PyQt 使用委托将图像从 QTableView 保存到 SQLite 数据库
PyQt Save Image from QTableView to SQLite DB using Delegate
我能够 select 目录中的图像并存储在指定的单元格中，但我不知道如何将其保存到数据库中。我按下回车键或 Tab 键，图像就消失了。
这是我目前使用的委托
class ImageDelegate(qtw.QStyledItemDelegate):
# def createEditor(self, parent, option, proxyModelIndex):
def createEditor(self, parent, option, index):
self.lbText = qtw.QLabel(parent)
self.lbText.setAlignment(qtc.Qt.AlignCenter)
self.printFileLoc = qtw.QFileDialog.getOpenFileName(parent, caption = 'Open Print', filter = '*.jpg')
self.lbPixmap = qtg.QPixmap(self.printFileLoc[0]) #[0] brings back path to image
self.lbText.setPixmap(self.lbPixmap.scaled(70,100, qtc.Qt.KeepAspectRatio))
return self.lbText
def setModelData(self, editor, model, index):
self.plants_model = qts.QSqlRelationalTableModel()
self.plants_model.setTable('plant_list')
self.plants_model.setData(index, self.lbText, qtc.Qt.EditRole)
这里是我使用委托实例的地方 class
self.imageDelegate = ImageDelegate()
self.plant_list.setItemDelegateForColumn(
self.plants_model.fieldIndex('photo'),
self.imageDelegate)
有什么想法吗？
**** 要求的最小可重现代码：
import sys, csv
from PyQt5 import QtWidgets as qtw
from PyQt5 import QtCore as qtc
from PyQt5 import QtGui as qtg
from PyQt5 import QtSql as qts
from PyQt5.QtPrintSupport import QPrintDialog, QPrinter, QPrintPreviewDialog
from PyQt5.Qt import QFileInfo
import sqlite3
from datetime import date
from PyQt5.QtGui import QPixmap
class DateDelegate(qtw.QStyledItemDelegate):
def createEditor(self, parent, option, proxyModelIndex):
date_inp = qtw.QDateEdit(parent, calendarPopup=True)
return date_inp
class ImageDelegate(qtw.QStyledItemDelegate):
def createEditor(self, parent, option, proxyModelIndex):
self.lbText = qtw.QLabel(parent)
self.lbText.setAlignment(qtc.Qt.AlignCenter)
self.printFileLoc = qtw.QFileDialog.getOpenFileName(parent, caption = 'Open Print', filter = '*.jpg')
self.lbPixmap = qtg.QPixmap(self.printFileLoc[0]) #[0] brings back path to image
self.lbText.setPixmap(self.lbPixmap.scaled(70,100, qtc.Qt.KeepAspectRatio))
return self.lbText
def setModelData(self, editor, model, index):
self.plants_model = qts.QSqlRelationalTableModel()
self.plants_model.setTable('plant_list')
self.plants_model.setData(index, self.lbText, qtc.Qt.EditRole)
class MainWindow(qtw.QMainWindow):
def __init__(self):
super().__init__()
self.gridLayout = qtw.QGridLayout()
self.mainW = qtw.QWidget()
self.mainW.setLayout(self.gridLayout)
self.setCentralWidget(self.mainW)
# Connect to the database
db = qts.QSqlDatabase.addDatabase('QSQLITE')
db.setDatabaseName('plants.db')
if not db.open():
qtw.QMessageBox.critical(
None, 'DB Connection Error',
'Could not open database file: '
f'{db.lastError().text()}')
sys.exit(1)
#CREATE MODELS FOR EACH SQL TABLE
self.zone_model = qts.QSqlTableModel()
self.zone_model.setTable('zones')
self.loc_model = qts.QSqlTableModel()
self.loc_model.setTable('loc_rec')
self.indoor_seed_model = qts.QSqlTableModel()
self.indoor_seed_model.setTable('indoor_seed')
