#include <stdlib.h>
#include <sys/types.h>
#include <assert.h>
#include <stdint.h>
#include <string.h>
#include <stdbool.h>
#include <stdarg.h>
#include <libnsfb.h>
#include <libnsfb_plot.h>
#include <libnsfb_plot_util.h>
#include <libnsfb_event.h>
#include <libnsfb_cursor.h>
#include "utils/utils.h"
#include "utils/log.h"
#include "netsurf/browser_window.h"
#include "netsurf/plotters.h"
#include "framebuffer/gui.h"
#include "framebuffer/fbtk.h"
#include "framebuffer/image_data.h"
#include "widget.h"

Include dependency graph for fbtk.c:

Macros
#define	REGION(x, y, cx1, cx2, cy1, cy2)

#define	SWAP(a, b) do { int t; t=(a); (a)=(b); (b)=t; } while(0)

Enumerations
enum	{ POINT_LEFTOF_REGION = 1 , POINT_RIGHTOF_REGION = 2 , POINT_ABOVE_REGION = 4 , POINT_BELOW_REGION = 8 }

Functions
void	fbtk_request_redraw (fbtk_widget_t *widget)
	Indicate a widget should be redrawn. More...

int	fbtk_set_mapping (fbtk_widget_t *widget, bool map)
	Map a widget and request it is redrawn. More...

static void	swap_siblings (fbtk_widget_t *lw)
	Swap a sibling widget with the next deepest in the hierachy. More...

int	fbtk_set_zorder (fbtk_widget_t *widget, int z)
	Set the z order of a widget. More...

bool	fbtk_set_pos_and_size (fbtk_widget_t *widget, int x, int y, int width, int height)
	Change the widget's position and size. More...

void	fbtk_set_caret (fbtk_widget_t widget, bool set, int x, int y, int height, void(remove_caret)(fbtk_widget_t *widget))
	Set caret owner and position. More...

int	fbtk_destroy_widget (fbtk_widget_t *widget)
	Destroy a widget and all its descendants. More...

bool	fbtk_clip_rect (const bbox_t restrict clip, bbox_t restrict box)
	clip one bounding box to another. More...

bool	fbtk_clip_to_widget (fbtk_widget_t widget, bbox_t restrict box)
	clip a bounding box to a widgets area. More...

int	fbtk_set_ptr (fbtk_widget_t widget, fbtk_callback_info cbi)
	set pointer to bitmap in context. More...

fbtk_widget_t *	fbtk_get_root_widget (fbtk_widget_t *widget)
	find the root widget from any widget in the toolkit hierarchy. More...

int	fbtk_get_absx (fbtk_widget_t *widget)
	Get a widget's absolute horizontal screen co-ordinate. More...

int	fbtk_get_absy (fbtk_widget_t *widget)
	Get a widget's absolute vertical screen co-ordinate. More...

int	fbtk_get_height (fbtk_widget_t *widget)
	Get a widget's height. More...

int	fbtk_get_width (fbtk_widget_t *widget)
	Get a widget's width. More...

bool	fbtk_get_bbox (fbtk_widget_t widget, nsfb_bbox_t bbox)

bool	fbtk_get_caret (fbtk_widget_t widget, int x, int y, int height)
	Get a widget caret pos, if it owns caret. More...

fbtk_widget_t *	fbtk_get_widget_at (fbtk_widget_t *nwid, int x, int y)
	Obtain the widget at a point on screen. More...

fbtk_widget_t *	fbtk_widget_new (fbtk_widget_t *parent, enum fbtk_widgettype_e type, int x, int y, int width, int height)
	creates a new widget and insert it into to hierachy. More...

bool	fbtk_get_redraw_pending (fbtk_widget_t *widget)
	Determine if there are any redraws pending for a widget. More...

static int	do_redraw (nsfb_t nsfb, fbtk_widget_t widget)
	Perform a depth-first tree-walk, calling the redraw callback of the widgets in turn. More...

int	fbtk_redraw (fbtk_widget_t *widget)
	Perform any pending widget redraws. More...

fbtk_callback	fbtk_get_handler (fbtk_widget_t *widget, fbtk_callback_type cbt)
	Get a callback handler. More...

fbtk_callback	fbtk_set_handler (fbtk_widget_t widget, fbtk_callback_type cbt, fbtk_callback cb, void context)
	Set a callback handler. More...

int	fbtk_post_callback (fbtk_widget_t *widget, fbtk_callback_type cbt,...)
	Helper function to allow simple calling of callbacks with parameters. More...

void	fbtk_set_focus (fbtk_widget_t *widget)
	Give widget input focus. More...

nsfb_t *	fbtk_get_nsfb (fbtk_widget_t *widget)
	Retrieve the framebuffer library handle from toolkit widget. More...

fbtk_widget_t *	fbtk_init (nsfb_t *fb)
	Initialise widget toolkit. More...

