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Editor.lua
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Editor.lua
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local fileman = require "file_manager"
local script = {}
local baseTitle = "Multiviewer 2.1 - "
local defaultWindowTitleName = "No project"
local zoomRate = 0.1
local dragZoomRate = 0.005
local floor = math.floor
local function round(x, interval)
if interval then return floor(x / interval + 0.5) * interval end
return floor(x + 0.5)
end
local function clamp(x, min, max)
return x > min and (x < max and x or max) or min
end
function script.init(self)
self.msx, self.msy = 0, 0
self.mwx, self.mwy = 0, 0
self.lastmwx, self.lastmwy = 0, 0
self.lastmsx, self.lastmsy = 0, 0
self.images = {}
self.projectFilePath = nil
self.projectIsDirty = false
end
function script.draw(self)
love.graphics.setColor(1, 1, 1, 1)
for i,v in ipairs(self.images) do
love.graphics.draw(v.img, v.x, v.y, 0, v.scale, v.scale, v.ox, v.oy)
end
if self.hoverImg then
local img = self.hoverImg
-- Draw outline around hovered image.
love.graphics.setColor(0, 1, 1, 1)
love.graphics.setLineWidth(1)
love.graphics.rectangle("line", img.lt, img.top, img.w*img.scale, img.h*img.scale)
if self.scaling then
local z = camera.zoom
-- Base scale line & end square.
love.graphics.setLineWidth(4/z)
love.graphics.setColor(0, 1, 1, 1)
local vx, vy = vector.normalize(self.mwx - img.x, self.mwy - img.y)
local x, y = img.x + vx * self.dragStartDist, img.y + vy * self.dragStartDist
love.graphics.line(img.x, img.y, x, y)
love.graphics.circle("fill", x, y, 6/z, 4)
-- Base scale circle.
local a = math.atan2(vy, vx)
love.graphics.setLineWidth(1/z)
love.graphics.setColor(0, 1, 1, 0.6)
love.graphics.arc("line", "open", img.x, img.y, self.dragStartDist, a + 0.15, a + math.pi*2 - 0.15, 64)
-- New scale circle.
love.graphics.setColor(0, 0.5, 0.5, 0.8)
local r = vector.len(self.mwx - img.x, self.mwy - img.y)
love.graphics.arc("line", "open", img.x, img.y, r, a + 0.15, a + math.pi*2 - 0.15, 64)
-- New scale line & end squares.
love.graphics.setLineWidth(2/z)
love.graphics.setColor(0, 0.5, 0.5, 1)
love.graphics.line(img.x, img.y, self.mwx, self.mwy)
love.graphics.circle("fill", self.mwx, self.mwy, 6/z, 4)
love.graphics.setColor(1, 0, 0, 1)
love.graphics.circle("fill", self.mwx, self.mwy, 3/z, 4)
-- Draw scale factor text (with background box).
love.graphics.push()
love.graphics.scale(1/z, 1/z)
local tx, ty = self.mwx*z + 10, self.mwy*z - 30
local str = "x" .. round(self.dragScale, 0.001)
local font = love.graphics.getFont()
local fw, fh = font:getWidth("x1.000") + 9, font:getHeight() + 7
love.graphics.setColor(1, 1, 1, 0.5)
love.graphics.rectangle("fill", tx -3, ty -2, fw, fh, 4, 4, 3)
love.graphics.setColor(0.5, 0, 0, 1)
love.graphics.print(str, tx, ty, 0, 1, 1)
love.graphics.pop()
end
end
end
local function changeDepth(self, image, dir)
local from
for i,img in ipairs(self.images) do
if img == image then
from = i
break
end
end
if not from then return end
local to = clamp(from + 1 * dir, 1, #self.images)
if input.isPressed("ctrl") then
to = dir == 1 and #self.images or 1
end
if to ~= from then
table.remove(self.images, from)
table.insert(self.images, to, image)
end
end
local function setWindowTitle(self)
local filename = self.projectFileName or defaultWindowTitleName
local title = baseTitle .. filename
if self.projectIsDirty then title = title .. "*" end
love.window.setTitle(title)
end
local function setDirty(self, dirty)
if dirty and not self.projectIsDirty then
self.projectIsDirty = true
setWindowTitle(self)
elseif not dirty and self.projectIsDirty then
self.projectIsDirty = false
setWindowTitle(self)
end
end
local function updateImageRect(img)
local w, h = img.w * img.scale, img.h * img.scale
img.lt, img.rt = img.x - w/2, img.x + w/2
img.top, img.bot = img.y - h/2, img.y + h/2
end
local function addImage(self, imgData, name, x, y, scale, dontDirty)
if not dontDirty then setDirty(self, true) end
x = x or 0; y = y or 0; scale = scale or 1
local i = {
img = imgData, name = name,
x = x, y = y, scale = scale
}
local w, h = imgData:getDimensions()
i.w, i.h = w, h
i.ox, i.oy = w/2, h/2
w, h = w * scale, h * scale
i.lt, i.rt, i.top, i.bot = x - w/2, x + w/2, y - h/2, y + h/2
table.insert(self.images, i)
shouldUpdate = true
end
local function getImageFromAbsolutePath(path)
local file, error = io.open(path, "rb")
