element will only be re-shown when some excess headroom is available

Definition at line 107 of file element-box-widget.cpp.