tutorial.lua

   1 #!/usr/bin/lua
   2 --[[
   3
   4 Copyright (c) 2007-2008 Mauro Iazzi
   5
   6 Permission is hereby granted, free of charge, to any person
   7 obtaining a copy of this software and associated documentation
   8 files (the "Software"), to deal in the Software without
   9 restriction, including without limitation the rights to use,
  10 copy, modify, merge, publish, distribute, sublicense, and/or sell
  11 copies of the Software, and to permit persons to whom the
  12 Software is furnished to do so, subject to the following
  13 conditions:
  14
  15 The above copyright notice and this permission notice shall be
  16 included in all copies or substantial portions of the Software.
  17
  18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
  20 OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  21 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  22 HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  23 WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  24 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  25 OTHER DEALINGS IN THE SOFTWARE.
  26
  27 --]]
  28
  29
  30 while false do
  31   local i = QLabel.__index
  32   QLabel.__index = function (...) print('QLabel required', ...) return i(...) end
  33 end
  34
  35 if false then
  36 local i = QPushButton.__index
  37 QPushButton.__index = function (...) print(...) local ret = { i(...) } print(unpack(ret)) return unpack(ret) end
  38 end
  39
  40 qt = {
  41   slot = function(s) return '1'..tostring(s) end,
  42   signal = function(s) return '2'..tostring(s) end,
  43 }
  44
  45
  46 --app = QApplication.new()
  47
  48 --print'====='
  49 --print(app, app())
  50
  51 --QApplication.new = app
  52
  53
  54 --print( app )
  55 --print( pcall( app ) )
  56
  57 --[[
  58 QApplication.new = app
  59 --]]
  60
  61 --print( QApplication.new )
  62 --print( pcall( QApplication.new ) )
  63
  64
  65 app = QApplication.new()
  66 --print(app)
  67
  68
  69 mainwin = QWidget.new()
  70 --print(mainwin)
  71 mainwin:show()
  72
  73 layout = QVBoxLayout.new()
  74
  75 mainwin:setLayout(layout)
  76 mainwin:setWindowTitle'lqt test window'
  77
  78 te = QTextEdit.new()
  79 layout:addWidget(te)
  80 te:setToolTip'I\'m the Code Edit Box: I hold the code while you edit'
  81
  82 --[==[
  83 te:setPlainText[[
  84 but = QPushButton.new()
  85 but:show()
  86 but:connect(qt.signal'pressed()', but, qt.slot'close()')
  87 but:setText'Close Me!'
  88 but:resize(150, 50)
  89 but:setFont(QFont.new('Times', 18, 75))
  90 ]]
  91 --]==]
  92
  93 te:setPlainText[[
  94 buttons = buttons or {}
  95 i = #buttons + 1
  96
  97 but = QPushButton.new()
  98
  99 but:show()
 100 but:connect(qt.signal'pressed()', but, qt.slot'close()')
 101 but:setText'Close Me!'
 102 but:setWindowTitle('Button '..i)
 103 but:resize(180, 50)
 104 but:setFont(QFont.new('Times', 18, 75))
 105
 106 buttons[i] = but
 107
 108 return 'Created button '..i
 109
 110 ]]
 111 --te:show()
 112
 113 --print'----'
 114
 115 print'-----'
 116 pb = QPushButton.new()
 117 print'-----'
 118 layout:addWidget(pb)
 119 print'-----'
 120 pb:setText'Exec'
 121 print'-----'
 122 pb:setToolTip'I\'m the Exec button: push me to execute your code'
 123 print'-----'
 124 --pb:show()
 125
 126 quit = QPushButton.new()
 127 layout:addWidget(quit)
 128 quit:setText'Quit'
 129 quit:setToolTip'I\'m the Quit button: push me to close all windows'
 130
 131
 132 --pb:connect('2pressed()', SLOT(function() print 'lqt RULES!' end))
 133 --pb:connect('2pressed()', SLOT(function() print 'lqt ROCKS!' end))
 134
 135 results = QLabel.new()
 136 results:setToolTip'I\'m the result bar: I will show you your results and your errors'
 137 layout:addWidget(results)
 138
 139 pb:connect('2pressed()', SLOT(function()
 140   local f, err = loadstring(te:toPlainText())
 141   if f==nil then
 142     results:setText(err)
 143   else
 144     local res = { pcall( f ) }
 145     if res[1] then
 146       local string = ''
 147       for i, r in ipairs(res) do
 148         if i~=1 then string = string .. tostring(r) .. ', ' end
 149       end
 150       results:setText(string)
 151     else
 152       results:setText(res[2])
 153     end
 154   end
 155 end))
 156 quit:connect('2pressed()', app, '1closeAllWindows()')
 157
 158 app:exec()
 159
 160