self.soil_rec_model = qts.QSqlTableModel()
self.soil_rec_model.setTable('soil_rec')
self.plant_type_model = qts.QSqlTableModel()
self.plant_type_model.setTable('plant_type')
self.nick_name_model = qts.QSqlTableModel()
self.plant_type_model.setTable('nick_name')
self.plants_model = qts.QSqlRelationalTableModel()
self.plants_model.setTable('plant_list')
self.plants_model.setRelation(
self.plants_model.fieldIndex('nickname_id'),
qts.QSqlRelation('nick_name', 'id', 'veggies')
)
self.plants_model.setRelation(
self.plants_model.fieldIndex('ans_id'),
qts.QSqlRelation('indoor_seed', 'id', 'ans')
)
self.plants_model.setRelation(
self.plants_model.fieldIndex('zone_id'),
qts.QSqlRelation('zones', 'id', 'code')
)
self.plants_model.setRelation(
self.plants_model.fieldIndex('soil_id'),
qts.QSqlRelation('soil_rec', 'id', 'soil_type')
)
self.plants_model.setRelation(
self.plants_model.fieldIndex('p_type_id'),
qts.QSqlRelation('plant_type', 'id', 'p_type')
)
self.plants_model.setRelation(
self.plants_model.fieldIndex('location_id'),
qts.QSqlRelation('loc_rec', 'id', 'loc')
)
self.UIComps() # call the UI components method
def UIComps(self):
# set headers for main table
fieldnames = ['ID', "Year Planted", "Real Name", "Nick Name", "Description",
"Seed Plant Rec","Garden Plant Rec", "Plant Notes", "Comments",
"Days to Germ", "Days to Harv","Reco Spring Frost","Actual Spring Frost", "Seed Plant Rec", "Garden Plant Rec",
"Actual Seed Plant", "Actual Garden Plant", "Harvest Date Plan", "Actual Harvest Date",
"Photo", "Location", "Zone", "Seed Indoor?", "Soil Type", "Plant Type" ]
c = 0
for f in fieldnames:
self.plants_model.setHeaderData(c, qtc.Qt.Horizontal, (fieldnames[c]))
c += 1
self.plants_model.setEditStrategy(qts.QSqlTableModel.OnFieldChange)
self.plants_model.dataChanged.connect(print)
lbl2 = qtw.QLabel("View/Edit Plants", self)
lbl2.setFont(qtg.QFont("Helvetica", 25, 12))
self.gridLayout.layout().addWidget(lbl2, 6, 0,1,3, alignment=qtc.Qt.AlignCenter)
#PLANT LIST TABLE
self.plant_list = qtw.QTableView()
self.plant_list.setModel(self.plants_model)
self.gridLayout.layout().addWidget(self.plant_list, 7, 0, 2, 3)
self.plant_list.horizontalHeader().setSectionsClickable(True)
self.plant_list.horizontalHeader().setSortIndicatorShown(True)
self.plant_list.setSortingEnabled(True) # this makes table sortable
self.dateDelegate = DateDelegate()
self.plant_list.setItemDelegateForColumn(
self.plants_model.fieldIndex('seed_plant_date_reco'),
self.dateDelegate)
self.dateDelegate2 = DateDelegate()
self.plant_list.setItemDelegateForColumn(
self.plants_model.fieldIndex('garden_plant_date_reco'),
self.dateDelegate2)
self.dateDelegate3 = DateDelegate()
self.plant_list.setItemDelegateForColumn(
self.plants_model.fieldIndex('seed_plant_date_ac'),
self.dateDelegate3)
self.dateDelegate4 = DateDelegate()
self.plant_list.setItemDelegateForColumn(
self.plants_model.fieldIndex('garden_plant_date_ac'),
self.dateDelegate4)
self.dateDelegate5 = DateDelegate()
