Francesco Abbate
cb08c5cbb7
The last column of pixel on the window's right side isn't correctly drawn and pixels appear dirty and more noticeably when the a NagView message was previously shown, a stripe of red pixels remains on the right. We use now a more souding roundig scheme. Now the rectangles to clip or to draw are passed around as Lua numbers without any rounding. In turns, when the rect coordinates are passed to the renderer we ensure the border of the rect are correctly snapped to the pixel's grid. It works by computing the coordinates of the edges, round them to integers and then compute the rect's width based on the rounded coordinates values.
160 lines
3.7 KiB
Lua
160 lines
3.7 KiB
Lua
local core = require "core"
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local config = require "core.config"
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local style = require "core.style"
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local common = require "core.common"
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local Object = require "core.object"
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local View = Object:extend()
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-- context can be "application" or "session". The instance of objects
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-- with context "session" will be closed when a project session is
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-- terminated. The context "application" is for functional UI elements.
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View.context = "application"
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function View:new()
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self.position = { x = 0, y = 0 }
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self.size = { x = 0, y = 0 }
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self.scroll = { x = 0, y = 0, to = { x = 0, y = 0 } }
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self.cursor = "arrow"
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self.scrollable = false
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end
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function View:move_towards(t, k, dest, rate)
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if type(t) ~= "table" then
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return self:move_towards(self, t, k, dest, rate)
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end
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local val = t[k]
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if not config.transitions or math.abs(val - dest) < 0.5 then
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t[k] = dest
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else
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rate = rate or 0.5
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if config.fps ~= 60 or config.animation_rate ~= 1 then
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local dt = 60 / config.fps
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rate = 1 - common.clamp(1 - rate, 1e-8, 1 - 1e-8)^(config.animation_rate * dt)
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end
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t[k] = common.lerp(val, dest, rate)
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end
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if val ~= dest then
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core.redraw = true
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end
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end
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function View:try_close(do_close)
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do_close()
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end
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function View:get_name()
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return "---"
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end
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function View:get_scrollable_size()
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return math.huge
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end
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function View:get_scrollbar_rect()
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local sz = self:get_scrollable_size()
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if sz <= self.size.y or sz == math.huge then
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return 0, 0, 0, 0
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end
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local h = math.max(20, self.size.y * self.size.y / sz)
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return
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self.position.x + self.size.x - style.scrollbar_size,
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self.position.y + self.scroll.y * (self.size.y - h) / (sz - self.size.y),
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style.scrollbar_size,
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h
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end
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function View:scrollbar_overlaps_point(x, y)
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local sx, sy, sw, sh = self:get_scrollbar_rect()
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return x >= sx - sw * 3 and x < sx + sw and y >= sy and y < sy + sh
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end
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function View:on_mouse_pressed(button, x, y, clicks)
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if self:scrollbar_overlaps_point(x, y) then
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self.dragging_scrollbar = true
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return true
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end
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end
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function View:on_mouse_released(button, x, y)
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self.dragging_scrollbar = false
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end
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function View:on_mouse_moved(x, y, dx, dy)
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if self.dragging_scrollbar then
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local delta = self:get_scrollable_size() / self.size.y * dy
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self.scroll.to.y = self.scroll.to.y + delta
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end
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self.hovered_scrollbar = self:scrollbar_overlaps_point(x, y)
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end
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function View:on_text_input(text)
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-- no-op
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end
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function View:on_mouse_wheel(y)
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if self.scrollable then
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self.scroll.to.y = self.scroll.to.y + y * -config.mouse_wheel_scroll
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end
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end
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function View:get_content_bounds()
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local x = self.scroll.x
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local y = self.scroll.y
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return x, y, x + self.size.x, y + self.size.y
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end
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function View:get_content_offset()
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local x = common.round(self.position.x - self.scroll.x)
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local y = common.round(self.position.y - self.scroll.y)
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return x, y
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end
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function View:clamp_scroll_position()
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local max = self:get_scrollable_size() - self.size.y
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self.scroll.to.y = common.clamp(self.scroll.to.y, 0, max)
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end
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function View:update()
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self:clamp_scroll_position()
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self:move_towards(self.scroll, "x", self.scroll.to.x, 0.3)
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self:move_towards(self.scroll, "y", self.scroll.to.y, 0.3)
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end
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function View:draw_background(color)
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local x, y = self.position.x, self.position.y
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local w, h = self.size.x, self.size.y
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renderer.draw_rect(x, y, w, h, color)
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end
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function View:draw_scrollbar()
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local x, y, w, h = self:get_scrollbar_rect()
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local highlight = self.hovered_scrollbar or self.dragging_scrollbar
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local color = highlight and style.scrollbar2 or style.scrollbar
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renderer.draw_rect(x, y, w, h, color)
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end
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function View:draw()
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end
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return View
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