@ -8,6 +8,7 @@ local LineWidget = require("ui/widget/linewidget")
local Math = require ( " optmath " )
local OverlapGroup = require ( " ui/widget/overlapgroup " )
local Size = require ( " ui/size " )
local TextBoxWidget = require ( " ui/widget/textboxwidget " )
local TextWidget = require ( " ui/widget/textwidget " )
local UIManager = require ( " ui/uimanager " )
local VerticalGroup = require ( " ui/widget/verticalgroup " )
@ -17,14 +18,21 @@ local Screen = Device.screen
local TitleBar = OverlapGroup : extend {
width = nil , -- default to screen width
fullscreen = false , -- larger font and small adjustments if fullscreen
align = " center " ,
align = " center " , -- title & subtitle alignment inside TitleBar
with_bottom_line = false ,
bottom_line_color = nil , -- default to black
bottom_line_h_padding = nil , -- default to 0: full width
title = " " ,
subtitle = nil ,
title_face = nil , -- if not provided, one of these will be used:
title_face_fullscreen = Font : getFace ( " smalltfont " ) ,
title_face_not_fullscreen = Font : getFace ( " x_smalltfont " ) ,
-- by default: single line, truncated if overflow -- the default could be made dependant on self.fullscreen
title_multilines = false , -- multilines if overflow
title_shrink_font_to_fit = false , -- reduce font size so that single line text fits
subtitle = nil ,
subtitle_face = Font : getFace ( " xx_smallinfofont " ) ,
title_top_padding = nil , -- computed if none provided
@ -46,12 +54,23 @@ local TitleBar = OverlapGroup:extend{
-- If provided, use right_icon="exit" and use this as right_icon_tap_callback
close_callback = nil ,
hold_close_callback = nil ,
close_hold_callback = nil ,
show_parent = nil ,
-- Internal: remember first sizes computed when title_shrink_font_to_fit=true,
-- and keep using them after :setTitle() in case a smaller font size is needed,
-- to keep the TitleBar geometry stable.
_initial_title_top_padding = nil ,
_initial_title_text_baseline = nil ,
_initial_titlebar_height = nil ,
_initial_filler_height = nil ,
_initial_re_init_needed = nil ,
}
function TitleBar : init ( )
if self.close_callback then
self.right_icon = " exit "
self.right_icon = " clos e"
self.right_icon_tap_callback = self.close_callback
self.right_icon_allow_flash = false
if self.close_hold_callback then
@ -82,25 +101,86 @@ function TitleBar:init()
end
-- Title, subtitle, and their alignment
if not self.title_face then
self.title_face = self.fullscreen and self.title_face_fullscreen or self.title_face_not_fullscreen
local title_face = self.title_face
if not title_face then
title_face = self.fullscreen and self.title_face_fullscreen or self.title_face_not_fullscreen
end
if not self.title_top_padding then
if self.title_multilines then
self.title_widget = TextBoxWidget : new {
text = self.title ,
alignment = self.align ,
width = title_max_width ,
face = title_face ,
}
else
while true do
self.title_widget = TextWidget : new {
text = self.title ,
face = title_face ,
padding = 0 ,
max_width = not self.title_shrink_font_to_fit and title_max_width ,
-- truncate if not self.title_shrink_font_to_fit
}
if not self.title_shrink_font_to_fit then
break -- truncation allowed, no loop needed
end
if self.title_widget : getWidth ( ) <= title_max_width then
break -- text with normal font fits, no loop needed
end
-- Text doesn't fit
if not self._initial_titlebar_height then
-- We're with title_shrink_font_to_fit and in the first :init():
-- we don't want to go on measuring with this too long text.
-- We want metrics proper for when text fits, so if later :setTitle()
-- is called with a text that fits, this text will look allright.
-- Longer title with a smaller font size should be laid out on the
-- baseline of a fitted text.
-- So, go on computing sizes with an empty title. When all is
-- gathered, we'll re :init() ourselves with the original title,
-- using the metrics we're computing now (self._initial*).
self._initial_re_init_needed = true
self.title_widget : free ( )
self.title_widget = TextWidget : new {
text = " " ,
face = title_face ,
padding = 0 ,
}
break
end
-- otherwise, loop and do the same with a smaller font size
self.title_widget : free ( )
title_face = Font : getFace ( title_face.orig_font , title_face.orig_size - 1 )
end
end
local title_top_padding = self.title_top_padding
if not title_top_padding then
-- Compute it so baselines of the text and of the icons align.
-- Our icons' baselines looks like they could be at 83% to 90% of their height.
local face_height , face_baseline = self.title_face . ftface : getHeightAndAscender ( ) -- luacheck: no unused
local text_baseline = self.title_widget : getBaseline ( )
local icon_height = math.max ( left_icon_size , right_icon_size )
local icon_baseline = icon_height * 0.85 + self.button_padding
self.title_top_padding = Math.round ( math.max ( 0 , icon_baseline - face_baseline ) )
title_top_padding = Math.round ( math.max ( 0 , icon_baseline - text_baseline ) )
if self.title_shrink_font_to_fit then
-- Use, or store, the first top padding and baseline we have computed,
-- so the text stays vertically stable
if self._initial_title_top_padding then
-- Use this to have baselines aligned:
-- title_top_padding = Math.round(self._initial_title_top_padding + self._initial_title_text_baseline - text_baseline)
-- But then, smaller text is not vertically centered in the title bar.