Macro Definition Documentation

◆ REGION

#define REGION	(	x,
		y,
		cx1,
		cx2,
		cy1,
		cy2
	)

Value:

        (( (y) > (cy2) ? POINT_BELOW_REGION : 0) |      \
         ( (y) < (cy1) ? POINT_ABOVE_REGION : 0) |      \
         ( (x) > (cx2) ? POINT_RIGHTOF_REGION : 0) |    \
         ( (x) < (cx1) ? POINT_LEFTOF_REGION : 0) )

Definition at line 325 of file fbtk.c.

◆ SWAP

#define SWAP	(	a,
		b
	)	do { int t; t=(a); (a)=(b); (b)=t; } while(0)

Definition at line 332 of file fbtk.c.

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

Enumerator
POINT_LEFTOF_REGION
POINT_RIGHTOF_REGION
POINT_ABOVE_REGION
POINT_BELOW_REGION

Definition at line 317 of file fbtk.c.

Function Documentation

◆ do_redraw()

static int do_redraw	(	nsfb_t *	nsfb,
		fbtk_widget_t *	widget
	)

static

Perform a depth-first tree-walk, calling the redraw callback of the widgets in turn.

This function makes no decisions of its own and simply walks the widget tree depth first calling widgets redraw callbacks if flagged to do so. The tree search is optimised with a flag to indicate wether the children of a node should be considered.

Definition at line 630 of file fbtk.c.

References fbtk_widget_s::child, do_redraw(), fbtk, FBTK_CBT_REDRAW, fbtk_get_absx(), fbtk_get_absy(), fbtk_post_callback(), fbtk_widget_s::height, fbtk_widget_s::last_child, fbtk_widget_s::needed, nsfb, NSLOG, fbtk_widget_s::prev, fbtk_widget_s::redraw, fbtk_widget_s::width, fbtk_widget_s::x, and fbtk_widget_s::y.

Referenced by do_redraw(), and fbtk_redraw().

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◆ fbtk_clip_rect()

bool fbtk_clip_rect	(	const bbox_t *restrict	clip,
		bbox_t *restrict	box
	)

clip one bounding box to another.

Definition at line 336 of file fbtk.c.

References clip(), REGION, and SWAP.

Referenced by fbtk_clip_to_widget().

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◆ fbtk_clip_to_widget()

bool fbtk_clip_to_widget	(	fbtk_widget_t *	widget,
		bbox_t *restrict	box
	)

clip a bounding box to a widgets area.

Definition at line 379 of file fbtk.c.

References fbtk_clip_rect(), fbtk_widget_s::height, and fbtk_widget_s::width.

Referenced by fb_queue_redraw().

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◆ fbtk_destroy_widget()

int fbtk_destroy_widget ( fbtk_widget_t * widget )

Destroy a widget and all its descendants.

Removes a widget from the hierachy and frees it and all its children.

Parameters

widget The widget to destroy.

Returns: 0 on success or -1 on error.

Definition at line 282 of file fbtk.c.

References FBTK_CBT_DESTROY, fbtk_destroy_widget(), fbtk_post_callback(), fbtk_widget_s::first_child, fbtk_widget_s::next, fbtk_widget_s::parent, parent, and fbtk_widget_s::prev.

Referenced by fbtk_destroy_widget(), and gui_window_destroy().

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◆ fbtk_get_absx()

int fbtk_get_absx ( fbtk_widget_t * widget )

Get a widget's absolute horizontal screen co-ordinate.

Parameters

widget The widget to inspect.

Returns: The absolute screen co-ordinate.

Definition at line 430 of file fbtk.c.

References fbtk_widget_s::parent, and fbtk_widget_s::x.

Referenced by create_normal_browser_window(), do_redraw(), fb_cw_draw_event(), fb_pan(), fb_redraw(), fbtk_click(), and fbtk_warp_pointer().

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◆ fbtk_get_absy()

int fbtk_get_absy ( fbtk_widget_t * widget )

Get a widget's absolute vertical screen co-ordinate.

Parameters

widget The widget to inspect.

Returns: The absolute screen co-ordinate.

Definition at line 445 of file fbtk.c.

References fbtk_widget_s::parent, and fbtk_widget_s::y.

Referenced by create_normal_browser_window(), do_redraw(), fb_cw_draw_event(), fb_pan(), fb_redraw(), fbtk_click(), and fbtk_warp_pointer().

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◆ fbtk_get_bbox()

bool fbtk_get_bbox	(	fbtk_widget_t *	widget,
		nsfb_bbox_t *	bbox
	)

Definition at line 474 of file fbtk.c.

References fbtk_widget_s::height, fbtk_widget_s::parent, fbtk_widget_s::width, fbtk_widget_s::x, and fbtk_widget_s::y.

◆ fbtk_get_caret()

bool fbtk_get_caret	(	fbtk_widget_t *	widget,
		int *	x,
		int *	y,
		int *	height
	)

Get a widget caret pos, if it owns caret.

Parameters

widget	The widget to inspect.
x	If widget has caret, returns x-coord of caret within widget
y	If widget has caret, returns y-coord of caret within widget
height	If widget has caret, returns caret height

Returns: true iff widget has caret

Definition at line 494 of file fbtk.c.

References fbtk_get_root_widget(), height, and root.

Referenced by fb_redraw(), fb_redraw_text(), fb_text_input_remove_caret_cb(), fbtk_set_text(), gui_window_remove_caret(), and gui_window_remove_caret_cb().

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◆ fbtk_get_handler()

fbtk_callback fbtk_get_handler	(	fbtk_widget_t *	widget,
		fbtk_callback_type	cbt
	)

Get a callback handler.

Definition at line 681 of file fbtk.c.

References fbtk_widget_s::callback, FBTK_CBT_END, and FBTK_CBT_START.

Referenced by fbtk_click().

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◆ fbtk_get_height()

int fbtk_get_height ( fbtk_widget_t * widget )

Get a widget's height.

Parameters

widget The widget to inspect.

Returns: The widget height.

Definition at line 460 of file fbtk.c.

References fbtk_widget_s::height.

Referenced by create_normal_browser_window(), fb_browser_window_input(), fb_browser_window_redraw(), fb_corewindow_init(), fb_cw_draw_event(), fb_cw_get_window_dimensions(), fb_local_history_present(), fb_pan(), fb_window_invalidate_area(), fbtk_enable_oskb(), gui_window_get_dimensions(), gui_window_update_extent(), resize_normal_browser_window(), and widget_scroll_y().

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◆ fbtk_get_nsfb()

nsfb_t * fbtk_get_nsfb ( fbtk_widget_t * widget )

Retrieve the framebuffer library handle from toolkit widget.

Parameters

widget A fbtk widget.

Returns: The underlying framebuffer.

Definition at line 802 of file fbtk.c.

References fbtk_get_root_widget(), and root.

Referenced by fb_cw_draw_event(), fb_pan(), fb_redraw(), fb_redraw_bitmap(), fb_redraw_fill(), fb_redraw_text(), fb_redraw_window(), and gui_resize().

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◆ fbtk_get_redraw_pending()

bool fbtk_get_redraw_pending ( fbtk_widget_t * widget )

Determine if there are any redraws pending for a widget.

Mainly used by clients on the root widget to determine if they need to call fbtk_redraw

Parameters

widget to check.

Definition at line 611 of file fbtk.c.

References fbtk_get_root_widget(), and root.

Referenced by framebuffer_run().

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◆ fbtk_get_root_widget()

fbtk_widget_t * fbtk_get_root_widget ( fbtk_widget_t * widget )

find the root widget from any widget in the toolkit hierarchy.

Parameters

widget Any widget.

Returns: The root widget or NULL if widget was not valid.

Definition at line 412 of file fbtk.c.

References FB_WIDGET_TYPE_ROOT, NSLOG, fbtk_widget_s::parent, and fbtk_widget_s::type.

Referenced by fb_redraw_text(), fb_redraw_text_button(), fbtk_click(), fbtk_enable_oskb(), fbtk_event(), fbtk_get_caret(), fbtk_get_nsfb(), fbtk_get_redraw_pending(), fbtk_get_widget_at(), fbtk_input(), fbtk_redraw(), fbtk_set_caret(), fbtk_set_focus(), fbtk_set_ptr(), fbtk_tgrab_pointer(), fbtk_warp_pointer(), hscroll_redraw(), and vscroll_redraw().

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◆ fbtk_get_widget_at()

fbtk_widget_t * fbtk_get_widget_at	(	fbtk_widget_t *	widget,
		int	x,
		int	y
	)

Obtain the widget at a point on screen.

Parameters

widget	any tookit widget.
x	location in horizontal plane.
y	location in vertical plane.

Returns: widget or NULL.

Definition at line 516 of file fbtk.c.

References fbtk_get_root_widget(), fbtk_widget_s::first_child, fbtk_widget_s::height, fbtk_widget_s::mapped, fbtk_widget_s::next, fbtk_widget_s::width, fbtk_widget_s::x, and fbtk_widget_s::y.

Referenced by fbtk_click(), and fbtk_warp_pointer().

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◆ fbtk_get_width()

int fbtk_get_width ( fbtk_widget_t * widget )

Get a widget's width.

Parameters

widget The widget to inspect.

Returns: The widget width.

Definition at line 467 of file fbtk.c.

References fbtk_widget_s::width.

Referenced by create_normal_browser_window(), create_toolbar(), fb_browser_window_input(), fb_browser_window_redraw(), fb_corewindow_init(), fb_cw_draw_event(), fb_cw_get_window_dimensions(), fb_local_history_present(), fb_pan(), fb_window_invalidate_area(), fbtk_enable_oskb(), gui_window_get_dimensions(), gui_window_update_extent(), resize_normal_browser_window(), resize_toolbar(), and widget_scroll_x().

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◆ fbtk_init()

fbtk_widget_t * fbtk_init ( nsfb_t * fb )

Initialise widget toolkit.

Initialises widget toolkit against a framebuffer.

Parameters

fb	The underlying framebuffer.

Returns: The root widget handle.

Definition at line 814 of file fbtk.c.

References FB_WIDGET_TYPE_ROOT, and root.

Referenced by main().

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◆ fbtk_post_callback()

int fbtk_post_callback	(	fbtk_widget_t *	widget,
		fbtk_callback_type	cbt,
			...
	)

Helper function to allow simple calling of callbacks with parameters.

Parameters

widget	The fbtk widget to post the callback to.
cbt	The type of callback to post
...	Parameters appropriate for the callback type.

Definition at line 715 of file fbtk.c.

References fbtk_widget_s::callback, fbtk_widget_s::callback_context, fbtk_callback_info::context, fbtk_callback_info::event, FBTK_CBT_CLICK, FBTK_CBT_INPUT, FBTK_CBT_POINTERMOVE, FBTK_CBT_REDRAW, FBTK_CBT_SCROLLX, FBTK_CBT_SCROLLY, FBTK_CBT_STRIP_FOCUS, FBTK_CBT_USER, fbtk_widget_s::mapped, fbtk_callback_info::type, fbtk_callback_info::x, and fbtk_callback_info::y.

Referenced by do_redraw(), fbtk_click(), fbtk_destroy_widget(), fbtk_input(), fbtk_set_focus(), fbtk_warp_pointer(), hscroll_drag(), hscrollarea_click(), hscrolll_click(), hscrollr_click(), vscroll_drag(), vscrollarea_click(), vscrolld_click(), and vscrollu_click().

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◆ fbtk_redraw()

int fbtk_redraw ( fbtk_widget_t * widget )

Perform any pending widget redraws.

Parameters

widget A fbtk widget.

Definition at line 669 of file fbtk.c.

References do_redraw(), fbtk_get_root_widget(), and root.

Referenced by framebuffer_run().

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◆ fbtk_request_redraw()

void fbtk_request_redraw ( fbtk_widget_t * widget )

Indicate a widget should be redrawn.

Definition at line 82 of file fbtk.c.

