问题描述
下午好，我使用的是switch结构，但是我不知道如何在case运算符之后正确编写其他值。
在displayData代码的开关结构中，我为这些字段分配命令编号，例如：Vin = cp5.addTextlabel，以便以后通过com端口连接时，通过发送此命令显示或更改数据在Vin = cp5.addTextlabel字段中输入命令“ 60”，123。
仅适用于（分钟= cp5.addButton）-10，（葡萄酒= cp5.addTextlabel）-60， （inputPULI = cp5.addNumberBox）-40，（inputNapryzenieKV = cp5.addNumberBox）-70
下面是主要错误（函数“ setText（String）”未定义。请参见屏幕截图。
如何解决此问题并正确编写？
ImageButton按钮；
RadioButton CheckBoxuvum; Documentation
复选框P4； Documentation
请参阅GUI文件！
任务：
ImageButton（按钮）-20，目标是通过终端或微控制器发送命令来在窗口中更改图片。
P4 = cp5.addCheckBox-30 CHECK，目标是通过终端或微控制器发送命令来改变窗口中复选框的状态。
CheckBoxuvum = cp5.addRadioButton-50 +/-，目标是通过终端或微控制器发送命令，以更改窗口中复选框的状态（+/-）。
将来，我计划通过com端口从终端发送命令，以接收窗口中这些值的数据状态变化。
错误的屏幕截图：
Com_Interface1：
import processing.serial.*;
import controlP5.*;
ControlP5 cp5;
DropdownList serialPortsList;
Serial serialPort;
final int BAUD_RATE = 115200;
char parity = 'N';
int dataBits = 8;
float stopBits = 1.0;
public void setup() {
size(700,420,JAVA2D);
surface.setTitle("TEST");
surface.setResizable(false);
setupUI();
smooth();
frameRate(30);
writeOutgioing[lengthmas-1]=1;
String[] portNames = Serial.list();
//serialPort.clear(); // Why does not it work?
for (int i = 0; i < portNames.length; i++) serialPortsList.addItem(portNames[i],i);
}
public void toplug (int theValue) { // Start button on click sends a commad 1.
println("Button click events: "+theValue);
strata =!strata;
if (!strata) {
connection.setLabel("Пуск");
} else {
connection.setLabel("СТОП");
serialports((int)serialPortsList.getValue());
writeOutgioing[0]=1;
writeOut();
}
}
public void serialports(int theValue) {
try {
serialPort = new Serial(this,Serial.list()[theValue],BAUD_RATE,parity,dataBits,stopBits);
serialPort.bufferUntil('\n');
println("COM connected: "+ Serial.list()[theValue] );
/*Send.unlock();
connection.unlock();*/ //locking buttons in applications if not connected via rs-232.
}
catch(Exception e) {
System.err.println("Error opening serial port" + Serial.list()[theValue]);
e.printstacktrace();
}
}
显示数据：
void displaydata() {
switch(readIncome[0]) {
case 10:
minutess.setCaptionLabel(readIncome[1]+" Мин1.");
min1=readIncome[1];
break;
case 20:
// What to write?
// label(readIncome[1]+" Мин."); // ImageButton
// min=readIncome[1];
break;
case 30:
// What to write?
// P4.setText("std2"+readIncome[1] ); // CheckBox
break;
case 40:
inputPULI.setLabel("Bullet - "+readIncome[1] );
break;
case 70:
inputNapryzenieKV.setLabel("Voltage - "+readIncome[1] );
break;
case 60:
Vin.setText("Voltage K.V - "+readIncome[1] );
break;
case 50:
// What to write?