-- So, go with just half the baseline difference:
title_top_padding = Math.round ( self._initial_title_top_padding + ( self._initial_title_text_baseline - text_baseline ) / 2 )
else
self._initial_title_top_padding = title_top_padding
self._initial_title_text_baseline = text_baseline
end
end
end
self.title_widget = TextWidget : new {
text = self.title ,
face = self.title_face ,
max_width = title_max_width ,
padding = 0 ,
}
self.subtitle_widget = nil
if self.subtitle then
-- No specific options for subtitles currently: truncate if too long.
-- We might want to add truncate_left if this gets used for a filepath
-- as in FileManager.
self.subtitle_widget = TextWidget : new {
text = self.subtitle ,
face = self.subtitle_face ,
@ -115,7 +195,7 @@ function TitleBar:init()
self.title_group = VerticalGroup : new {
align = self.align ,
VerticalSpan : new { width = self. title_top_padding} ,
VerticalSpan : new { width = } ,
self.title_widget ,
self.subtitle_widget and VerticalSpan : new { width = self.title_subtitle_v_padding } ,
self.subtitle_widget ,
@ -139,15 +219,45 @@ function TitleBar:init()
-- the one we set as self.dimen.h.
self.titlebar_height = self.title_group : getSize ( ) . h
if self.title_shrink_font_to_fit then
-- Use, or store, the first title_group height we have computed,
-- so the TitleBar geometry and the bottom line position stay stable
-- (face height may have changed, even after we kept the baseline
-- stable, as we did above).
if self._initial_titlebar_height then
self.titlebar_height = self._initial_titlebar_height
else
self._initial_titlebar_height = self.titlebar_height
end
end
if self.with_bottom_line then
-- Be sure we add between the text and the line at least as much padding
-- as above the text, to keep it vertically centered.
local title_bottom_padding = math.max ( self.title_top_padding , Size.padding . default )
local title_bottom_padding = math.max ( title_top_padding , Size.padding . default )
local filler_height = self.titlebar_height + title_bottom_padding
if self.title_shrink_font_to_fit then
-- Use, or store, the first filler height we have computed,
if self._initial_filler_height then
filler_height = self._initial_filler_height
else
self._initial_filler_height = filler_height
end
end
local line_widget = LineWidget : new {
dimen = Geom : new { w = self.width , h = Size.line . thick } ,
background = self.bottom_line_color ;
}
if self.bottom_line_h_padding then
line_widget.dimen . w = line_widget.dimen . w - 2 * self.bottom_line_h_padding
line_widget = HorizontalGroup : new {
HorizontalSpan : new { width = self.bottom_line_h_padding } ,
line_widget ,
}
end
local filler_and_bottom_line = VerticalGroup : new {
VerticalSpan : new { width = self.titlebar_height + title_bottom_padding } ,
LineWidget : new {
dimen = Geom : new { w = self.width , h = Size.line . thick } ,
} ,
VerticalSpan : new { width = filler_height } ,
line_widget ,
}
table.insert ( self , filler_and_bottom_line )
self.titlebar_height = filler_and_bottom_line : getSize ( ) . h
@ -161,6 +271,14 @@ function TitleBar:init()
end
self.titlebar_height = self.titlebar_height + self.bottom_v_padding
if self._initial_re_init_needed then
-- We have computed all the self._initial_ metrics needed.
self._initial_re_init_needed = nil
self : clear ( )
self : init ( )
return
end
self.dimen = Geom : new {
w = self.width ,
h = self.titlebar_height , -- buttons can overflow this
@ -177,7 +295,8 @@ function TitleBar:init()
overlap_align = " left " ,
callback = self.left_icon_tap_callback ,
hold_callback = self.left_icon_hold_callback ,
allow_flash = self.left_icon_allow_flash
allow_flash = self.left_icon_allow_flash ,
show_parent = self.show_parent ,
}
table.insert ( self , self.left_button )
end
@ -192,7 +311,8 @@ function TitleBar:init()
overlap_align = " right " ,
callback = self.right_icon_tap_callback ,
hold_callback = self.right_icon_hold_callback ,
allow_flash = self.right_icon_allow_flash
allow_flash = self.right_icon_allow_flash ,
show_parent = self.show_parent ,
}
table.insert ( self , self.right_button )
end
@ -215,13 +335,40 @@ function TitleBar:getHeight()
return self.titlebar_height
end
function TitleBar : setTitle ( title )
self.title_widget : setText ( title )
if self.inner_title_group then
self.inner_title_group : resetLayout ( )
function TitleBar : setTitle ( title , no_refresh )
if self.title_multilines or self.title_shrink_font_to_fit then
-- We need to re-init the whole widget as its height or
-- padding may change.
local previous_height = self.titlebar_height
-- Call WidgetContainer:clear() that will call :free() and
-- will remove subwidgets from the OverlapGroup we are.
self : clear ( )
self.title = title
self : init ( )
if no_refresh then
-- If caller is sure to handle refresh correctly, it can provides this
return
end
if self.title_multilines and self.titlebar_height ~= previous_height then
-- Title height have changed, and the upper widget may not have
-- hooks to refresh a combination of its previous size and new
-- size: be sure everything is repainted
UIManager : setDirty ( " all " , " ui " )
else
UIManager : setDirty ( self.show_parent , " ui " , self.dimen )
end
else
-- TextWidget with max-width: we can just update its text
self.title_widget : setText ( title )
if self.inner_title_group then
self.inner_title_group : resetLayout ( )
end
self.title_group : resetLayout ( )
if no_refresh then
return
end
UIManager : setDirty ( self.show_parent , " ui " , self.dimen )
end
self.title_group : resetLayout ( )
UIManager : setDirty ( self.show_parent , " ui " , self.dimen )
end
function TitleBar : setSubTitle ( subtitle )
poire-z
2 years ago