self.plant_list.setItemDelegateForColumn(
self.plants_model.fieldIndex('harvest_date_plan'),
self.dateDelegate5)
self.dateDelegate6 = DateDelegate()
self.plant_list.setItemDelegateForColumn(
self.plants_model.fieldIndex('harvest_date_ac'),
self.dateDelegate6)
self.dateDelegate7 = DateDelegate()
self.plant_list.setItemDelegateForColumn(
self.plants_model.fieldIndex('spring_frost_reco'),
self.dateDelegate7)
self.dateDelegate8 = DateDelegate()
self.plant_list.setItemDelegateForColumn(
self.plants_model.fieldIndex('spring_frost_ac'),
self.dateDelegate8)
#IMAGE INPUT
self.imageDelegate = ImageDelegate()
self.plant_list.setItemDelegateForColumn(
self.plants_model.fieldIndex('photo'),
self.imageDelegate)
self.plants_model.setEditStrategy(qts.QSqlTableModel.OnFieldChange)
self.plants_model.dataChanged.connect(print)
self.plants_model.select()
self.plant_list.setItemDelegate(qts.QSqlRelationalDelegate())
#adding toolbars
self.toolbar = self.addToolBar('Controls')
deleteCoffee = qtw.QAction(qtg.QIcon("close.png"), "Delete Record", self)
deleteCoffee.triggered.connect(self.delete_plant) #removes from table
self.toolbar.addAction(deleteCoffee )
addPlant = qtw.QAction(qtg.QIcon("add.png"), "Add A Plant", self)
addPlant.triggered.connect(self.add_plant)
self.toolbar.addAction(addPlant)
# SLOTS for Toolbar buttons
def delete_plant(self):
selected = self.plant_list.selectedIndexes()
for index in selected or []:
self.plants_model.removeRow(index.row())
self.plants_model.select()
self.countRecords()
def add_plant(self):
self.gridLayout.layout().addWidget(self.plant_list, 7, 0, 2, 3)
self.plants_model.insertRows(0, 1)
self.countRecords()#calls the countRecords() function
app = qtw.QApplication(sys.argv)
app.setStyle("fusion")
mw = MainWindow()
mw.setGeometry(10, 10, 1000, 750)
mw.show()
sys.exit(app.exec())
和数据库
CREATE TABLE zones (
id INTEGER PRIMARY KEY,
code TEXT NOT NULL UNIQUE
)
;
CREATE TABLE loc_rec (
id INTEGER PRIMARY KEY,
loc TEXT NOT NULL UNIQUE
)
;
CREATE TABLE indoor_seed (
id INTEGER PRIMARY KEY,
ans TEXT
)
;
CREATE TABLE soil_rec (
id INTEGER PRIMARY KEY,
soil_type TEXT
)
;
CREATE TABLE plant_type (
id INTEGER PRIMARY KEY,
p_type TEXT
)
;
CREATE TABLE nick_name (
id INTEGER PRIMARY KEY,
veggies TEXT NOT NULL
)
;
INSERT INTO nick_name(veggies) VALUES
('Artichoke'),
('Asparagus'),
('Bean Sprouts'),
('Brocoli'),
('Brussels sprouts'),
('Cabbage'),
('Cauliflower'),
('Celery'),
('Greens-Bok Choy'),
('Greens-Chard'),
('Greens-Dandelion'),
('Greens-Kale'),
('Greens-Spinach'),
('Herbs-Basil'),
('Herbs-Chamomile'),
('Herbs-Lavender'),
('Herbs-Oregano'),
('Herbs-Parsley'),
('Herbs-Rosemary'),
('Herbs-Sage'),
('Herbs-Thyme'),
('Lettuce-Iceberg'),
('Lettuce-Romaine'),
('Mushrooms'),
('Onions-Chives'),
('Onions-Leeks'),
('Onions-Onion'),
('Onions-Shallots'),
('Onions-Scallions'),
('Peas'),
('Peppers-Bell'),
('Peppers-Chili'),
('Peppers-Jalapeno'),
('Peppers-Habanero'),
('Peppers-Paprika'),
('Peppers-Tabasco'),