// CheckBoxuvum.setText("UV/UM - "+readIncome[1] ); // RadioButton
break;
default:
println("displayData(): no case selected.");
break; // technically not necessary,but I like my switches tidy
}
}
GUI：
int min1 = 0;
int PUL;
float NapryzenieKV;
boolean strata=false;
Button minutess;
ImageButton button;
NumberBox inputPULI;
NumberBox inputNapryzenieKV;
RadioButton CheckBoxuvum;
CheckBox P4;
Textlabel Vin;
Button connection;
Button Send;
public void setupUI()
{
cp5 = new ControlP5(this);
PFont fontn = createFont("Times New Roman",18);
PFont p = createFont("Times New Roman",18);
ControlFont font=new
ControlFont(p);
cp5.setFont(font);
connection = cp5.addButton("toplug")
.setCaptionLabel("ПУСК")
.setPosition(387,30)
.setSize(150,30);
serialPortsList = cp5.addDropdownList("Порт")
.setPosition(130,200)
.setItemHeight(30)
.setBarHeight(30);
minutess = cp5.addButton("minutesss")
.setCaptionLabel("ВЫКЛ")
.setPosition(145,100)
.setSize(90,25);
Send = cp5.addButton("toapply")
.setCaptionLabel("Apply")
.setPosition(510,370)
.setSize(150,30);
Vin = cp5.addTextlabel("naprazhenie kondencatora")
.setText("Voltage K.V")
.setFont(p)
.setColor(color(#00ffff))
.setPosition(45,320);
CheckBoxuvum = cp5.addRadioButton("UV/UM")
.setPosition(155,360)
.setSize(15,15)
.setColorActive(color(255))
.setItemsPerRow(2)
.setSpacingColumn(85)
.addItem("+",1)
.addItem("-",2);
P4 = cp5.addCheckBox("std2")
.setPosition(150,190)
.setSize(15,15)
.setItemsPerRow(1)
.setSpacingColumn(30)
.setSpacingRow(20)
.addItem("Check",2);
inputPULI = cp5.addNumberBox("PUL")
.setLabel("Bullet")
.setPosition(150,220)
.setSize(80,30)
.setColorValue(0xffffff00)
.setFont(p)
.setScrollSensitivity(1.1)
.setDirection(Controller.HORIZONTAL)
.setRange(1,199)
.setValue(3);
Label labelinputPULI = inputPULI.getCaptionLabel();
labelinputPULI.setFont(font);
labelinputPULI.setColor(color(#00ffff));
labelinputPULI.toupperCase(false);
labelinputPULI.setText("Пуль");
labelinputPULI.align(ControlP5.LEFT_OUTSIDE,CENTER);
labelinputPULI.getStyle().setPaddingLeft(-55);
inputNapryzenieKV = cp5.addNumberBox("NapryzenieKV")
.setLabel("Voltage")
.setPosition(150,270)
.setSize(80,30)
.setColorValue(0xffffff00)
.setFont(p)
.setScrollSensitivity(1.1)
.setMin(25)
.setMax(99)
.setMultiplier(0.01)
.setDirection(Controller.HORIZONTAL)
.setValue(25);
Label labelinputNapryzenieKV = inputNapryzenieKV.getCaptionLabel();
labelinputNapryzenieKV.setFont(font);
labelinputNapryzenieKV.setColor(color(#00ffff));
labelinputNapryzenieKV.toupperCase(false);
labelinputNapryzenieKV.setText("Напряжение");
labelinputNapryzenieKV.align(ControlP5.LEFT_OUTSIDE,CENTER);
labelinputNapryzenieKV.getStyle().setPaddingLeft(-45);
textFont(fontn);
{
// button dimensions
int w = 99;
int h = 25;
// test with generated images
button = new ImageButton(140,140,w,h,new PImage[]{
getimage(w,color(192,32 * 2)),// off
getimage(w,color(0,32 * 3)),// 10
getimage(w,32 * 4)),// 20
getimage(w,32 * 5)),// 30
getimage(w,32 * 6)),// 40
getimage(w,32 * 7)),// 50
getimage(w,32 * 8)),// 60
});
}
}
void mousepressed() {
button.mousepressed(mouseX,mouseY);
println(button.min);
}
// test images to represent loaded state images
PImage getimage(int w,int h,int c) {
PImage img = createImage(w,RGB);
java.util.Arrays.fill(img.pixels,c);
img.updatePixels();
return img;
}
// make a custom image button class
class ImageButton {
// minutes is the data it stores
int min = 0;
// images for each state
PImage[] stateImages;
// which image to display
int stateIndex;
// position
int x,y;
// dimensions: width,height
int w,h;
// text to display
String label = "ВЫКЛ";
ImageButton(int x,int y,int w,PImage[] stateImages) {
this.x = x;
this.y = y;
this.w = w;
this.h = h;
this.stateImages = stateImages;
}
void mousepressed(int mx,int my) {
// check the cursor is within the button bounds
boolean isOver = ((mx >= x && mx <= x + w) && // check horizontal
(my >= y && my <= y + h) ); // check vertical
if (isOver) {
min += 10;
stateIndex++;
if (min>60) {
min = 0;
stateIndex = 0;
label = "ВЫКЛ";
} else {
label = (str(min) + "Мин");
}
}
}
void draw() {
// if the images and index are valid
if (stateImages != null && stateIndex < stateImages.length) {
image(stateImages[stateIndex],x,y,h);
} else {
println("error displaying button state image");
println("stateImages: ");
printArray(stateImages);
println("stateIndex: " + stateIndex);
}
// display text
text(label,x + 17,y + h - 8);
}
}
public void minutesss() {
min1 += 10;
if (min1>60) {
min1 = 0;
minutess.setCaptionLabel("ВЫКЛ");
} else {
minutess.setCaptionLabel(str(min1)+" Мин1");
}
}
void controlEvent(ControlEvent theEvent) {
if (theEvent.isFrom(CheckBoxuvum)) {
//myColorBackground = 0;
print("got an event from "+CheckBoxuvum.getName()+"\t\n");
// checkBox uses arrayValue to store the state of
// individual checkBox-items. usage:
println(CheckBoxuvum.getArrayValue());
int col = 0;
for (int i=0; i<CheckBoxuvum.getArrayValue().length; i++) {
int n = (int)CheckBoxuvum.getArrayValue()[i];
print(n);
if (n==1) {
//myColorBackground += CheckBoxuvum.getItem(i).internalValue();
}
}
println();
}
if (theEvent.isGroup()) {
// check if the Event was triggered from a ControlGroup
println("event from group : "+theEvent.getGroup().getValue()+" from "+theEvent.getGroup());
} else if (theEvent.isController()) {
println("event from controller : "+theEvent.getController().getValue()+" from "+theEvent.getController());
}
}
协议：
int lengthmas = 7;
int RC = -128; // -128 separating byte в java.
