#include "stage/workspace/ui-style.hpp"

Description

Manage global concerns regarding a coherent user interface.

Offers access to some global UI resources, and establishes further global services to create workspace windows, to bind menu / command actions and to enter the top-level model parts.

Definition at line 72 of file ui-style.hpp.

Public Member Functions
	UiStyle ()
	Set up a coherent theming and styling for the application. More...

void	prepareStyleContext (timeline::TimelineWidget const &)
	Use the existing TimelineWidget's GTK-WidgetPath to establish a systematic CSS styling context, which can be used for theming and styling of Lumiera's custom UI elements within the timeline display. More...

void	setTheme (string const &stylesheetName)
	Sets the theme to use for the Lumiera GUI. More...

Static Public Member Functions
static Cairo::RefPtr< Cairo::SolidPattern >	readStyleColourProperty (Gtk::Widget &widget, const gchar *property_name, guint16 red, guint16 green, guint16 blue)
	A utility function which reads a colour style from the GTK Style. More...

Static Public Attributes
static Gtk::IconSize	GiantIconSize = Gtk::ICON_SIZE_INVALID
	The registered icon size for giant 48x48 px icons. More...

static Gtk::IconSize	MenuIconSize = Gtk::ICON_SIZE_INVALID
	The registered icon size for giant 16x16 px icons. More...

Private Member Functions
bool	addNonThemeIconSource (Glib::RefPtr< Gtk::IconSet > const &icon_set, cuString &base_dir, cuString &icon_name, Gtk::IconSize size, bool wildcard)
	Loads an icon from a non theme set. More...

bool	addStockIcon (Glib::RefPtr< Gtk::IconSet > const &icon_set, cuString &icon_name, Gtk::IconSize size, bool wildcard)
	Loads an icon, searching standard icon locations, and adds it to an icon set. More...

bool	addStockIconFromPath (string path, Glib::RefPtr< Gtk::IconSet > const &icon_set, Gtk::IconSize size, bool wildcard)
	Loads an icon from a specific path and adds it to an icon set. More...

bool	addStockIconSet (Glib::RefPtr< Gtk::IconFactory > const &factory, Literal iconName, Literal id, Literal label)
	Adds an icon (in different sizes) to the icon factory. More...

bool	addThemeIconSource (Glib::RefPtr< Gtk::IconSet > const &icon_set, cuString &icon_name, Gtk::IconSize size, bool wildcard)
	Loads an icon from a the icon theme. More...

void	registerAppIconSizes ()

void	registerStockItems ()
	Registers application stock items: icons and labels associated with IDs.

Private Member Functions inherited from NonCopyable
	NonCopyable (NonCopyable const &)=delete

NonCopyable &	operator= (NonCopyable const &)=delete

Private Attributes
string	iconSearchPath_

string	resourceSerachPath_

StyleAdvice	styleAdviceTrackBody_

StyleAdvice	styleAdviceTrackRuler_

Constructor & Destructor Documentation

◆ UiStyle()

UiStyle ( )

Set up a coherent theming and styling for the application.

Based on the Gtk::UIManager, the UiStyle service allows to access some style related resources, but mostly its task is to configure the GTK toolkit appropriately during startup.

Initialise the theme and style related global properties of the UI. Register the icon configuration and sizes and lookup all standard icons – either from the default theme of via the given Lumiera icon search paths, typically from setup.ini.

See also: lumiera::Config

Definition at line 68 of file ui-style.cpp.

References Config::get(), UiStyle::registerStockItems(), and UiStyle::setTheme().

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Member Function Documentation

◆ setTheme()

void setTheme ( string const & stylesheetName )

Sets the theme to use for the Lumiera GUI.

Parameters

stylesheetName GTK CSS stylesheet to load from the resourceSearchPath_

Exceptions

error::Config if this stylesheet can't be resolved on the searchpath

See also: lumiera::Config

Definition at line 86 of file ui-style.cpp.

References cStr(), and lib::resolveModulePath().

Referenced by UiStyle::UiStyle().

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◆ prepareStyleContext()

void prepareStyleContext ( timeline::TimelineWidget const & timeline )

Use the existing TimelineWidget's GTK-WidgetPath to establish a systematic CSS styling context, which can be used for theming and styling of Lumiera's custom UI elements within the timeline display.

Especially, this allows us to anchor those custom elements at a dedicated point in the hierarchy, the way it is visible for CSS selectors. Thus, either standard CSS rules and inheritance take effect on our custom elements, or the GTK stylesheet may add dedicated style rules for elements within the timeline display, most notably the system of nested scopes in the track fork and the display of clips and overlays.

Especially the following selector path can be used

paned.timeline__page > timeline__body > fork.timeline__fork

Remarks

some implementation notes....

GTK defines for each widget a widget path, to describe the path of widget parent relationships down from the top-level window
this Gtk::WidgetPath is then used to match against CSS selectors of the GTK stylesheet, either the global system theme, or (with precedence) an application stylesheet (lumiera.css)
but the Gtk::StyleContext can (and should) also be used outside of the core GTK framework to carry out custom drawing tasks, which allows custom drawing to "blend in" with the desktop theme.
to support this usage, we construct a "virtual widget" and place it at a systematically correct position in the widget hierarchy, causing the corresponding style context to pick up the appropriate standard CSS definitions in effect at that point in the hierarchy. Moreover, users may (and shall) add custom styling rules in a way to match and affect this "virtual" CSS node.
the resulting Gtk::StyleContext is constructed only once, at initialisation. It is used from drawing code "deep down" within the TimelineWidget's implementation. The Advice System allows to pass such information without the need of a direct relation between provider and consumer.
for technical reference how to manage and populate GTK WidgetPath nodes, see the implementation of the C-function gtk_widget_path_append_for_widget() in in GTK 3.x, gtkwidget.c, line 16413

Definition at line 126 of file ui-style.cpp.

