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Text/HTML widgets: allow scrolling with the scrollbar

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By tapping on or panning the scrollbar.
This commit is contained in:
poire-z
2020-08-26 20:44:58 +02:00
parent 69d11ebfd9
commit 29d83b67d3
4 changed files with 116 additions and 10 deletions
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9
frontend/ui/widget/scrollhtmlwidget.lua
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@@ -12,7 +12,6 @@ local HorizontalSpan = require("ui/widget/horizontalspan")
local InputContainer = require("ui/widget/container/inputcontainer")
local UIManager = require("ui/uimanager")
local VerticalScrollBar = require("ui/widget/verticalscrollbar")
local Math = require("optmath")
local Input = Device.input
local Screen = Device.screen
@@ -46,6 +45,9 @@ function ScrollHtmlWidget:init()
enable = self.htmlbox_widget.page_count > 1,
width = self.scroll_bar_width,
height = self.height,
scroll_callback = function(ratio)
self:scrollToRatio(ratio)
end
}
self.v_scroll_bar:set((self.htmlbox_widget.page_number-1) / self.htmlbox_widget.page_count, self.htmlbox_widget.page_number / self.htmlbox_widget.page_count)
@@ -89,7 +91,10 @@ end
function ScrollHtmlWidget:scrollToRatio(ratio)
ratio = math.max(0, math.min(1, ratio)) -- ensure ratio is between 0 and 1 (100%)
local page_num = 1 + Math.round((self.htmlbox_widget.page_count - 1) * ratio)
local page_num = 1 + math.floor((self.htmlbox_widget.page_count) * ratio)
if page_num > self.htmlbox_widget.page_count then
page_num = self.htmlbox_widget.page_count
end
if page_num == self.htmlbox_widget.page_number then
return
end