int[] readIncome = new int[lengthmas];
int[] writeOutgioing = new int[lengthmas];
String incomingData= null;
String outgoingData=null;
void readInc() {
while ( serialPort.available() > 0) {
incomingData = serialPort.readStringUntil(RC);
readIncome = int(split (incomingData,',' )); // the received data is comma separated.
}
}
void writeOut() {
outgoingData=str(writeOutgioing[0])+str(writeOutgioing[1])+str(writeOutgioing[2])+str(writeOutgioing[3])+str(writeOutgioing[4])+str(writeOutgioing[5])+str(writeOutgioing[6]); // sending data as a string.
serialPort.write(outgoingData);
}
/*Protocol:
Protocol composition - an array of seven elements,0 - command,1-4 data,5 - remainder of packets for transmission,6 (-128) separating byte.
The controller responds by sending the same command and data.
Example: 10(Command),235,2353,564,5(packages left),77777(CRC),-128(RC)
Commands:
Modifier:
10 - minutess = cp5.addButton
20 - ImageButton button
30 - CheckBox P4
40 - NumberBox inputPULI
70 - NumberBox inputNapryzenieKV
60 - Textlabel Vin
50 - RadioButton CheckBoxuvum
*/
发送数据：
public void toapply()
{
}
循环：
void draw() {
background(50);
button.draw();
}
{
if (strata) {
readInc();
//readIncome[]
displaydata();
}
}
解决方法
问题是default:。
开关的运行方式是这样的：它找到与键相对应的大小写，并从此刻开始执行代码，直到遇到break;。 default:案例是一个包罗万象的东西：它就像一个永远都是真的条件。
为说明起见，我喜欢这个示例：在这里，当用户输入数字时，它将打印从该点到12月的所有月份的名称。
int month = 5;
switch (month) {
case 1: println("January");
case 2: println("February");
case 3: println("March");
case 4: println("April");
case 5: println("May");
case 6: println("June");
case 7: println("July");
case 8: println("August");
case 9: println("September");
case 10: println("October");
case 11: println("November");
case 12: println("December");
break;
default: println("Error: no valid month selected.");
break;
}
注意default的结尾。这是因为由于它始终为“ true”，并且由于开关只会选择一种情况，然后运行直到break语句，所以如果我将其放在其他位置，则在读取时将始终选择它。通过修改示例来查看：
int month = 5;
switch (month) {
default: println("Whatever,I'm not printing month anymore!");
break; // no case after this point will ever be read
case 1: println("January");
case 2: println("February");
case 3: println("March");
case 4: println("April");
case 5: println("May");
case 6: println("June");
case 7: println("July");
case 8: println("August");
case 9: println("September");
case 10: println("October");
case 11: println("November");
case 12: println("December");
break;
}
这正是程序中发生的情况。在DisplayData()中，一开始就有一个default案例，它会覆盖所有其他案例：
void Displaydata() {
switch(readIncome[0]) {
case 10:
default: // <--- HERE THIS IS ALWAYS SELECTED
minutess.setCaptionLabel(readIncome[1]+" Мин.");
min=readIncome[1];
break; // <--- EVERYTHING AFTER THIS IS IGNORED
您可以使用如下正确的语法进行重写：
void Displaydata() {
switch(readIncome[0]) {
case 10:
minutess.setCaptionLabel(readIncome[1]+" Мин.");
min=readIncome[1];
break;
case 20:
button.label(readIncome[1]+" Мин."); //ImageButton
min=readIncome[1];
break;
case 30:
if(readIncome[1]==1)P4.setText("on");
if(readIncome[1]==0)P4.setText("off");// CheckBox
break;
case 40:
inputPULI.setText("Bullet - "+readIncome[1] ); //Numberbox int
break;
case 70:
inputNapryzenieKV.setText("Voltage - "+readIncome[1] ); //Numberbox float
break;
case 60:
Vin.setText("Voltage K.V - "+readIncome[1] );
break;
case 50:
if(readIncome[1]==1)CheckBoxuvum.setText("+"); //RadioButton
if(readIncome[1]==0)CheckBoxuvum.setText("-");
break;
default:
println("DisplayData(): no case selected.");
break; // technically not necessary,but I like my switches tidy
}
}
玩得开心！