Use of Tkinter in Python (appropriate event collation) (ii)

1, fonts (font)

General format: (' Times-10 bold ')

(' Times ', ten, ' bold ', ' italic ') in turn, indicate font, font size, bold, italic

2, the use of pictures (image)

Photo=photoimage (file= ' path.gif ')

Canvas = Canvas.create_image (Image=photo)

Tkinter only supports a few other formats, such as GIF and BMP, you want to insert other format pictures you need to import Pil;pip install a Third-party class library pillow

From PIL import image,imagetk

Source=image.open (' path.jpg ')

Photo=imagetk.photoimage (source)

3. Data Container

Using the set and get methods to pass values and values,

Stringvar (): Character type

Booleanvar (): Boolean type

Intvar (): Integer type

Doublevar (): Floating-point type

4. Data binding: (Transfer value)

Entry, Text, Laber, Button,Radiobutton, Checkbutton: using textvariable to receive or display variable text

Entryvalue = Stringvar ()

Entry = entry (Textvariable=entryvalue) entryvalue.get () #输出接收的值

5. Data binding: (Association)

Radiobutton,checkbutton: Using value (values of component association variables), variable (variables associated with the component)

Rbvalue = Intvar ()

RB1 = Radiobutton (text= "Red", Variable=rbvalue,value=1,command=func)

6. Bind event bind (sequence,func,add) bind_class (classname,sequence,func,add) bind_all (sequence, Func,add)

For a button component, a menu component, and so on, you can specify its event handler function by using the command parameter when you create a component. method is bind, or the Bind_class method is used to bind the class, and the Bind_all method binds all component events to the event response function.

Event Parameters:

Event Parameters:	Sequence	The event that is bound;
	Func	The event handler function that is bound, that is, the response event;
	Add	Optional parameter, null character or ' + ';
	ClassName	The class that is bound;

7, mouse keyboard events

<Button-1> left mouse button press, 2 for the middle key, 3 for the right key;

<ButtonPress-1> ditto;

<ButtonRelease-1> left mouse button release;

<B1-Motion> Press and hold the left mouse button to move;

<Double-Button-1> double click left;

<Enter> mouse pointer into a component area;

<Leave> mouse pointer leaves a component area;

<MouseWheel> rolling wheel;

<KeyPress-A> Press a key, a can be replaced by other keys;

<Alt-KeyPress-A> Press ALT and A;alt at the same time to use CTRL and Shift instead;

<Double-KeyPress-A> Quick Press A two;

<Lock-KeyPress-A> in capital State press A;

<Key> refers to any keyboard keys,

8. Window Events

Activate triggers when the component is converted from unavailable to available;

Configure is triggered when the size of the component changes;

Deactivate triggers when the component is converted from usable to unavailable;

Destroy is triggered when the component is destroyed;

The expose is triggered when the component is exposed from the occluded state;

Unmap triggers when the component is changed from a display state to a hidden state;

MAP triggers when the component changes from a hidden state to a display state;

Focusin triggers when the component gets focus;

Focusout triggers when the component loses focus;

Property is triggered when a form's properties are deleted or changed;

Visibility triggers when the component becomes visible;

9. Responding to Events

The API for the event object (Def func (event)):

	Char	Returns the key character, valid only for keyboard events;
	KeyCode	Returns the key encoding, which is only valid for keyboard events;
	Keysym	Returns the key name, valid only for keyboard events;
	Num	mouse button, only the mouse event is valid;
	Type	The type of event that is triggered;
	Widgets	The component that caused the event;
	Width,heigh	The size of the component changed, only configure valid;
	X,y	Returns the current position of the mouse, relative to the window;
	X_root,y_root	Returns the current position of the mouse, relative to the entire screen