437 lines
12 KiB
Lua
437 lines
12 KiB
Lua
-- Path of Building
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--
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-- Class: DropDown Control
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-- Basic drop down control.
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--
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local ipairs = ipairs
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local m_min = math.min
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local m_max = math.max
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local m_floor = math.floor
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local DropDownClass = newClass("DropDownControl", "Control", "ControlHost", "TooltipHost", "SearchHost", function(self, anchor, x, y, width, height, list, selFunc, tooltipText)
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self.Control(anchor, x, y, width, height)
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self.ControlHost()
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self.TooltipHost(tooltipText)
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self.SearchHost(
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-- list to filter
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function()
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return self.list
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end,
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-- value mapping function
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function(listVal)
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return StripEscapes(type(listVal) == "table" and listVal.label or listVal)
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end
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)
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self.controls.scrollBar = new("ScrollBarControl", {"TOPRIGHT",self,"TOPRIGHT"}, -1, 0, 18, 0, (height - 4) * 4)
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self.controls.scrollBar.height = function()
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return self.dropHeight + 2
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end
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self.controls.scrollBar.shown = function()
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return self.dropped and self.controls.scrollBar.enabled
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end
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self.dropHeight = 0
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self.list = list or { }
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self.selIndex = 1
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self.selFunc = selFunc
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end)
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-- maps the actual dropdown row index (after eventual filtering) to the original (unfiltered) list index
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function DropDownClass:DropIndexToListIndex(dropIndex)
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-- 1:1
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if not self:IsSearchActive() then
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return dropIndex
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end
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-- out of bounds
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if not dropIndex or dropIndex <= 0 or dropIndex > self:GetDropCount() then
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return nil
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end
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-- actual mapping
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for listIndex, info in ipairs(self.searchInfos) do
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if info and info.matches then
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dropIndex = dropIndex - 1
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if (dropIndex <= 0) then
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return listIndex
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end
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end
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end
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end
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-- maps the the original (unfiltered) list index to the actual dropdown row index (after eventual filtering)
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function DropDownClass:ListIndexToDropIndex(listIndex, default)
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-- 1:1
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if not self:IsSearchActive() then
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return listIndex
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end
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-- out of bounds
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if not listIndex or listIndex <= 0 or listIndex > #self.list then
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return nil
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end
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-- actual mapping
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local dropIndex = 0
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for listIndexLoop, info in ipairs(self.searchInfos) do
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if info and info.matches then
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dropIndex = dropIndex + 1
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if (listIndex == listIndexLoop) then
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return dropIndex
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end
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end
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end
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-- given listIndex is currently filtered out
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return default
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end
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function DropDownClass:GetDropCount()
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if self:IsSearchActive() then
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return self:GetMatchCount()
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else
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return #self.list
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end
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end
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function DropDownClass:DrawSearchHighlights(label, searchInfo, x, y, width, height)
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if searchInfo and searchInfo.matches then
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local startX = 0
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local endX = 0
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local last = 0
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SetDrawColor(1, 1, 0, 0.2)
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for _, range in ipairs(searchInfo.ranges) do
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if range.from - last - 1 > 0 then
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startX = DrawStringWidth(height, "VAR", label:sub(last + 1, range.from - 1)) + x + endX
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else
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startX = endX
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end
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endX = DrawStringWidth(height, "VAR", label:sub(range.from, range.to)) + x + startX
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last = range.to
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DrawImage(nil, startX, y, endX - startX, height)
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end
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SetDrawColor(1, 1, 1)
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end
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end
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function DropDownClass:SelByValue(value, key)
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for index, listVal in ipairs(self.list) do
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if type(listVal) == "table" then
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if listVal[key] == value then
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self.selIndex = index
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return
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end
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else
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if listVal == value then
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self.selIndex = index
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return
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end
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end
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end
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end
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function DropDownClass:GetSelValue(key)
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return self.list[self.selIndex][key]
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end
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function DropDownClass:SetSel(newSel, dontCallSelFunc)
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newSel = m_max(1, m_min(self:GetDropCount(), newSel))
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newSel = self:DropIndexToListIndex(newSel)
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if newSel and newSel ~= self.selIndex then
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self.selIndex = newSel
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if not dontCallSelFunc and self.selFunc then
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self.selFunc(newSel, self.list[newSel])
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end
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end
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end
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function DropDownClass:ScrollSelIntoView()
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local width, height = self:GetSize()
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local scrollBar = self.controls.scrollBar
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scrollBar:SetContentDimension((height - 4) * self:GetDropCount(), self.dropHeight)
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scrollBar:ScrollIntoView((self:ListIndexToDropIndex(self.selIndex, 1) - 2) * (height - 4), 3 * (height - 4))
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end
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function DropDownClass:IsMouseOver()
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if not self:IsShown() then