◆ readStyleColourProperty()

Cairo::RefPtr< Cairo::SolidPattern > readStyleColourProperty	(	Gtk::Widget &	widget,
		const gchar *	property_name,
		guint16	red,
		guint16	green,
		guint16	blue
	)

static

A utility function which reads a colour style from the GTK Style.

Parameters

widget	The widget to load the style out of.
property_name	The name of the style property to load.
red	The fallback red intensity.
green	The fallback green intensity.
blue	The fallback blue intensity.

Returns: The loaded colour.

Definition at line 158 of file ui-style.cpp.

◆ addStockIconSet()

bool addStockIconSet	(	Glib::RefPtr< Gtk::IconFactory > const &	factory,
		Literal	iconName,
		Literal	id,
		Literal	label
	)

private

Adds an icon (in different sizes) to the icon factory.

Parameters

factory	The factory to add the icon to.
icon_name	The file name of the icon to add.
id	The id name of the icon.
label	The user readable icon name for this icon.

Returns: true if the icon was successfully loaded, returns false otherwise.

Definition at line 233 of file ui-style.cpp.

References UiStyle::addStockIcon(), UiStyle::GiantIconSize, and UiStyle::MenuIconSize.

Referenced by UiStyle::registerStockItems().

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◆ addStockIcon()

bool addStockIcon	(	Glib::RefPtr< Gtk::IconSet > const &	icon_set,
		cuString &	icon_name,
		Gtk::IconSize	size,
		bool	wildcard
	)

private

Loads an icon, searching standard icon locations, and adds it to an icon set.

Parameters

icon_set	The icon set to add the icon to.
icon_name	The file name of the icon to load.
size	The size of the icon to load.
wildcard	`true` if this icon is to be wildcarded.

Returns: true if the icon was loaded successfully.

Definition at line 266 of file ui-style.cpp.

References UiStyle::addNonThemeIconSource(), and UiStyle::addThemeIconSource().

Referenced by UiStyle::addStockIconSet().

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◆ addThemeIconSource()

bool addThemeIconSource	(	Glib::RefPtr< Gtk::IconSet > const &	icon_set,
		cuString &	icon_name,
		Gtk::IconSize	size,
		bool	wildcard
	)

private

Loads an icon from a the icon theme.

Parameters

icon_set	The icon set to add the icon to.
icon_name	The name of the icon to load.
size	The size of the icon to load.
wildcard	`true` if this icon is to be wildcarded.

Returns: true if the icon was loaded successfully.

Definition at line 290 of file ui-style.cpp.

References UiStyle::addStockIconFromPath().

Referenced by UiStyle::addStockIcon().

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◆ addNonThemeIconSource()

bool addNonThemeIconSource	(	Glib::RefPtr< Gtk::IconSet > const &	icon_set,
		cuString &	base_dir,
		cuString &	icon_name,
		Gtk::IconSize	size,
		bool	wildcard
	)

private

Loads an icon from a non theme set.

Parameters

icon_set	The icon set to add the icon to.
base_dir	The root icons directory to load from.
icon_name	The file name of the icon to load.
size	The size of the icon to load.
wildcard	`true` if this icon is to be wildcarded.

Returns: true if the icon was loaded successfully.

Definition at line 316 of file ui-style.cpp.

References UiStyle::addStockIconFromPath().

Referenced by UiStyle::addStockIcon().

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◆ addStockIconFromPath()

bool addStockIconFromPath	(	string	path,
		Glib::RefPtr< Gtk::IconSet > const &	icon_set,
		Gtk::IconSize	size,
		bool	wildcard
	)

private

Loads an icon from a specific path and adds it to an icon set.

Parameters

path	The path to load from.
icon_set	The icon set to add the icon to.
size	The size of the icon to load.
wildcard	`true` if this icon is to be wildcarded.

Returns: true if the icon was loaded successfully.

Definition at line 336 of file ui-style.cpp.

Referenced by UiStyle::addNonThemeIconSource(), and UiStyle::addThemeIconSource().

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Member Data Documentation

◆ GiantIconSize

IconSize GiantIconSize = Gtk::ICON_SIZE_INVALID

static

The registered icon size for giant 48x48 px icons.

Remarks: This value is set to BuiltinIconSize::ICON_SIZE_INVALID until register_giant_icon_size is called.

Definition at line 89 of file ui-style.hpp.

Referenced by UiStyle::addStockIconSet().

◆ MenuIconSize

IconSize MenuIconSize = Gtk::ICON_SIZE_INVALID

static

The registered icon size for giant 16x16 px icons.

Remarks: This value is set to BuiltinIconSize::ICON_SIZE_INVALID until register_app_icon_sizes is called.

Definition at line 95 of file ui-style.hpp.

Referenced by UiStyle::addStockIconSet().

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

Description

Public Member Functions

Static Public Member Functions

Static Public Attributes

Private Member Functions

Private Attributes

Constructor & Destructor Documentation

◆ UiStyle()

Member Function Documentation

◆ setTheme()

◆ prepareStyleContext()

◆ readStyleColourProperty()

◆ addStockIconSet()

◆ addStockIcon()

◆ addThemeIconSource()

◆ addNonThemeIconSource()

◆ addStockIconFromPath()

Member Data Documentation

◆ GiantIconSize

◆ MenuIconSize