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  • Committer: kobe
  • Date: 2015-02-13 07:37:10 UTC
  • Revision ID: xiangli@ubuntukylin.com-20150213073710-0jyp02ilyi5njj10
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component/cardwidget.py
 
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#!/usr/bin/python
 
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# -*- coding: utf-8 -*-
 
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### BEGIN LICENSE
 
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# Copyright (C) 2013 National University of Defense Technology(NUDT) & Kylin Ltd
 
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# Author:
 
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#     Shine Huang<shenghuang@ubuntukylin.com>
 
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# Maintainer:
 
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#     Shine Huang<shenghuang@ubuntukylin.com>
 
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# This program is free software: you can redistribute it and/or modify it
 
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# under the terms of the GNU General Public License version 3, as published
 
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# by the Free Software Foundation.
 
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#
 
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# This program is distributed in the hope that it will be useful, but
 
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# WITHOUT ANY WARRANTY; without even the implied warranties of
 
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# MERCHANTABILITY, SATISFACTORY QUALITY, or FITNESS FOR A PARTICULAR
 
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# PURPOSE.  See the GNU General Public License for more details.
 
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#
 
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# You should have received a copy of the GNU General Public License along
 
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# with this program.  If not, see <http://www.gnu.org/licenses/>.
 
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from PyQt4.QtGui import *
 
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from PyQt4.QtCore import *
 
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import sip
 
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from models.globals import Globals
 
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class CardWidget(QWidget):
 
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    cardcount = 0
 
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    number_per_row = -1
 
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    itemwidth = -1
 
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    itemheight = -1
 
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    def __init__(self, itemwidth, itemheight, cardspacing, parent=None):
 
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        QWidget.__init__(self, parent)
 
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        self.itemwidth = itemwidth
 
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        self.itemheight = itemheight
 
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        self.cardspacing = cardspacing
 
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        self.scrollArea = QScrollArea(self)
 
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        self.cardPanel = QWidget()
 
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        self.scrollArea.setWidget(self.cardPanel)
 
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        self.scrollArea.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
 
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        self.scrollArea.setVerticalScrollBarPolicy(Qt.ScrollBarAsNeeded)
 
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        self.verticalScrollBar().setStyleSheet("QScrollBar:vertical{margin:0px 0px 0px 0px;background-color:rgb(255,255,255,100);border:0px;width:6px;}\
 
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             QScrollBar::sub-line:vertical{subcontrol-origin:margin;border:1px solid red;height:13px}\
 
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             QScrollBar::up-arrow:vertical{subcontrol-origin:margin;background-color:blue;height:13px}\
 
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             QScrollBar::sub-page:vertical{background-color:#EEEDF0;}\
 
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             QScrollBar::handle:vertical{background-color:#D1D0D2;width:6px;} QScrollBar::handle:vertical:hover{background-color:#14ACF5;width:6px;}  QScrollBar::handle:vertical:pressed{background-color:#0B95D7;width:6px;}\
 
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             QScrollBar::add-page:vertical{background-color:#EEEDF0;}\
 
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             QScrollBar::down-arrow:vertical{background-color:yellow;}\
 
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             QScrollBar::add-line:vertical{subcontrol-origin:margin;border:1px solid green;height:13px}")
 
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    # calculate card number in one page in current screen resolution
 
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    def calculate_software_step_num(self):
 
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        number_per_row = (self.width() + self.cardspacing) / (self.itemwidth + self.cardspacing)
 
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        number_per_column = (self.height() + self.cardspacing) / (self.itemheight + self.cardspacing)
 
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        Globals.SOFTWARE_STEP_NUM = number_per_row * number_per_column + number_per_row
 
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        # print "re calculate SOFTWARE_STEP_NUM == ", Globals.SOFTWARE_STEP_NUM
 
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    # calculate data
 
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    def calculate_data(self):
 
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        # the 'QScrollArea' inside area is 1px smaller than 'QWidget', fix it.
 
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        self.scrollArea.setGeometry(-1, -1, self.width() + 2, self.height() + 2)
 
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        self.cardPanel.setGeometry(0, 0, self.width(), self.height())
 
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        self.number_per_row = (self.width() + self.cardspacing) / (self.itemwidth + self.cardspacing)
 
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    def reload_cards(self):
 
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        self.calculate_data()
 
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        cards = self.cardPanel.children()
 
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        self.cardcount = 0
 
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        for i in range(self.count()):
 
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            self.add_card(cards[i])
 
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        self.cardcount = self.count()
 
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    def add_card(self, card):
 
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        x = int(self.cardcount % self.number_per_row) * (self.itemwidth + self.cardspacing)
 
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        y = int(self.cardcount / self.number_per_row) * (self.itemheight + self.cardspacing)
 
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        # resize the widget to adapt items
 
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        nowHeight = y + self.itemheight
 
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        if(nowHeight >= self.cardPanel.height()):
 
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            self.cardPanel.resize(self.cardPanel.width(), nowHeight)
 
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        card.move(x, y)
 
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        self.cardcount = self.cardcount + 1
 
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    def verticalScrollBar(self):
 
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        return self.scrollArea.verticalScrollBar()
 
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    def scrollToTop(self):
 
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        vsb = self.scrollArea.verticalScrollBar()
 
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        vsb.setValue(0)
 
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    # count the cards
 
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    def count(self):
 
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        cards = self.cardPanel.children()
 
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        return len(cards)
 
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    # remove all item
 
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    def clear(self):
 
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        cards = self.cardPanel.children()
 
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        for card in cards:
 
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            sip.delete(card)
 
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        self.cardPanel.setGeometry(0, 0, self.width(), self.height())
 
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        self.cardcount = 0
 
 
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