268 lines
6.7 KiB
Lua
268 lines
6.7 KiB
Lua
-- @docclass
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UIMoveableTabBar = extends(UIWidget)
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-- private functions
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local function onTabClick(tab)
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tab.tabBar:selectTab(tab)
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end
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local function updateMargins(tabBar, ignored)
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if #tabBar.tabs == 0 then return end
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local currentMargin = 0
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for i = 1, #tabBar.tabs do
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tabBar.tabs[i]:setMarginLeft(currentMargin)
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currentMargin = currentMargin + tabBar.tabSpacing + tabBar.tabs[i]:getWidth()
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end
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end
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local function updateIndexes(tabBar, tab, xoff)
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local tabs = tabBar.tabs
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local currentMargin = 0
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local prevIndex = table.find(tabs, tab)
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local newIndex = prevIndex
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local xmid = xoff + tab:getWidth()/2
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for i = 1, #tabs do
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local nextTab = tabs[i]
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if xmid >= currentMargin + nextTab:getWidth()/2 then
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newIndex = table.find(tabs, nextTab)
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end
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currentMargin = currentMargin + tabBar.tabSpacing * (i - 1) + tabBar.tabs[i]:getWidth()
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end
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if newIndex ~= prevIndex then
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table.remove(tabs, table.find(tabs, tab))
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table.insert(tabs, newIndex, tab)
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end
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end
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local function getMaxMargin(tabBar, tab)
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if #tabBar.tabs == 0 then return end
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local maxMargin = 0
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for i = 1, #tabBar.tabs do
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if tabBar.tabs[i] ~= tab then
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maxMargin = maxMargin + tabBar.tabs[i]:getWidth()
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end
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end
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return maxMargin + tabBar.tabSpacing * (#tabBar.tabs- 1)
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end
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local function onTabMousePress(tab, mousePos, mouseButton)
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if mouseButton == MouseRightButton then
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if tab.menuCallback then tab.menuCallback(tab, mousePos, mouseButton) end
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return true
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end
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end
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local function onTabDragEnter(tab, mousePos)
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tab:raise()
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tab.hotSpot = mousePos.x - tab:getMarginLeft()
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tab.tabBar.selected = tab
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return true
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end
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local function onTabDragLeave(tab)
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updateMargins(tab.tabBar)
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tab.tabBar.selected = nil
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return true
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end
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local function onTabDragMove(tab, mousePos, mouseMoved)
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if tab == tab.tabBar.selected then
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local xoff = mousePos.x - tab.hotSpot
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-- update indexes
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updateIndexes(tab.tabBar, tab, xoff)
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updateIndexes(tab.tabBar, tab, xoff)
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-- update margins
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updateMargins(tab.tabBar)
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xoff = math.max(xoff, 0)
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xoff = math.min(xoff, getMaxMargin(tab.tabBar, tab))
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tab:setMarginLeft(xoff)
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end
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end
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local function tabBlink(tab, step)
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step = step or 0
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tab:setOn(not tab:isOn())
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removeEvent(tab.blinkEvent)
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if step < 4 then
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tab.blinkEvent = scheduleEvent(function() tabBlink(tab, step+1) end, 500)
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else
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tab:setOn(true)
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tab.blinkEvent = nil
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end
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end
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-- public functions
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function UIMoveableTabBar.create()
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local tabbar = UIMoveableTabBar.internalCreate()
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tabbar:setFocusable(false)
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tabbar.tabs = {}
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tabbar.selected = nil -- dragged tab
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tabbar.tabSpacing = 0
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tabbar.tabsMoveable = false
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return tabbar
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end
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function UIMoveableTabBar:setContentWidget(widget)
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self.contentWidget = widget
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if #self.tabs > 0 then
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self.contentWidget:addChild(self.tabs[1].tabPanel)
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end
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end
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function UIMoveableTabBar:setTabSpacing(tabSpacing)
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self.tabSpacing = tabSpacing
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updateMargins(self)
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end
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function UIMoveableTabBar:addTab(text, panel, menuCallback)
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if panel == nil then
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panel = g_ui.createWidget(self:getStyleName() .. 'Panel')
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panel:setId('tabPanel')
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end
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local tab = g_ui.createWidget(self:getStyleName() .. 'Button', self)
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panel.isTab = true
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tab.tabPanel = panel
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tab.tabBar = self
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tab:setId('tab')
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tab:setDraggable(self.tabsMoveable)
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tab:setText(text)