('Peppers-Cayenne'),
('Radicchio'),
('Root Vegatables-Beets'),
('Root Vegatables-Beetroot'),
('Root Vegatables-Carrot'),
('Root Vegatables-Ginger'),
('Root Vegatables-Parsnip'),
('Root Vegatables-Potato'),
('Root Vegatables-Rutabaga'),
('Root Vegatables-Radish'),
('Root Vegatables-Sweet Potato'),
('Root Vegatables-Turnip'),
('Sweetcorn'),
('Squashes-Acorn'),
('Squashes-Butternut'),
('Squashes-Banana'),
('Squashes-Cucumber'),
('Squashes-Pumpkin'),
('Squashes-Spaghetti'),
('Squashes-Zucchini'),
('Stevia'),
('Tomato'),
('Watercress'),
('Waxed Beans')
;
INSERT INTO zones(code) VALUES
('1a'), ('1b'),
('2a'), ('2b'),
('3a'), ('3b'),
('4a'), ('4b'),
('5a'), ('5b'),
('6a'), ('6b'),
('7a'), ('7b'),
('8a'), ('8b'),
('9a'), ('9b'),
('10a'), ('10b'),
('11a'), ('11b'),
('12a'), ('12b'),
('13a'), ('13b')
;
INSERT INTO loc_rec(loc) VALUES
('Walipini'),
('Garden'),
('Barrel'),
('Deck'),
('Office'),
('Kitchen')
;
INSERT INTO indoor_seed(ans) VALUES
('Yes'),
('No')
;
INSERT INTO soil_rec(soil_type ) VALUES
('Very Wet'),
('Wet'),
('Dry'),
('Very Dry')
;
INSERT INTO plant_type(p_type ) VALUES
('Indetermined'),
('Semi-Determined'),
('Determined')
;
CREATE TABLE plant_list(
id INTEGER PRIMARY KEY,
plant_year INTEGER NOT NULL,
real_name TEXT NOT NULL,
nickname_id INTEGER REFERENCES nick_name(id) ON UPDATE CASCADE,
fruit_desc TEXT ,
seed_plant_rec TEXT,
gard_plant_rec TEXT,
plant_notes TEXT,
comments TEXT,
germ_days INTEGER,
harv_days INTEGER,
spring_frost_reco DATE DEFAULT CURRENT_DATE,
spring_frost_ac DATE DEFAULT CURRENT_DATE,
seed_plant_date_reco DATE DEFAULT CURRENT_DATE,
garden_plant_date_reco DATE DEFAULT CURRENT_DATE,
seed_plant_date_ac DATE DEFAULT CURRENT_DATE,
garden_plant_date_ac DATE DEFAULT CURRENT_DATE,
harvest_date_plan DATE DEFAULT CURRENT_DATE,
harvest_date_ac DATE DEFAULT CURRENT_DATE,
photo BLOB,
location_id INTEGER REFERENCES location_rec(id) ON UPDATE CASCADE,
zone_id INTEGER REFERENCES zones(id) ON UPDATE CASCADE,
ans_id INTEGER REFERENCES indoor_seed (id) ON UPDATE CASCADE,
soil_id INTEGER REFERENCES soil_rec (id) ON UPDATE CASCADE,
p_type_id INTEGER REFERENCES plant_type (id) ON UPDATE CASCADE
)
;
逻辑是委托显示存储在角色中的内容，因此在这种情况下，您必须将文件（图像）的信息保存在角色中，然后使用该信息将其显示为居中图标：
class ImageDelegate(qtw.QStyledItemDelegate):
def createEditor(self, parent, option, index):
filename, _ = qtw.QFileDialog.getOpenFileName(
parent, caption="Open Print", filter="Image Files (*.png *.jpg *.bmp)"
)
if filename:
model = index.model()
file = qtc.QFile(filename)
if file.open(qtc.QIODevice.ReadOnly):
model.setData(index, file.readAll(), qtc.Qt.EditRole)
def initStyleOption(self, option, index):
super().initStyleOption(option, index)
pixmap = qtg.QPixmap()
if pixmap.loadFromData(index.data(qtc.Qt.EditRole)):
option.features &= ~qtw.QStyleOptionViewItem.HasDisplay
option.text = ""
option.features |= qtw.QStyleOptionViewItem.HasDecoration
option.icon = qtg.QIcon(pixmap)
option.decorationSize = pixmap.size() / pixmap.devicePixelRatio()