References fbtk_widget_s::child, fbtk, fbtk_request_redraw(), fbtk_widget_s::height, fbtk_widget_s::last_child, fbtk_widget_s::mapped, fbtk_widget_s::needed, NSLOG, fbtk_widget_s::parent, fbtk_widget_s::prev, fbtk_widget_s::redraw, fbtk_widget_s::width, fbtk_widget_s::x, and fbtk_widget_s::y.

Referenced by fb_queue_redraw(), fb_text_input_remove_caret_cb(), fbtk_request_redraw(), fbtk_set_bitmap(), fbtk_set_mapping(), fbtk_set_scroll_parameters(), fbtk_set_scroll_position(), fbtk_set_text(), gui_resize(), text_input(), text_input_click(), widget_scroll_x(), and widget_scroll_y().

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◆ fbtk_set_caret()

void fbtk_set_caret	(	fbtk_widget_t *	widget,
		bool	set,
		int	x,
		int	y,
		int	height,
		void()(fbtk_widget_t widget)	remove_caret
	)

Set caret owner and position.

Parameters

widget	widget to give caret to, or ensure caret is released from
set	true: caret to be set for widget, false: caret to be released
x	x-coordinate of caret top
y	y-coordinate of caret top
height	height of caret
remove_caret	callback when caret is removed.

Definition at line 252 of file fbtk.c.

References fbtk_get_root_widget(), height, and root.

Referenced by fb_browser_window_strip_focus(), fbtk_set_text(), gui_window_place_caret(), gui_window_remove_caret(), text_input(), text_input_click(), and text_input_strip_focus().

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◆ fbtk_set_focus()

void fbtk_set_focus ( fbtk_widget_t * widget )

Give widget input focus.

Parameters

widget Widget to be given input focus.

Definition at line 781 of file fbtk.c.

References FBTK_CBT_STRIP_FOCUS, fbtk_get_root_widget(), fbtk_post_callback(), and root.

Referenced by create_normal_browser_window(), and fbtk_click().

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◆ fbtk_set_handler()

fbtk_callback fbtk_set_handler	(	fbtk_widget_t *	widget,
		fbtk_callback_type	cbt,
		fbtk_callback	cb,
		void *	pw
	)

Set a callback handler.

Set a callback handler and the pointer to pass for a widget.

Parameters

widget	The widget to set the handler for.
cbt	The type of callback to set.
cb	The callback.
pw	The private pointer to pass when calling the callback.

Returns: The previous callback handler for the type or NULL.

Definition at line 693 of file fbtk.c.

References fbtk_widget_s::callback, fbtk_widget_s::callback_context, FBTK_CBT_END, and FBTK_CBT_START.

Referenced by create_browser_widget(), create_normal_browser_window(), create_toolbar(), fb_corewindow_init(), fbtk_create_bitmap(), fbtk_create_button(), fbtk_create_fill(), fbtk_create_hscroll(), fbtk_create_text(), fbtk_create_text_button(), fbtk_create_vscroll(), fbtk_create_window(), fbtk_create_writable_text(), fbtk_writable_text(), hscrollarea_click(), and vscrollarea_click().

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◆ fbtk_set_mapping()

int fbtk_set_mapping	(	fbtk_widget_t *	widget,
		bool	map
	)

Map a widget and request it is redrawn.

Definition at line 127 of file fbtk.c.

References fbtk_request_redraw(), fbtk_widget_s::mapped, NSLOG, and fbtk_widget_s::parent.

Referenced by create_toolbar(), fb_local_history_hide(), fb_local_history_mouse(), fb_local_history_present(), gui_window_create(), map_osk(), and osk_close().

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◆ fbtk_set_pos_and_size()

bool fbtk_set_pos_and_size	(	fbtk_widget_t *	widget,
		int	x,
		int	y,
		int	width,
		int	height
	)

Change the widget's position and size.

(Doesn't redraw)

Definition at line 209 of file fbtk.c.

References fbtk_widget_s::height, height, fbtk_widget_s::parent, parent, fbtk_widget_s::width, width, fbtk_widget_s::x, and fbtk_widget_s::y.

Referenced by fbtk_reposition_hscroll(), fbtk_reposition_vscroll(), gui_resize(), resize_browser_widget(), resize_normal_browser_window(), and resize_toolbar().

