tibia-client/modules/corelib/ui/uiimageview.lua

100 lines
2.7 KiB
Lua

-- @docclass
UIImageView = extends(UIWidget)
function UIImageView.create()
local imageView = UIImageView.internalCreate()
imageView.zoom = 1
imageView.minZoom = math.pow(10, -2)
imageView.maxZoom = math.pow(10, 2)
imageView:setClipping(true)
return imageView
end
function UIImageView:getDefaultZoom()
local width = self:getWidth()
local height = self:getHeight()
local textureWidth = self:getImageTextureWidth()
local textureHeight = self:getImageTextureHeight()
local zoomX = width / textureWidth
local zoomY = height / textureHeight
return math.min(zoomX, zoomY)
end
function UIImageView:getImagePosition(x, y)
x = x or self:getWidth() / 2
y = y or self:getHeight() / 2
local offsetX = self:getImageOffsetX()
local offsetY = self:getImageOffsetY()
local posX = (x - offsetX) / self.zoom
local posY = (y - offsetY) / self.zoom
return posX, posY
end
function UIImageView:setImage(image)
self:setImageSource(image)
local zoom = self:getDefaultZoom()
self:setZoom(zoom)
self:center()
end
function UIImageView:setZoom(zoom, x, y)
zoom = math.max(math.min(zoom, self.maxZoom), self.minZoom)
local posX, posY = self:getImagePosition(x, y)
local textureWidth = self:getImageTextureWidth()
local textureHeight = self:getImageTextureHeight()
local imageWidth = textureWidth * zoom
local imageHeight = textureHeight * zoom
self:setImageWidth(imageWidth)
self:setImageHeight(imageHeight)
self.zoom = zoom
self:move(posX, posY, x, y)
end
function UIImageView:zoomIn(x, y)
local zoom = self.zoom * 1.1
self:setZoom(zoom, x, y)
end
function UIImageView:zoomOut(x, y)
local zoom = self.zoom / 1.1
self:setZoom(zoom, x, y)
end
function UIImageView:center()
self:move(self:getImageTextureWidth() / 2, self:getImageTextureHeight() / 2)
end
function UIImageView:move(x, y, centerX, centerY)
x = math.max(math.min(x, self:getImageTextureWidth()), 0)
y = math.max(math.min(y, self:getImageTextureHeight()), 0)
local centerX = centerX or self:getWidth() / 2
local centerY = centerY or self:getHeight() / 2
local offsetX = centerX - x * self.zoom
local offsetY = centerY - y * self.zoom
self:setImageOffset({x=offsetX, y=offsetY})
end
function UIImageView:onDragEnter(pos)
return true
end
function UIImageView:onDragMove(pos, moved)
local posX, posY = self:getImagePosition()
self:move(posX - moved.x / self.zoom, posY - moved.y / self.zoom)
return true
end
function UIImageView:onDragLeave(widget, pos)
return true
end
function UIImageView:onMouseWheel(mousePos, direction)
local x = mousePos.x - self:getX()
local y = mousePos.y - self:getY()
if direction == MouseWheelUp then
self:zoomIn(x, y)
elseif direction == MouseWheelDown then
self:zoomOut(x, y)
end
end