option.decorationAlignment = qtc.Qt.AlignCenter
我能够 select 目录中的图像并存储在指定的单元格中，但我不知道如何将其保存到数据库中。我按下回车键或 Tab 键，图像就消失了。
这是我目前使用的委托
class ImageDelegate(qtw.QStyledItemDelegate):
# def createEditor(self, parent, option, proxyModelIndex):
def createEditor(self, parent, option, index):
self.lbText = qtw.QLabel(parent)
self.lbText.setAlignment(qtc.Qt.AlignCenter)
self.printFileLoc = qtw.QFileDialog.getOpenFileName(parent, caption = 'Open Print', filter = '*.jpg')
self.lbPixmap = qtg.QPixmap(self.printFileLoc[0]) #[0] brings back path to image
self.lbText.setPixmap(self.lbPixmap.scaled(70,100, qtc.Qt.KeepAspectRatio))
return self.lbText
def setModelData(self, editor, model, index):
self.plants_model = qts.QSqlRelationalTableModel()
self.plants_model.setTable('plant_list')
self.plants_model.setData(index, self.lbText, qtc.Qt.EditRole)
这里是我使用委托实例的地方 class
self.imageDelegate = ImageDelegate()
self.plant_list.setItemDelegateForColumn(
self.plants_model.fieldIndex('photo'),
self.imageDelegate)
有什么想法吗？
**** 要求的最小可重现代码：
import sys, csv
from PyQt5 import QtWidgets as qtw
from PyQt5 import QtCore as qtc
from PyQt5 import QtGui as qtg
from PyQt5 import QtSql as qts
from PyQt5.QtPrintSupport import QPrintDialog, QPrinter, QPrintPreviewDialog
from PyQt5.Qt import QFileInfo
import sqlite3
from datetime import date
from PyQt5.QtGui import QPixmap
class DateDelegate(qtw.QStyledItemDelegate):
def createEditor(self, parent, option, proxyModelIndex):
date_inp = qtw.QDateEdit(parent, calendarPopup=True)
return date_inp
class ImageDelegate(qtw.QStyledItemDelegate):
def createEditor(self, parent, option, proxyModelIndex):
self.lbText = qtw.QLabel(parent)
self.lbText.setAlignment(qtc.Qt.AlignCenter)
self.printFileLoc = qtw.QFileDialog.getOpenFileName(parent, caption = 'Open Print', filter = '*.jpg')
self.lbPixmap = qtg.QPixmap(self.printFileLoc[0]) #[0] brings back path to image
self.lbText.setPixmap(self.lbPixmap.scaled(70,100, qtc.Qt.KeepAspectRatio))
return self.lbText
def setModelData(self, editor, model, index):
self.plants_model = qts.QSqlRelationalTableModel()
self.plants_model.setTable('plant_list')
self.plants_model.setData(index, self.lbText, qtc.Qt.EditRole)
class MainWindow(qtw.QMainWindow):
def __init__(self):
super().__init__()
self.gridLayout = qtw.QGridLayout()
self.mainW = qtw.QWidget()
self.mainW.setLayout(self.gridLayout)
self.setCentralWidget(self.mainW)
# Connect to the database
db = qts.QSqlDatabase.addDatabase('QSQLITE')
db.setDatabaseName('plants.db')
if not db.open():
qtw.QMessageBox.critical(
None, 'DB Connection Error',
'Could not open database file: '
f'{db.lastError().text()}')
sys.exit(1)
#CREATE MODELS FOR EACH SQL TABLE
self.zone_model = qts.QSqlTableModel()
self.zone_model.setTable('zones')
self.loc_model = qts.QSqlTableModel()
self.loc_model.setTable('loc_rec')
self.indoor_seed_model = qts.QSqlTableModel()
self.indoor_seed_model.setTable('indoor_seed')
self.soil_rec_model = qts.QSqlTableModel()
