button

问题 I don't think this is a coding issue, but I would be grateful for some clues. I have some code which turns Tkinter Buttons green or red as they control relays. This works fine on my RaspberryPi but I cannot get any Button background colour except white on my code writing machine a MacPro. I am running Python 3.7.3 and Pycharm 2019.3.4 on both. Raspberian (latest release can’t remember version number) and OSX 10.15.4 on the Mac. When I run from Pycharm, colour can be set for the Window

问题 my question is if it is possible to put a cooldown on a button that the user presses, or to only register like 1 press in 2 seconds. I am using React Native (Expo) connected with a REST API and a PostgreSQL DB. My problem is that I have a Button that sends data to a Database. OnPress the entered Values are PUT to the database and the User gets navigated to another Screen where he can see his entry. I noticed that when a user is fast enought he can press the button twice or 3 times and

问题 This question already has answers here : Implement double click for button in Android (7 answers) Closed 1 year ago . Please help How to handle the double click on event OnClicklistener on the button, Cardview or others, 回答1: Please try below:- Java Version:- private var doubleClickLastTime = 0L view.setOnClickListener { if(System.currentTimeMillis() - doubleClickLastTime < 300){ doubleClickLastTime = 0 doAction() }else{ doubleClickLastTime = System.currentTimeMillis() } } Kotlin Version:-

问题 I have a button that has an orange background. But on pressing the button the colour does not remain the same. It changes to its default colour. And on release of button I get back the same colour. Is it possible to change the colour of the button while the button is being pressed? My code is: b = Button(frame1, text='Quit', command=quit_func) b.grid(row=6,column=4,pady=5,padx=10) b.config( background="darkorange1", foreground="white") 回答1: Button widget takes activebackground and

问题 I have a JSP page which includes a button called "Download".I want to hide this button based on a if-condition. The Download button is meant to generate and download PDF onclick of it. I have a List that is being fetched from the Controller and if this list is empty, I want to hide the "Download" button on the JSP page. This is my button, <button type="button" class="btn bg-red waves-effect" onclick="ExportPdf()">Download</button> I want to hide the button if the List is empty. 回答1: Display

问题 I have four ImageButtons in a row, all separated by (what seems to be) blank space. This blank space also however acts as a button (up to the halfway point between the two Buttons' entire section allocated for the Image) ''' FloatLayout: canvas: Color: rgb: utils.get_color_from_hex("#0a5a97") Rectangle: size: self.size pos: self.pos pos_hint: {"top":0.125,"right":1} size_hint: 1,.125 ImageButton: source: "Icons5/040-user.png" pos_hint: {"top":0.95,"right":1} size_hint: .3,.7 on_release: print

问题 i just have a simple question, but unfotunately Iwas not able to figure this one out on my own. I want to position a Floating Button at the top left corner of a parent relative layout. The center of the Floating Button shall be centered at the top edge of my parent layout. Thx in advance. XML: <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:orientation="horizontal" android:padding="75dp"> <LinearLayout android

问题 I have a Python GUI which makes a simple calculation. Running the main file called gui.py opens up a graphical interface. I would like to open the graphical interface and automatically click on the Kjør beregning button . (it means "Run calculation" in norwegian). Button is defined the following way in gui.py : beregn_btn = tk.Button(av_beregn, text="Kjør beregning", font=bold, command=self._beregn) I'd like to add some code here to invoke calculation, if that is possible: So far without luck

问题 I have a Python GUI which makes a simple calculation. Running the main file called gui.py opens up a graphical interface. I would like to open the graphical interface and automatically click on the Kjør beregning button . (it means "Run calculation" in norwegian). Button is defined the following way in gui.py : beregn_btn = tk.Button(av_beregn, text="Kjør beregning", font=bold, command=self._beregn) I'd like to add some code here to invoke calculation, if that is possible: So far without luck

问题 This question already has answers here : How to detect click/touch events on UI and GameObjects (4 answers) Closed 1 year ago . I have a UI button. I want to show a text when the user is pressing the button and hide the text when the user releases the button. How can I do this? 回答1: You have to create your own custom button by extending Button class and override method OnPoiterDown and OnPointerUp. Attach MyButton component instead of Button to your gameobject using UnityEngine; using