如何更改使用处理语言按下鼠标的颜色

Question

你好，以便我的程序，我必须创建3个按钮，并且每个按钮被鼠标按下颜色必须改变，我很困扰我如何切换使用处理语言按下鼠标时按下不同颜色的按钮，任何提示？这是我的代码迄今！对于小部件

 PFont stdFont; 
    final int EVENT_BUTTON1=1; 
    final int EVENT_BUTTON2=2; 
    final int EVENT_BUTTON3=3; 
    final int EVENT_NULL=0; 
    Widget widget1, widget2,widget3; 
    ArrayList widgetList; 


    void setup(){ 
    stdFont=loadFont("AbadiMT-CondensedLight-48.vlw"); 
    textFont(stdFont); 

widget1=new Widget(100, 100, 180, 40, 
"RED", color(100), 
stdFont, EVENT_BUTTON1); 
widget2=new Widget(100, 200, 180, 40, 
"GREEN", color(100), 
stdFont, EVENT_BUTTON2);       
size(400, 400); 
widget3=new Widget(100, 300, 180, 40, 
"BLUE", color(100), 
stdFont, EVENT_BUTTON2);       
size(400, 400); 


widgetList = new ArrayList(); 
widgetList.add(widget1); widgetList.add(widget2); widgetList.add(widget3); 

} 

void draw(){ 
    for(int i = 0; i<widgetList.size(); i++){ 
Widget aWidget = (Widget)widgetList.get(i); 
aWidget.draw(); 
    } 

    } 

void mousePressed(){ 
int event; 

    for(int i = 0; i<widgetList.size(); i++){ 
Widget aWidget = (Widget) widgetList.get(i); 
    event = aWidget.getEvent(mouseX,mouseY); 
    switch(event) { 
    case EVENT_BUTTON1: 
     println("button 1!"); 
     break; 
    case EVENT_BUTTON2: 
     println("button 2!"); 
     break; 

     case EVENT_BUTTON3: 
     println("button 3!"); 
     break; 
    } 
} 
} 



main widget class 

class Widget { 
int x, y, width, height; 
String label; int event; 
    color widgetColor, labelColor; 
PFont widgetFont; 

    Widget(int x,int y, int width, int height, String label, 
    color widgetColor, PFont widgetFont, int event){ 
    this.x=x; this.y=y; this.width = width; this.height= height; 
    this.label=label; this.event=event; 
    this.widgetColor=widgetColor; this.widgetFont=widgetFont; 
    labelColor= color(0); 
    } 
void draw(){ 
    fill(widgetColor); 
    rect(x,y,width,height); 
    fill(labelColor); 
    text(label, x+10, y+height-10); 
} 
int getEvent(int mX, int mY){ 
if(mX>x && mX < x+width && mY >y && mY <y+height){ 
    return event; 
} 
return EVENT_NULL; 
} 
    } 

Answer 1

主程序听起来像一个家庭作业。一个通用的答案：

class RectangularThing { 
    float x, y, w, h; 
    color boxColor = 0; 
    [...] 
    boolean over(float mx, float my) { 
    // return "true" if mx/my is inside this rectangle, 
    // otherwise return "false" 
    } 
    void setColor(color c) { 
    boxColor = c; 
    } 
    void draw() { 
    stroke(boxColor); 
    fill(boxColor); 
    rect(x,y,w,h); 
    } 
} 

[...] 

ArrayList<RectangularThing> allmythings; 

void setup() { 
    ... 
    allmythings = new ArrayList<RectangularThing>(); 
    ... 
} 

void draw() { 
    // this kind of looping is the same as 
    // "for(int i=0, last=allmythings;i<last;i++) { 
    // RectangularThing t = allmythings[i]; 
    // ..." except that it's less code and easier 
    // to read. If you're just iterating without 
    // needing the iteration counter, this is nicer. 
    for(RectangularThing t: allmythings) { 
    t.draw(); 
    } 
} 

void mouseClicked() { 
    for(RectangularThing t: allmythings) { 
    if(t.over(mouseX,mouseY)) { 
     t.setColor(...); 
    } 
    } 
    redraw(); 
} 

所以：使事情负责绘制自己，并给予他们需要做的是正确的所有属性。然后在需要基于代码或用户交互时更改这些属性。