if error then
print(error)
return
end
local filename = fileman.get_filename_from_path(path) or "new.jpg"
local fileData, error = love.filesystem.newFileData(file:read("*a"), filename)
file:close()
if not error then
local isSuccess, result = pcall(love.graphics.newImage, fileData)
if not isSuccess then
print("Error generating image from file:\n "..result)
else
return result
end
else
print("Error reading file:\n "..error)
end
end
local function safeLoadNewImage(file)
local success, img = pcall(love.graphics.newImage, file)
if success then
return img
end
end
function script.openProjectFile(self, absPath)
local data = fileman.decode_project_file(absPath)
if not data then return end
if not self.projectFilePath then -- Use opened project as the current one.
self.projectIsDirty = false
self.projectFilePath = absPath
self.projectFileName = fileman.get_filename_from_path(absPath)
if #self.images ~= 0 then self.projectIsDirty = true end
setWindowTitle(self)
if data.camera then -- Set camera pos and zoom from loaded data.
local cd = data.camera
camera.pos.x, camera.pos.y = cd.pos.x, -cd.pos.y
camera.zoom = 1/cd.zoom
end
end
-- Append images from opened project to the current workspace.
local images = (data[1] and data or data.images) or {}
for i,img in ipairs(images) do
-- Save Format = { path, z, pos = { x, y }, size = { x, y } }
local image = getImageFromAbsolutePath(img.path)
if image then
local w, h = image:getDimensions()
local scale = img.size.x / w
addImage(self, image, img.path, img.pos.x, -img.pos.y, scale, true)
end
end
return data
end
-- Gets a Love File object with an absolute path filename.
function script.fileDropped(self, file)
local absPath = file:getFilename()
local img = safeLoadNewImage(file)
if img then
local x, y = self.mwx, self.mwy
addImage(self, img, absPath, x, y)
elseif fileman.get_file_extension(absPath) == fileman.fileExt then
local data = script.openProjectFile(self, absPath)
end
end
-- Gets the absolute path to a directory, which is allowed to be mounted with love.filesystem.
-- From that you can get the local and absolute paths of files in the directory.
function script.directoryDropped(self, absDirPath)
love.filesystem.mount(absDirPath, "newImages")
local files = love.filesystem.getDirectoryItems("newImages")
local x, y = self.mwx, self.mwy
for k,path in pairs(files) do
local mountedPath = "newImages/" .. path
local info = love.filesystem.getInfo(mountedPath)
if not info then
print("ERROR: Can't get file info for path: \n " .. mountedPath)
elseif info.type == "file" then
local img = safeLoadNewImage(mountedPath)
if img then addImage(self, img, absDirPath .. "/" .. path, x, y) end
end
end
end
local function makeProjectData(self)
local data = { camera = {}, images = {} }
-- Set camera data.
local cd = data.camera
cd.zoom = 1/camera.zoom
cd.pos = { x = camera.pos.x, y = -camera.pos.y }
-- Set image data.
local id = data.images
for i,img in ipairs(self.images) do
-- Save Format = { path, z, pos = { x, y }, size = { x, y } }
local iw, ih = img.img:getDimensions()
local w, h = iw * img.scale, ih * img.scale
id[i] = {
path = img.name, z = i,
pos = { x = img.x, y = -img.y }, size = { x = w, y = h }
}
end
return data
end
local function saveProject(self)
if not self.projectFilePath then
self.projectFileName = "_project" .. fileman.fileExt
self.projectFilePath = love.filesystem.getWorkingDirectory() .. "/" .. self.projectFileName
self.projectIsDirty = true
end
if self.projectIsDirty then
local data = makeProjectData(self)
fileman.encode_project_file(data, self.projectFilePath)
end
end
local function posOverlapsImage(img, x, y)
return x < img.rt and x > img.lt and y < img.bot and y > img.top
end
local function updateHoverList(self, except)
self.hoverList = {}
for i,img in ipairs(self.images) do
if posOverlapsImage(img, self.mwx, self.mwy) then
table.insert(self.hoverList, img)
end
end
end
function script.update(self, dt)
self.msx, self.msy = love.mouse.getPosition()
self.mwx, self.mwy = camera:screenToWorld(self.msx, self.msy)
if self.panning then
local dx, dy = self.msx - self.lastmsx, self.msy - self.lastmsy
if dx ~= 0 or dy ~= 0 then setDirty(self, true) end
if input.isPressed("ctrl") then
local z = -dy * dragZoomRate
-- Zoom around the drag start position, since it's a bit weird to zoom
-- around a moving cursor (you'd be dragging to zoom and change the zoom pos).