self.soil_rec_model.setTable('soil_rec')
self.plant_type_model = qts.QSqlTableModel()
self.plant_type_model.setTable('plant_type')
self.nick_name_model = qts.QSqlTableModel()
self.plant_type_model.setTable('nick_name')
self.plants_model = qts.QSqlRelationalTableModel()
self.plants_model.setTable('plant_list')
self.plants_model.setRelation(
self.plants_model.fieldIndex('nickname_id'),
qts.QSqlRelation('nick_name', 'id', 'veggies')
)
self.plants_model.setRelation(
self.plants_model.fieldIndex('ans_id'),
qts.QSqlRelation('indoor_seed', 'id', 'ans')
)
self.plants_model.setRelation(
self.plants_model.fieldIndex('zone_id'),
qts.QSqlRelation('zones', 'id', 'code')
)
self.plants_model.setRelation(
self.plants_model.fieldIndex('soil_id'),
qts.QSqlRelation('soil_rec', 'id', 'soil_type')
)
self.plants_model.setRelation(
self.plants_model.fieldIndex('p_type_id'),
qts.QSqlRelation('plant_type', 'id', 'p_type')
)
self.plants_model.setRelation(
self.plants_model.fieldIndex('location_id'),
qts.QSqlRelation('loc_rec', 'id', 'loc')
)
self.UIComps() # call the UI components method
def UIComps(self):
# set headers for main table
fieldnames = ['ID', "Year Planted", "Real Name", "Nick Name", "Description",
"Seed Plant Rec","Garden Plant Rec", "Plant Notes", "Comments",
"Days to Germ", "Days to Harv","Reco Spring Frost","Actual Spring Frost", "Seed Plant Rec", "Garden Plant Rec",
"Actual Seed Plant", "Actual Garden Plant", "Harvest Date Plan", "Actual Harvest Date",
"Photo", "Location", "Zone", "Seed Indoor?", "Soil Type", "Plant Type" ]
c = 0
for f in fieldnames:
self.plants_model.setHeaderData(c, qtc.Qt.Horizontal, (fieldnames[c]))
c += 1
self.plants_model.setEditStrategy(qts.QSqlTableModel.OnFieldChange)
self.plants_model.dataChanged.connect(print)
lbl2 = qtw.QLabel("View/Edit Plants", self)
lbl2.setFont(qtg.QFont("Helvetica", 25, 12))
self.gridLayout.layout().addWidget(lbl2, 6, 0,1,3, alignment=qtc.Qt.AlignCenter)
#PLANT LIST TABLE
self.plant_list = qtw.QTableView()
self.plant_list.setModel(self.plants_model)
self.gridLayout.layout().addWidget(self.plant_list, 7, 0, 2, 3)
self.plant_list.horizontalHeader().setSectionsClickable(True)
self.plant_list.horizontalHeader().setSortIndicatorShown(True)
self.plant_list.setSortingEnabled(True) # this makes table sortable
self.dateDelegate = DateDelegate()
self.plant_list.setItemDelegateForColumn(
self.plants_model.fieldIndex('seed_plant_date_reco'),
self.dateDelegate)
self.dateDelegate2 = DateDelegate()
self.plant_list.setItemDelegateForColumn(
self.plants_model.fieldIndex('garden_plant_date_reco'),
self.dateDelegate2)
self.dateDelegate3 = DateDelegate()
self.plant_list.setItemDelegateForColumn(
self.plants_model.fieldIndex('seed_plant_date_ac'),
self.dateDelegate3)
self.dateDelegate4 = DateDelegate()
self.plant_list.setItemDelegateForColumn(
self.plants_model.fieldIndex('garden_plant_date_ac'),
self.dateDelegate4)
self.dateDelegate5 = DateDelegate()
self.plant_list.setItemDelegateForColumn(
self.plants_model.fieldIndex('harvest_date_plan'),
self.dateDelegate5)
self.dateDelegate6 = DateDelegate()
self.plant_list.setItemDelegateForColumn(
self.plants_model.fieldIndex('harvest_date_ac'),
self.dateDelegate6)
self.dateDelegate7 = DateDelegate()
self.plant_list.setItemDelegateForColumn(
self.plants_model.fieldIndex('spring_frost_reco'),
self.dateDelegate7)
self.dateDelegate8 = DateDelegate()
self.plant_list.setItemDelegateForColumn(
self.plants_model.fieldIndex('spring_frost_ac'),
self.dateDelegate8)
#IMAGE INPUT
self.imageDelegate = ImageDelegate()
self.plant_list.setItemDelegateForColumn(
self.plants_model.fieldIndex('photo'),
self.imageDelegate)
self.plants_model.setEditStrategy(qts.QSqlTableModel.OnFieldChange)
self.plants_model.dataChanged.connect(print)
self.plants_model.select()
self.plant_list.setItemDelegate(qts.QSqlRelationalDelegate())
#adding toolbars
self.toolbar = self.addToolBar('Controls')
deleteCoffee = qtw.QAction(qtg.QIcon("close.png"), "Delete Record", self)
deleteCoffee.triggered.connect(self.delete_plant) #removes from table
self.toolbar.addAction(deleteCoffee )
addPlant = qtw.QAction(qtg.QIcon("add.png"), "Add A Plant", self)
addPlant.triggered.connect(self.add_plant)
self.toolbar.addAction(addPlant)
# SLOTS for Toolbar buttons
def delete_plant(self):
selected = self.plant_list.selectedIndexes()
for index in selected or []:
self.plants_model.removeRow(index.row())
self.plants_model.select()
self.countRecords()
def add_plant(self):
self.gridLayout.layout().addWidget(self.plant_list, 7, 0, 2, 3)
self.plants_model.insertRows(0, 1)
self.countRecords()#calls the countRecords() function
app = qtw.QApplication(sys.argv)
app.setStyle("fusion")
mw = MainWindow()
mw.setGeometry(10, 10, 1000, 750)
mw.show()
sys.exit(app.exec())
和数据库
CREATE TABLE zones (
id INTEGER PRIMARY KEY,
code TEXT NOT NULL UNIQUE
)
;
CREATE TABLE loc_rec (
id INTEGER PRIMARY KEY,
loc TEXT NOT NULL UNIQUE
)
;
CREATE TABLE indoor_seed (
id INTEGER PRIMARY KEY,
ans TEXT
)
;
CREATE TABLE soil_rec (
id INTEGER PRIMARY KEY,
soil_type TEXT
)
;
CREATE TABLE plant_type (
id INTEGER PRIMARY KEY,
p_type TEXT
)
;
CREATE TABLE nick_name (
id INTEGER PRIMARY KEY,
veggies TEXT NOT NULL
)
;
INSERT INTO nick_name(veggies) VALUES
('Artichoke'),
('Asparagus'),
('Bean Sprouts'),
('Brocoli'),
('Brussels sprouts'),
('Cabbage'),
('Cauliflower'),
('Celery'),
('Greens-Bok Choy'),
('Greens-Chard'),
('Greens-Dandelion'),
('Greens-Kale'),
('Greens-Spinach'),
('Herbs-Basil'),
('Herbs-Chamomile'),
('Herbs-Lavender'),
('Herbs-Oregano'),
('Herbs-Parsley'),
('Herbs-Rosemary'),
('Herbs-Sage'),
('Herbs-Thyme'),
('Lettuce-Iceberg'),
('Lettuce-Romaine'),
('Mushrooms'),
('Onions-Chives'),
('Onions-Leeks'),
('Onions-Onion'),
('Onions-Shallots'),
('Onions-Scallions'),
('Peas'),
('Peppers-Bell'),
('Peppers-Chili'),
('Peppers-Jalapeno'),
('Peppers-Habanero'),
('Peppers-Paprika'),
('Peppers-Tabasco'),
('Peppers-Cayenne'),
('Radicchio'),
