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###############################################################################
#
# Copyright 2013 Stefan Schwarzburg <stefan.schwarzburg@gmail.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; version 3.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
###############################################################################
################################################################################
# Database
#
# local storage database. Can be found at (this changes quite
# often...)
# ~/.local/share/QtProject/QtQmlViewer/QML/OfflineStorage/Databases/
################################################################################
getDatabase = (name="qreator", version="0.1") ->
LocalStorage.openDatabaseSync name, version, "StorageDatabase", 100000
# make sure that all tables exist
initialize = () ->
db = getDatabase()
db.transaction (tx) -> tx.executeSql 'CREATE TABLE IF NOT EXISTS colors(colorid INTEGER PRIMARY KEY, themename TEXT, color TEXT, role TEXT, importance INT);'
db.transaction (tx) -> tx.executeSql 'CREATE TABLE IF NOT EXISTS settings(key TEXT UNIQUE, value TEXT);'
# run during import of this file to make sure that the database exists
initialize()
################################################################################
# Settings
#
# A set of basic functions to allow saving settings
#
# Settings are:
# "dottheme"
# "colortheme"
################################################################################
getSetting = (key) ->
db = getDatabase()
res = ""
db.transaction (tx) ->
rs = tx.executeSql 'SELECT value FROM settings WHERE key=?;', [key]
if rs.rows.length > 0
res = rs.rows[0].value
return res
setSetting = (key, value) ->
db = getDatabase()
db.transaction (tx) ->
rs = tx.executeSql 'INSERT OR REPLACE INTO settings VALUES (?,?);', [key, value]
################################################################################
# Color Themes
# all colormodels are in the database, since they require no code
# colormodels consist of a themename (e.g. basic, ubuntu,...), a role
# (foreground or background) and within each role an importance. It
# is up to the dot- and eye-themes to interpret the color theme and
# use the colors in a special way. The basic themes "rect" and
# "circle" only use one forground and one background color.
################################################################################
initializeColorModel = (modelID) ->
db = getDatabase()
noColors = true
db.transaction (tx) ->
rs = tx.executeSql 'SELECT count(*) as C FROM colors;'
noColors = not (rs.rows[0].C > 0)
if noColors
# in case there are no colors in the db, we provide a set of basic colors to start with
themes = [
["basic", "bg", "white", 0]
["basic", "fg", "black", 0]
["ubuntu", "bg", "white", 0]
["ubuntu", "bg", '#AEA79F', 1]
["ubuntu", "bg", '#DD4814', 2]
["ubuntu", "fg", "#DD4814", 0]
["ubuntu", "fg", '#333333', 1]
]
for line in themes
db.transaction (tx) ->
rs = tx.executeSql 'INSERT INTO colors VALUES (NULL,?,?,?,?);', [line[0], line[2], line[1], line[3]]
setSetting("dottheme", "1")
setSetting("colortheme", "ubuntu")
selectedtheme = getSetting("colortheme")
console.log(selectedtheme)
db.transaction (tx) ->
rs = tx.executeSql "SELECT DISTINCT themename FROM colors"
themes = (row.themename for row in rs.rows)
for themename in themes
modelID.append
"name": themename
"ident": themename
"ischecked": if selectedtheme is themename then true else false
"fgColor0": getColor(themename, "fg", 0)
"fgColor1": getColor(themename, "fg", 1)
"bgColor0": getColor(themename, "bg", 0)
"bgColor1": getColor(themename, "bg", 1)
updateColorModel = (modelID, index, ident, value) ->
modelID.setProperty(index, "ischecked", value)
for i in [0...modelID.count]
if i isnt index
modelID.setProperty(i, "ischecked", false)
getColor = (themename, role, importance) ->
db = getDatabase()
color = ""
db.transaction (tx) ->
rs = tx.executeSql 'SELECT * FROM colors WHERE themename=? AND role=? ORDER BY importance;', [themename, role]
if rs.rows.length > 0
try
color = rs.rows[importance].color
catch error
color = rs.rows[rs.rows.length - 1].color
return color
################################################################################
# Dot Themes
#
# Dot themes are supposed to draw the modules (or dots) in the QR
# code. They should result in scannable codes, but can play with the
# colors from the color theme and different shapes or images.
################################################################################
class DotTheme
constructor: (@qrCode, @colorThemeName="basic", @canvasSize=8*33, @boarderSize=2) ->
@pixelSize = @canvasSize / (@qrCode.getModuleCount() + 2 * @boarderSize)
draw: (@ctx) ->
@drawBackground()
@drawEyes()
for row in [0...@qrCode.getModuleCount()]
for col in [0...@qrCode.getModuleCount()]
@drawDot(row, col, (@boarderSize + col) * @pixelSize, (@boarderSize + row) * @pixelSize, @pixelSize, @pixelSize)
drawBackground: () ->
@ctx.fillStyle = getColor(@colorThemeName, "bg", 0)
@ctx.fillRect(0, 0, width, height)
drawEyes: () ->
drawDot: (row, col, x, y, width, height) ->
if @qrCode.isDark(row, col)
@ctx.fillStyle = getColor(@colorThemeName, "fg", 0)
else
@ctx.fillStyle = getColor(@colorThemeName, "bg", 0)
@ctx.fillRect(x, y, width, height)
class DotThemeCircle extends DotTheme
drawDot: (row, col, x, y, width, height) ->
if @qrCode.isDark(row, col)
@ctx.fillStyle = getColor(@colorThemeName, "fg", 0)
else
@ctx.fillStyle = getColor(@colorThemeName, "bg", 0)
@ctx.beginPath()
@ctx.arc(x + width/2, y + height/2, width/2, 0, 2 * Math.PI, false)
@ctx.fill()
# FIXME: there should be an automatic way to register classes
DotThemes =
1:
name: i18n.tr("Rectangle")
ident: "rect"
cl: DotTheme
2:
name: i18n.tr("Circle")
ident: "circle"
cl: DotThemeCircle
initializeDotThemeModel = (modelID) ->
console.log("initializeDotThemeModel")
for id, theme of DotThemes
modelID.append("name": theme.name, "ident": theme.ident, "id": id)
###############################################################################
# Drawing a QR code
#
# Select the current dot-, eye-, and color-theme in order to draw the
# given text. The QR code version (its size) can range from 1 to 40
# (in the modified qrcode.js file) and is automatically adapted to
# include all given data.
###############################################################################
drawQrCode = (textdata, QRCodeVersion = 1, QRErrorCorrectLevel = 'M') ->
try
qr = QrCode.qrcode(QRCodeVersion, QRErrorCorrectLevel)
qr.addData(textdata)
qr.make()
catch error
# FIXME this is too slow, we should calculate the required code version
if error.name is "QRcodeVersionError"
drawQrCode(textdata, QRCodeVersion + 1, QRErrorCorrectLevel)
else
console.debug(error.name + ": " + error.message)
return
ctx = qrcanvas.getContext('2d')
# the currently selected DotTheme and ColorTheme are taken from
# the settings values in the database
theme = new DotThemes[getSetting("dottheme")].cl(qr, getSetting("colortheme"))
theme.draw(ctx)
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