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return false
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end
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if self:GetMouseOverControl() then
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return true
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end
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local x, y = self:GetPos()
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local width, height = self:GetSize()
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local cursorX, cursorY = GetCursorPos()
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local dropExtra = self.dropped and self.dropHeight + 2 or 0
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local mOver
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if self.dropUp then
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mOver = cursorX >= x and cursorY >= y - dropExtra and cursorX < x + width and cursorY < y + height
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else
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mOver = cursorX >= x and cursorY >= y and cursorX < x + width and cursorY < y + height + dropExtra
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end
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local mOverComp
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if mOver then
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if cursorY >= y and cursorY < y + height then
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mOverComp = "BODY"
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else
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mOverComp = "DROP"
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end
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end
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return mOver, mOverComp
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end
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function DropDownClass:Draw(viewPort)
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local x, y = self:GetPos()
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local width, height = self:GetSize()
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local enabled = self:IsEnabled()
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local scrollBar = self.controls.scrollBar
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local lineHeight = height - 4
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self.dropHeight = lineHeight * m_min(#self.list, 20)
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scrollBar.y = height + 1
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if y + height + self.dropHeight + 4 <= viewPort.y + viewPort.height then
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-- Drop fits below body
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self.dropUp = false
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else
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local linesAbove = m_floor((y - viewPort.y - 4) / lineHeight)
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local linesBelow = m_floor((viewPort.y + viewPort.height - y - height - 4) / lineHeight)
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if linesAbove > linesBelow then
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-- There's more room above the body than below
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self.dropUp = true
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if y - viewPort.y < self.dropHeight + 4 then
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-- Still doesn't fit, so clip it
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self.dropHeight = lineHeight * linesAbove
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end
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scrollBar.y = -self.dropHeight - 3
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else
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-- Doesn't fit below body, so clip it
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self.dropUp = false
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self.dropHeight = lineHeight * linesBelow
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end
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end
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if self:IsSearchActive() and not self.dropped then
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self:ResetSearch()
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end
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-- fit dropHeight to filtered content but keep initial orientation
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self.dropHeight = m_max(m_min(self.dropHeight, self:GetDropCount() * lineHeight), lineHeight)
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local mOver, mOverComp = self:IsMouseOver()
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local dropExtra = self.dropHeight + 4
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scrollBar:SetContentDimension(lineHeight * self:GetDropCount(), self.dropHeight)
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local dropY = self.dropUp and y - dropExtra or y + height
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if not enabled then
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SetDrawColor(0.33, 0.33, 0.33)
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elseif mOver or self.dropped then
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SetDrawColor(1, 1, 1)
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else
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SetDrawColor(0.5, 0.5, 0.5)
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end
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DrawImage(nil, x, y, width, height)
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if self.dropped then
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SetDrawLayer(nil, 5)
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DrawImage(nil, x, dropY, width, dropExtra)
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SetDrawLayer(nil, 0)
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end
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if not enabled then
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SetDrawColor(0, 0, 0)
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elseif self.dropped then
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SetDrawColor(0.5, 0.5, 0.5)
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elseif mOver then
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SetDrawColor(0.33, 0.33, 0.33)
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else
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SetDrawColor(0, 0, 0)
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end
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DrawImage(nil, x + 1, y + 1, width - 2, height - 2)
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if not enabled then
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SetDrawColor(0.33, 0.33, 0.33)
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elseif mOver or self.dropped then
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SetDrawColor(1, 1, 1)
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else
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SetDrawColor(0.5, 0.5, 0.5)
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end
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main:DrawArrow(x + width - height/2, y + height/2, height/2, height/2, "DOWN")
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if self.dropped then
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SetDrawLayer(nil, 5)
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SetDrawColor(0, 0, 0)
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DrawImage(nil, x + 1, dropY + 1, width - 2, dropExtra - 2)
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SetDrawLayer(nil, 0)
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end
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if self.otherDragSource then
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SetDrawColor(0, 1, 0, 0.25)
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DrawImage(nil, x, y, width, height)
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end
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-- draw dropdown bar
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if enabled then
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if (mOver or self.dropped) and mOverComp ~= "DROP" then
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SetDrawLayer(nil, 100)
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self:DrawTooltip(
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x, y - (self.dropped and self.dropUp and dropExtra or 0),
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width, height + (self.dropped and dropExtra or 0),
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viewPort,
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mOver and "BODY" or "OUT", self.selIndex, self.list[self.selIndex])
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SetDrawLayer(nil, 0)
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end
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SetDrawColor(1, 1, 1)
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else
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SetDrawColor(0.66, 0.66, 0.66)
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end
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-- draw selected label or search term
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local selLabel
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if self:IsSearchActive() then
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selLabel = "Search: " .. self:GetSearchTermPretty()
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else
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selLabel = self.list[self.selIndex]
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if type(selLabel) == "table" then
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selLabel = selLabel.label
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end
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end
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SetViewport(x + 2, y + 2, width - height, lineHeight)
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DrawString(0, 0, "LEFT", lineHeight, "VAR", selLabel or "")
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SetViewport()
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-- draw dropped down part with items
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if self.dropped then
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SetDrawLayer(nil, 5)
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self:DrawControls(viewPort)
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-- draw tooltip for hovered item
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local cursorX, cursorY = GetCursorPos()