('Root Vegatables-Beets'),
('Root Vegatables-Beetroot'),
('Root Vegatables-Carrot'),
('Root Vegatables-Ginger'),
('Root Vegatables-Parsnip'),
('Root Vegatables-Potato'),
('Root Vegatables-Rutabaga'),
('Root Vegatables-Radish'),
('Root Vegatables-Sweet Potato'),
('Root Vegatables-Turnip'),
('Sweetcorn'),
('Squashes-Acorn'),
('Squashes-Butternut'),
('Squashes-Banana'),
('Squashes-Cucumber'),
('Squashes-Pumpkin'),
('Squashes-Spaghetti'),
('Squashes-Zucchini'),
('Stevia'),
('Tomato'),
('Watercress'),
('Waxed Beans')
;
INSERT INTO zones(code) VALUES
('1a'), ('1b'),
('2a'), ('2b'),
('3a'), ('3b'),
('4a'), ('4b'),
('5a'), ('5b'),
('6a'), ('6b'),
('7a'), ('7b'),
('8a'), ('8b'),
('9a'), ('9b'),
('10a'), ('10b'),
('11a'), ('11b'),
('12a'), ('12b'),
('13a'), ('13b')
;
INSERT INTO loc_rec(loc) VALUES
('Walipini'),
('Garden'),
('Barrel'),
('Deck'),
('Office'),
('Kitchen')
;
INSERT INTO indoor_seed(ans) VALUES
('Yes'),
('No')
;
INSERT INTO soil_rec(soil_type ) VALUES
('Very Wet'),
('Wet'),
('Dry'),
('Very Dry')
;
INSERT INTO plant_type(p_type ) VALUES
('Indetermined'),
('Semi-Determined'),
('Determined')
;
CREATE TABLE plant_list(
id INTEGER PRIMARY KEY,
plant_year INTEGER NOT NULL,
real_name TEXT NOT NULL,
nickname_id INTEGER REFERENCES nick_name(id) ON UPDATE CASCADE,
fruit_desc TEXT ,
seed_plant_rec TEXT,
gard_plant_rec TEXT,
plant_notes TEXT,
comments TEXT,
germ_days INTEGER,
harv_days INTEGER,
spring_frost_reco DATE DEFAULT CURRENT_DATE,
spring_frost_ac DATE DEFAULT CURRENT_DATE,
seed_plant_date_reco DATE DEFAULT CURRENT_DATE,
garden_plant_date_reco DATE DEFAULT CURRENT_DATE,
seed_plant_date_ac DATE DEFAULT CURRENT_DATE,
garden_plant_date_ac DATE DEFAULT CURRENT_DATE,
harvest_date_plan DATE DEFAULT CURRENT_DATE,
harvest_date_ac DATE DEFAULT CURRENT_DATE,
photo BLOB,
location_id INTEGER REFERENCES location_rec(id) ON UPDATE CASCADE,
zone_id INTEGER REFERENCES zones(id) ON UPDATE CASCADE,
ans_id INTEGER REFERENCES indoor_seed (id) ON UPDATE CASCADE,
soil_id INTEGER REFERENCES soil_rec (id) ON UPDATE CASCADE,
p_type_id INTEGER REFERENCES plant_type (id) ON UPDATE CASCADE
)
;
逻辑是委托显示存储在角色中的内容，因此在这种情况下，您必须将文件（图像）的信息保存在角色中，然后使用该信息将其显示为居中图标：
class ImageDelegate(qtw.QStyledItemDelegate):
def createEditor(self, parent, option, index):
filename, _ = qtw.QFileDialog.getOpenFileName(
parent, caption="Open Print", filter="Image Files (*.png *.jpg *.bmp)"
)
if filename:
model = index.model()
file = qtc.QFile(filename)
if file.open(qtc.QIODevice.ReadOnly):
model.setData(index, file.readAll(), qtc.Qt.EditRole)
def initStyleOption(self, option, index):
super().initStyleOption(option, index)
pixmap = qtg.QPixmap()
if pixmap.loadFromData(index.data(qtc.Qt.EditRole)):
option.features &= ~qtw.QStyleOptionViewItem.HasDisplay
option.text = ""
option.features |= qtw.QStyleOptionViewItem.HasDecoration
option.icon = qtg.QIcon(pixmap)
option.decorationSize = pixmap.size() / pixmap.devicePixelRatio()
option.decorationAlignment = qtc.Qt.AlignCenter