MayaTheShy/Opus
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canvas overhaul

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This commit is contained in:
kepler155c@gmail.com
2020-03-31 09:57:23 -06:00
parent 369070e19c
commit 5a874c1944
69 changed files with 1134 additions and 786 deletions
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87
sys/modules/opus/ui/components/Viewport.lua
View File

@@ -1,16 +1,15 @@
local class = require('opus.class')
local UI = require('opus.ui')
local colors = _G.colors
UI.Viewport = class(UI.Window)
UI.Viewport.defaults = {
UIElement = 'Viewport',
backgroundColor = colors.cyan,
accelerators = {
down = 'scroll_down',
up = 'scroll_up',
home = 'scroll_top',
left = 'scroll_left',
right = 'scroll_right',
[ 'end' ] = 'scroll_bottom',
pageUp = 'scroll_pageUp',
[ 'control-b' ] = 'scroll_pageUp',
@@ -18,53 +17,53 @@ UI.Viewport.defaults = {
[ 'control-f' ] = 'scroll_pageDown',
},
}
function UI.Viewport:layout()
UI.Window.layout(self)
if not self.canvas then
self.canvas = self:addLayer()
else
self.canvas:resize(self.width, self.height)
function UI.Viewport:postInit()
if self.showScrollBar then
self.scrollBar = UI.ScrollBar()
end
end
function UI.Viewport:enable()
UI.Window.enable(self)
self.canvas:setVisible(true)
end
function UI.Viewport:disable()
UI.Window.disable(self)
self.canvas:setVisible(false)
end
function UI.Viewport:setScrollPosition(offset)
local oldOffset = self.offy
self.offy = math.max(offset, 0)
self.offy = math.min(self.offy, math.max(#self.canvas.lines, self.height) - self.height)
if self.offy ~= oldOffset then
function UI.Viewport:setScrollPosition(offy, offx) -- argh - reverse
local oldOffy = self.offy
self.offy = math.max(offy, 0)
self.offy = math.min(self.offy, math.max(#self.lines, self.height) - self.height)
if self.offy ~= oldOffy then
if self.scrollBar then
self.scrollBar:draw()
end
self.canvas.offy = offset
self.canvas:dirty()
self.offy = offy
self:dirty(true)
end
local oldOffx = self.offx
self.offx = math.max(offx or 0, 0)
self.offx = math.min(self.offx, math.max(#self.lines[1], self.width) - self.width)
if self.offx ~= oldOffx then
if self.scrollBar then
--self.scrollBar:draw()
end
self.offx = offx or 0
self:dirty(true)
end
end
function UI.Viewport:write(x, y, text, bg, tc)
if y > #self.canvas.lines then
for i = #self.canvas.lines, y do
self.canvas.lines[i + 1] = { }
self.canvas:clearLine(i + 1, self.backgroundColor, self.textColor)
end
if y > #self.lines then
self:resizeBuffer(self.width, y)
end
return UI.Window.write(self, x, y, text, bg, tc)
end
function UI.Viewport:setViewHeight(h)
if h > #self.lines then
self:resizeBuffer(self.width, h)
end
end
function UI.Viewport:reset()
self.offy = 0
self.canvas.offy = 0
for i = self.height + 1, #self.canvas.lines do
self.canvas.lines[i] = nil
for i = self.height + 1, #self.lines do
self.lines[i] = nil
end
end
@@ -72,26 +71,30 @@ function UI.Viewport:getViewArea()
return {
y = (self.offy or 0) + 1,
height = self.height,
totalHeight = #self.canvas.lines,
totalHeight = #self.lines,
offsetY = self.offy or 0,
}
end
function UI.Viewport:eventHandler(event)
if event.type == 'scroll_down' then
self:setScrollPosition(self.offy + 1)
self:setScrollPosition(self.offy + 1, self.offx)
elseif event.type == 'scroll_up' then
self:setScrollPosition(self.offy - 1)
self:setScrollPosition(self.offy - 1, self.offx)
elseif event.type == 'scroll_left' then
self:setScrollPosition(self.offy, self.offx - 1)
elseif event.type == 'scroll_right' then
self:setScrollPosition(self.offy, self.offx + 1)
elseif event.type == 'scroll_top' then
self:setScrollPosition(0)
self:setScrollPosition(0, 0)
elseif event.type == 'scroll_bottom' then
self:setScrollPosition(10000000)
self:setScrollPosition(10000000, 0)
elseif event.type == 'scroll_pageUp' then
self:setScrollPosition(self.offy - self.height)
self:setScrollPosition(self.offy - self.height, self.offx)
elseif event.type == 'scroll_pageDown' then
self:setScrollPosition(self.offy + self.height)
self:setScrollPosition(self.offy + self.height, self.offx)
elseif event.type == 'scroll_to' then
self:setScrollPosition(event.offset)
self:setScrollPosition(event.offset, 0)
else
return false
end