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tab:setWidth(tab:getTextSize().width + tab:getPaddingLeft() + tab:getPaddingRight())
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tab.menuCallback = menuCallback or nil
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tab.onClick = onTabClick
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tab.onMousePress = onTabMousePress
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tab.onDragEnter = onTabDragEnter
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tab.onDragLeave = onTabDragLeave
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tab.onDragMove = onTabDragMove
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tab.onDestroy = function() tab.tabPanel:destroy() end
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table.insert(self.tabs, tab)
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if #self.tabs == 1 then
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self:selectTab(tab)
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tab:setMarginLeft(0)
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else
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local newMargin = self.tabSpacing * (#self.tabs - 1)
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for i = 1, #self.tabs - 1 do
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newMargin = newMargin + self.tabs[i]:getWidth()
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end
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tab:setMarginLeft(newMargin)
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end
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return tab
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end
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-- Additional function to move the tab by lua
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function UIMoveableTabBar:moveTab(tab, units)
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local index = table.find(self.tabs, tab)
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if index == nil then return end
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local focus = false
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if self.currentTab == tab then
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self:selectPrevTab()
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focus = true
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end
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table.remove(self.tabs, index)
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local newIndex = math.min(#self.tabs+1, math.max(index + units, 1))
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table.insert(self.tabs, newIndex, tab)
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if focus then self:selectTab(tab) end
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updateMargins(self)
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return newIndex
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end
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function UIMoveableTabBar:onStyleApply(styleName, styleNode)
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if styleNode['moveable'] then
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self.tabsMoveable = styleNode['moveable']
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end
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end
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function UIMoveableTabBar:removeTab(tab)
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local index = table.find(self.tabs, tab)
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if index == nil then return end
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if self.currentTab == tab then
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self:selectPrevTab()
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end
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table.remove(self.tabs, index)
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if tab.blinkEvent then
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removeEvent(tab.blinkEvent)
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end
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tab:destroy()
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updateMargins(self)
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end
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function UIMoveableTabBar:getTab(text)
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for k,tab in pairs(self.tabs) do
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if tab:getText():lower() == text:lower() then
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return tab
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end
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end
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end
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function UIMoveableTabBar:selectTab(tab)
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if self.currentTab == tab then return end
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if self.contentWidget then
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local selectedWidget = self.contentWidget:getLastChild()
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if selectedWidget and selectedWidget.isTab then
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self.contentWidget:removeChild(selectedWidget)
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end
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self.contentWidget:addChild(tab.tabPanel)
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tab.tabPanel:fill('parent')
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end
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if self.currentTab then
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self.currentTab:setChecked(false)
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end
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signalcall(self.onTabChange, self, tab)
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self.currentTab = tab
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tab:setChecked(true)
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tab:setOn(false)
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tab.blinking = false
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local parent = tab:getParent()
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parent:focusChild(tab, MouseFocusReason)
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end
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function UIMoveableTabBar:selectNextTab()
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if self.currentTab == nil then return end
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local index = table.find(self.tabs, self.currentTab)
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if index == nil then return end
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local nextTab = self.tabs[index + 1] or self.tabs[1]
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if not nextTab then return end
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self:selectTab(nextTab)
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end
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function UIMoveableTabBar:selectPrevTab()
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if self.currentTab == nil then return end
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local index = table.find(self.tabs, self.currentTab)
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if index == nil then return end
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local prevTab = self.tabs[index - 1] or self.tabs[#self.tabs]
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if not prevTab then return end
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self:selectTab(prevTab)
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end
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function UIMoveableTabBar:blinkTab(tab)
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if tab:isChecked() then return end
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tab.blinking = true
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tabBlink(tab)
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end
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function UIMoveableTabBar:getTabPanel(tab)
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return tab.tabPanel
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end
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function UIMoveableTabBar:getCurrentTabPanel()
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if self.currentTab then
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return self.currentTab.tabPanel
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end
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end
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function UIMoveableTabBar:getCurrentTab()
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return self.currentTab
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end
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