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◆ fbtk_set_ptr()

int fbtk_set_ptr	(	fbtk_widget_t *	widget,
		fbtk_callback_info *	cbi
	)

set pointer to bitmap in context.

widget helper callback to set cursor image to the bitmap passed in the callbacks private data.

Definition at line 393 of file fbtk.c.

References fbtk_callback_info::context, fbtk_get_root_widget(), fbtk_bitmap::height, fbtk_bitmap::hot_x, fbtk_bitmap::hot_y, fbtk_bitmap::pixdata, root, and fbtk_bitmap::width.

Referenced by fbtk_create_button(), and fbtk_create_text_button().

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◆ fbtk_set_zorder()

int fbtk_set_zorder	(	fbtk_widget_t *	widget,
		int	z
	)

Set the z order of a widget.

Definition at line 181 of file fbtk.c.

References fbtk_widget_s::next, fbtk_widget_s::prev, and swap_siblings().

Referenced by fb_local_history_present(), and map_osk().

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◆ fbtk_widget_new()

fbtk_widget_t * fbtk_widget_new	(	fbtk_widget_t *	parent,
		enum fbtk_widgettype_e	type,
		int	x,
		int	y,
		int	width,
		int	height
	)

creates a new widget and insert it into to hierachy.

The widget is set to defaults of false, 0 or NULL.

Parameters

parent	The parent widget. The new widget will be added with the shallowest z order relative to its siblings.
type	The type of the widget.
x	The x co-ordinate relative to the parent widget.
y	The y co-ordinate relative to the parent widget.
width	the widgets width. This will be clipped to the parent, if the value is 0 the largest extent which can fit within the parent is used, if the value is negative the largest value that will fit within the parent less the value given will be used.
height	the widgets width. This will be clipped to the parent, if the value is 0 the largest extent which can fit within the parent is used, if the value is negative the largest value that will fit within the parent less the value given will be used.

Definition at line 546 of file fbtk.c.

References fbtk, fbtk_widget_s::height, height, fbtk_widget_s::next, NSLOG, fbtk_widget_s::parent, parent, fbtk_widget_s::prev, type, fbtk_widget_s::type, fbtk_widget_s::width, width, fbtk_widget_s::x, and fbtk_widget_s::y.

Referenced by fbtk_create_bitmap(), fbtk_create_button(), fbtk_create_fill(), fbtk_create_hscroll(), fbtk_create_text(), fbtk_create_text_button(), fbtk_create_user(), fbtk_create_vscroll(), fbtk_create_window(), and fbtk_create_writable_text().

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◆ swap_siblings()

static void swap_siblings ( fbtk_widget_t * lw )

static

Swap a sibling widget with the next deepest in the hierachy.

Parameters

lw	The widget to swap

Definition at line 146 of file fbtk.c.

References fbtk_widget_s::first_child, fbtk_widget_s::last_child, fbtk_widget_s::next, NSLOG, fbtk_widget_s::parent, and fbtk_widget_s::prev.

Referenced by fbtk_set_zorder().

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Macros

Enumerations

Functions

Macro Definition Documentation

◆ REGION

◆ SWAP

Enumeration Type Documentation

◆ anonymous enum

Function Documentation

◆ do_redraw()

◆ fbtk_clip_rect()

◆ fbtk_clip_to_widget()

◆ fbtk_destroy_widget()

◆ fbtk_get_absx()

◆ fbtk_get_absy()

◆ fbtk_get_bbox()

◆ fbtk_get_caret()

◆ fbtk_get_handler()

◆ fbtk_get_height()

◆ fbtk_get_nsfb()

◆ fbtk_get_redraw_pending()

◆ fbtk_get_root_widget()

◆ fbtk_get_widget_at()

◆ fbtk_get_width()

◆ fbtk_init()

◆ fbtk_post_callback()

◆ fbtk_redraw()

◆ fbtk_request_redraw()

◆ fbtk_set_caret()

◆ fbtk_set_focus()

◆ fbtk_set_handler()

◆ fbtk_set_mapping()

◆ fbtk_set_pos_and_size()

◆ fbtk_set_ptr()

◆ fbtk_set_zorder()

◆ fbtk_widget_new()

◆ swap_siblings()