Initial commit

.config/lite-xl/libraries/widget/dialog.lua

@@ -0,0 +1,163 @@
+--
+-- Dialog object that serves as base to implement other dialogs.
+-- @copyright Jefferson Gonzalez
+-- @license MIT
+--
+
+local core = require "core"
+local style = require "core.style"
+local Widget = require "libraries.widget"
+local Button = require "libraries.widget.button"
+local Label = require "libraries.widget.label"
+
+---@class widget.dialog : widget
+---@field protected title widget.label
+---@field protected close widget.button
+---@field protected panel widget
+local Dialog = Widget:extend()
+
+---Constructor
+---@param title string
+function Dialog:new(title)
+  Dialog.super.new(self)
+
+  self.type_name = "widget.dialog"
+
+  self.draggable = true
+  self.scrollable = false
+
+  -- minimum width and height
+  self.size.mx = 400
+  self.size.my = 150
+
+  self.title = Label(self, "")
+  self.close = Button(self, "")
+  self.close:set_icon("X")
+  self.close.border.width = 0
+  self.close:toggle_background(false)
+  self.close.padding.x = 4
+  self.close.padding.y = 0
+  self.panel = Widget(self)
+  self.panel.border.width = 0
+  self.panel.scrollable = true
+
+  local this = self
+
+  function self.close:on_click()
+    this:on_close()
+    this:hide()
+  end
+
+  self:set_title(title or "")
+end
+
+---Returns the widget where you can add child widgets to this dialog.
+---@return widget
+function Dialog:get_panel()
+  return self.panel
+end
+
+---Change the dialog title.
+---@param text string|widget.styledtext
+function Dialog:set_title(text)
+  self.title:set_label(text)
+end
+
+---Calculate the dialog size, centers it relative to screen and shows it.
+function Dialog:show()
+  Dialog.super.show(self)
+  self:update()
+  self:centered()
+end
+
+---Called when the user clicks the close button of the dialog.
+function Dialog:on_close()
+  self:hide()
+end
+
+function Dialog:update()
+  if not Dialog.super.update(self) then return false end
+
+  local width = math.max(
+    self.title:get_width() + (style.padding.x * 3) + self.close:get_width(),
+    self.size.mx,
+    self.size.x
+  )
+
+  local height = math.max(
+    self.title:get_height() + (style.padding.y * 3),
+    self.size.my,
+    self.size.y
+  )
+
+  self:set_size(width, height)
+
+  self.title:set_position(
+    style.padding.x / 2,
+    style.padding.y / 2
+  )
+
+  self.close:set_position(
+    self.size.x - self.close.size.x - (style.padding.x / 2),
+    style.padding.y / 2
+  )
+
+  self.panel:set_position(
+    0,
+    self.title:get_bottom() + (style.padding.y / 2)
+  )
+
+  self.panel:set_size(
+    self.size.x,
+    self.size.y - self.title.size.y - style.padding.y
+  )
+
+  return true
+end
+
+---We overwrite default draw function to draw the title background.
+function Dialog:draw()
+  if not self:is_visible() then return false end
+
+  Dialog.super.draw(self)
+
+  self:draw_border()
+
+  if self.background_color then
+    self:draw_background(self.background_color)
+  else
+    self:draw_background(
+      self.parent and style.background or style.background2
+    )
+  end
+
+  if #self.childs > 0 then
+    core.push_clip_rect(
+      self.position.x,
+      self.position.y,
+      self.size.x,
+      self.size.y
+    )
+  end
+
+  -- draw the title background
+  renderer.draw_rect(
+    self.position.x,
+    self.position.y,
+    self.size.x, self.title:get_height() + style.padding.y,
+    style.selection
+  )
+
+  for i=#self.childs, 1, -1 do
+    self.childs[i]:draw()
+  end
+
+  if #self.childs > 0 then
+    core.pop_clip_rect()
+  end
+
+  return true
+end
+
+
+return Dialog