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self.hoverSelDrop = mOver and not scrollBar:IsMouseOver() and math.floor((cursorY - dropY + scrollBar.offset) / lineHeight) + 1
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self.hoverSel = self:DropIndexToListIndex(self.hoverSelDrop)
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if self.hoverSel and not self.list[self.hoverSel] then
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self.hoverSel = nil
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end
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if self.hoverSel then
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SetDrawLayer(nil, 100)
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self:DrawTooltip(
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x, dropY + 2 + (self.hoverSelDrop - 1) * lineHeight - scrollBar.offset,
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width, lineHeight,
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viewPort,
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"HOVER", self.hoverSel, self.list[self.hoverSel])
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SetDrawLayer(nil, 5)
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end
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-- draw dropdown items
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SetViewport(x + 2, dropY + 2, scrollBar.enabled and width - 22 or width - 4, self.dropHeight)
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local dropIndex = 0
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for index, listVal in ipairs(self.list) do
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local searchInfo = self.searchInfos[index]
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-- skip filtered out items if search is active
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if not self:IsSearchActive() or searchInfo and searchInfo.matches then
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dropIndex = dropIndex + 1
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local y = (dropIndex - 1) * lineHeight - scrollBar.offset
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-- highlight background if hovered
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if index == self.hoverSel then
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SetDrawColor(0.5, 0.4, 0.3)
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DrawImage(nil, 0, y, width - 4, lineHeight)
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end
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-- highlight font color if hovered or selected
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if index == self.hoverSel or index == self.selIndex then
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SetDrawColor(1, 1, 1)
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else
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SetDrawColor(0.66, 0.66, 0.66)
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end
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-- draw actual item label with search match highlight if available
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local label = StripEscapes(type(listVal) == "table" and listVal.label or listVal)
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DrawString(0, y, "LEFT", lineHeight, "VAR", label)
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self:DrawSearchHighlights(label, searchInfo, 0, y, width - 4, lineHeight)
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end
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end
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SetDrawColor(1, 1, 1)
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if self:IsSearchActive() and self:GetMatchCount() == 0 then
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DrawString(0, 0 , "LEFT", lineHeight, "VAR", "<No matches>")
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end
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SetViewport()
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SetDrawLayer(nil, 0)
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end
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end
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function DropDownClass:OnChar(key)
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if not self:IsShown() or not self:IsEnabled() or not self.dropped then
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return
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end
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return self:OnSearchChar(key)
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end
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function DropDownClass:OnKeyDown(key)
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if not self:IsShown() or not self:IsEnabled() then
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return
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end
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if self.dropped then
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if self:OnSearchKeyDown(key) then
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return self
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end
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end
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local mOverControl = self:GetMouseOverControl()
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if mOverControl and mOverControl.OnKeyDown then
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self.selControl = mOverControl
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return mOverControl:OnKeyDown(key) and self
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else
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self.selControl = nil
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end
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if key == "LEFTBUTTON" or key == "RIGHTBUTTON" then
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local mOver, mOverComp = self:IsMouseOver()
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if not mOver or (self.dropped and mOverComp == "BODY") then
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self.dropped = false
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return self
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end
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if not self.dropped then
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self.dropped = true
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self:ScrollSelIntoView()
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end
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elseif key == "ESCAPE" then
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self.dropped = false
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end
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return self.dropped and self
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end
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function DropDownClass:OnKeyUp(key)
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if not self:IsShown() or not self:IsEnabled() then
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return
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end
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if self.selControl then
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local newSel = self.selControl:OnKeyUp(key)
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if newSel then
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return self
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else
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self.selControl = nil
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end
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return self
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end
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if key == "LEFTBUTTON" or key == "RIGHTBUTTON" then
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local mOver, mOverComp = self:IsMouseOver()
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if not mOver then
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self.dropped = false
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elseif mOverComp == "DROP" then
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local x, y = self:GetPos()
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local width, height = self:GetSize()
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local cursorX, cursorY = GetCursorPos()
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local dropExtra = self.dropHeight + 4
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local dropY = self.dropUp and y - dropExtra or y + height
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self:SetSel(math.floor((cursorY - dropY + self.controls.scrollBar.offset) / (height - 4)) + 1)
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self.dropped = false
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end
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elseif key == "WHEELDOWN" then
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if self.dropped and self.controls.scrollBar.enabled then
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self.controls.scrollBar:Scroll(1)
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else
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self:SetSel(self:ListIndexToDropIndex(self.selIndex, 0) + 1)
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end
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return self
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elseif key == "DOWN" then
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self:SetSel(self:ListIndexToDropIndex(self.selIndex, 0) + 1)
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self:ScrollSelIntoView()
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return self
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elseif key == "WHEELUP" then
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if self.dropped and self.controls.scrollBar.enabled then
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self.controls.scrollBar:Scroll(-1)
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else
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self:SetSel(self:ListIndexToDropIndex(self.selIndex, 0) - 1)
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end
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return self
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elseif key == "UP" then
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self:SetSel(self:ListIndexToDropIndex(self.selIndex, 0) - 1)
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self:ScrollSelIntoView()
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return self
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end
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return self.dropped and self
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end
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