camera:zoomIn(z, self.panning.x, self.panning.y)
else
dx, dy = camera:screenToWorld(dx, dy, true)
local camPos = camera.pos
camPos.x, camPos.y = camPos.x - dx, camPos.y - dy
end
-- Now that camera has moved, update mouse world pos for smoother dragging & scaling.
self.mwx, self.mwy = camera:screenToWorld(self.msx, self.msy)
end
if self.dragging then
local img = self.hoverImg
if img then
local x, y = self.mwx + self.dragx, self.mwy + self.dragy
if x ~= img.x or y ~= img.y then setDirty(self, true) end
img.x, img.y = x, y
updateImageRect(img)
end
elseif self.scaling then
local img = self.hoverImg
if img then
local ox, oy = img.x - self.mwx, img.y - self.mwy
local newDist = vector.len(ox, oy)
local scale = newDist / self.dragStartDist
if scale ~= 1 then setDirty(self, true) end
img.scale = self.dragStartScale * scale
self.dragScale = scale
updateImageRect(img)
end
else
updateHoverList(self)
self.hoverImg = self.hoverList[#self.hoverList]
end
self.lastmsx, self.lastmsy = self.msx, self.msy
self.lastmwx, self.lastmwy = self.mwx, self.mwy
end
function script.input(self, name, change)
shouldUpdate = true
if name == "click" then
if change == 1 and self.hoverImg then
self.dragging = true
self.dragx, self.dragy = self.hoverImg.x - self.mwx, self.hoverImg.y - self.mwy
elseif change == -1 then
self.dragging = nil
self.dropTarget = nil
end
elseif name == "scale" then
if change == 1 and self.hoverImg and not self.scaling then
self.scaling = true
self.dragx, self.dragy = self.hoverImg.x - self.mwx, self.hoverImg.y - self.mwy
self.dragStartDist = vector.len(self.dragx, self.dragy)
self.dragStartScale = self.hoverImg.scale
elseif change == -1 then
self.scaling = false
end
elseif name == "zoom in" then
setDirty(self, true)
camera:zoomIn(zoomRate, self.msx, self.msy)
elseif name == "zoom out" then
setDirty(self, true)
camera:zoomIn(-zoomRate, self.msx, self.msy)
elseif name == "pan" then
if change == 1 then
self.panning = { x = self.msx, y = self.msy }
else
self.panning = nil
end
elseif name == "move up" and change == 1 then
if self.hoverImg then
changeDepth(self, self.hoverImg, 1)
end
elseif name == "move down" and change == 1 then
if self.hoverImg then
changeDepth(self, self.hoverImg, -1)
end
elseif name == "delete" and change == 1 then
setDirty(self, true)
if self.hoverImg then
for i,v in ipairs(self.images) do
if v == self.hoverImg then table.remove(self.images, i) end
end
self.hoverImg = nil
end
elseif name == "save" and change == 1 then
if input.isPressed("ctrl") then
saveProject(self)
setDirty(self, false)
end
elseif name == "copy" and change == 1 then
if input.isPressed("ctrl") and self.hoverImg then
love.system.setClipboardText(self.hoverImg.name)
end
elseif name == "paste" and change == 1 then
if input.isPressed("ctrl") then
local path = love.system.getClipboardText()
local image = getImageFromAbsolutePath(path)
if image then
addImage(self, image, path, self.mwx, self.mwy)
end
end
elseif name == "confirm" and change == 1 then
if input.isPressed("alt") then -- Toggle borderless.
local w, h, flags = love.window.getMode()
flags.borderless = not flags.borderless
love.window.setMode(w, h, flags)
shouldUpdate = true
end
elseif name == "quit" and change == 1 then
love.event.quit(0)
end
end
local mt = { __index = script }
function new(self)
return setmetatable({}, mt)
end
return new