我正在使用带有Tkinter的Python GUI。我试图将BMP图像中的四个指定点位置保存到变量中,并创建一个或多或少通过保存点的最佳拟合椭圆。我仍然是一名初学者,使用Tkinter和GUI工作,所以请耐心等待我!
到目前为止,代码能够标记点并打印出它的位置/坐标。我应该在这种情况下使用matplotlib吗?我能够使用w / tkinter吗?
这是我的代码:
private string originalName;
public void cc()
{
cbBname.Items.Clear();
SqlCommand cmd = new SqlCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "select * from BkhurData";
db.ExeNonQuery(cmd);
DataTable dt = new DataTable();
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(dt);
foreach (DataRow dr in dt.Rows)
{
cbBname.Items.Add(dr["Name"].ToString());
originalName = dr["Name"].ToString()
}
}
private void BkhurUpdate_Click(object sender, EventArgs e)
{
SqlCommand cmd = new SqlCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "update BkhurData set Name='" + tbBpname.Text + "',Details='" + tbBpdetails.Text + "',Price='" + tbBpprice.Text + "',Size='" + tbBpsize.Text + "', Quantity ='"+tbBpquantity.Text+"' where Name = '" + originalName+ "'";
db.ExeNonQuery(cmd);
tbBpname.Text = "";
tbBpdetails.Text = "";
tbBpprice.Text = "";
tbBpsize.Text = "";
tbBpquantity.Text = "";
cc();
MessageBox.Show("updated successfully");
}
答案 0 :(得分:1)
这是你可以玩的东西和微调,但我认为这将接近你想要做的事情。
首先我创建了标有Create Ellipse
的其他菜单项,该菜单项链接到一个方法来计算左上方的绳索和右下方的绳索,然后使用create_ovel()
命令在屏幕上创建一个椭圆。如果这与您想要做的很接近,请告诉我。
下面的新方法会将每个元组的值与基本元组进行比较,如果数字较低,则会更改左上方的线,如果数字很高,则会更改右下方的线。通过计算出这两组绳索,它将创建一个大致适合您所选择的椭圆。
def createEllipse(self):
top_left_cords = self.pos[0]
bottom_right_cords = self.pos[0]
for pos in self.pos:
if pos[0] < top_left_cords[0]:
top_left_cords = (pos[0], top_left_cords[1])
if pos[1] < top_left_cords[1]:
top_left_cords = (top_left_cords[0], pos[1])
if pos[0] > bottom_right_cords[0]:
bottom_right_cords = (pos[0], bottom_right_cords[1])
if pos[1] > bottom_right_cords[1]:
bottom_right_cords = (bottom_right_cords[0], pos[1])
以下是完整代码:
from tkinter import *
from PIL import Image, ImageTk
class Window(Frame):
def __init__(self, master=None):
Frame.__init__(self, master)
self.master = master
self.pos = []
self.master.title("GUI")
self.pack(fill=BOTH, expand=1)
self.counter = 0
menu = Menu(self.master)
self.master.config(menu=menu)
file = Menu(menu)
file.add_command(label="Exit", command=self.client_exit)
menu.add_cascade(label="File", menu=file)
analyze = Menu(menu)
analyze.add_command(label="Region of Interest",command=self.regionOfInterest)
analyze.add_command(label="Erase", command=self.erasePoints)
analyze.add_command(label="Create Ellipse", command=self.createEllipse)
menu.add_cascade(label="Analyze", menu=analyze)
load = Image.open("./Colors/1.png")
render = ImageTk.PhotoImage(load)
img = Label(self, image=render)
img.image = render
img.place(x=0, y=0)
def createEllipse(self):
top_left_cords = self.pos[0]
bottom_right_cords = self.pos[0]
for pos in self.pos:
if pos[0] < top_left_cords[0]:
top_left_cords = (pos[0], top_left_cords[1])
if pos[1] < top_left_cords[1]:
top_left_cords = (top_left_cords[0], pos[1])
if pos[0] > bottom_right_cords[0]:
bottom_right_cords = (pos[0], bottom_right_cords[1])
if pos[1] > bottom_right_cords[1]:
bottom_right_cords = (bottom_right_cords[0], pos[1])
print(top_left_cords, bottom_right_cords)
canvas.create_oval(top_left_cords, bottom_right_cords)
def regionOfInterest(self):
root.config(cursor="plus")
canvas.bind("<Button-1>", self.imgClick)
def erasePoints(self):
self.pos = []
def client_exit(self):
exit()
def imgClick(self, event):
if self.counter < 4:
x = canvas.canvasx(event.x)
y = canvas.canvasy(event.y)
self.pos.append((x, y))
print(self.pos)
canvas.create_line(x - 5, y, x + 5, y, fill="red",
tags="crosshair")
canvas.create_line(x, y - 5, x, y + 5, fill="red",
tags="crosshair")
self.counter += 1
else:
canvas.unbind("<Button 1>")
root.config(cursor="arrow")
self.counter = 0
root = Tk()
imgSize = Image.open("./Colors/1.png")
tkimage = ImageTk.PhotoImage(imgSize)
w, h = imgSize.size
canvas = Canvas(root, width=w, height=h)
canvas.create_image((w/2,h/2),image=tkimage)
canvas.pack()
root.geometry("%dx%d"%(w,h))
app = Window(root)
root.mainloop()
这是我用于测试的样本图像之前和之后。
在:
后: