swing - rotating coordinate plane for data and text in Java -
i need to:
1.) move origin , rotate coordinate plane x-values progress rightward , y-values progress upward new origin(which needs bottom left corner of inner, blue rectangle in code below). enable me plot points @ x,y coordinate pairs in code below.
2.) plot rotated labels tic marks on y-axis of data plot.
the code below sets problem. works, except 2 problems:
1.) data points being plotted upper left hand corner origin , y-values descending downward
2.) labels tic marks on y-axis not being drawn on screen
can show me how fix code below fixes these 2 problems , first paragraph above describes?
the code in following 2 java files:
datagui.java
import java.awt.*; import java.util.arraylist; import javax.swing.*; class datagui extends jframe{ datagui() { super("x,y plot"); this.setdefaultcloseoperation(jframe.exit_on_close); this.setpreferredsize(new dimension(800, 400)); this.pack(); this.setsize(new dimension(800, 600)); this.setlocationrelativeto(null); setlayout(new gridlayout()); arraylist<double> mydiffs = new arraylist<double>(); mydiffs.add(25.0); mydiffs.add(9.0); mydiffs.add(7.0); mydiffs.add(16.0); mydiffs.add(15.0); mydiffs.add(6.0); mydiffs.add(2.0); mydiffs.add(8.0); mydiffs.add(2.0); mydiffs.add(27.0); mydiffs.add(14.0); mydiffs.add(12.0); mydiffs.add(19.0); mydiffs.add(10.0); mydiffs.add(11.0); mydiffs.add(8.0); mydiffs.add(19.0); mydiffs.add(2.0); mydiffs.add(16.0); mydiffs.add(5.0); mydiffs.add(18.0); mydiffs.add(23.0); mydiffs.add(9.0); mydiffs.add(4.0); mydiffs.add(8.0); mydiffs.add(9.0); mydiffs.add(3.0); mydiffs.add(3.0); mydiffs.add(9.0); mydiffs.add(13.0); mydiffs.add(17.0); mydiffs.add(7.0); mydiffs.add(0.0); mydiffs.add(2.0); mydiffs.add(3.0); mydiffs.add(33.0); mydiffs.add(23.0); mydiffs.add(26.0); mydiffs.add(12.0); mydiffs.add(12.0); mydiffs.add(19.0); mydiffs.add(14.0); mydiffs.add(9.0); mydiffs.add(26.0); mydiffs.add(24.0); mydiffs.add(13.0); mydiffs.add(19.0); mydiffs.add(2.0); mydiffs.add(7.0); mydiffs.add(28.0); mydiffs.add(15.0); mydiffs.add(2.0); mydiffs.add(5.0); mydiffs.add(17.0); mydiffs.add(2.0); mydiffs.add(16.0); mydiffs.add(19.0); mydiffs.add(2.0); mydiffs.add(31.0); datapanel mypp = new datapanel(mydiffs,this.getheight(),this.getwidth()); this.add(mypp); this.setvisible(true);// display panel. } public static void main(string[] args){ datagui mydatagui = new datagui(); mydatagui.setvisible(true); } } datapanel.java (note: edited code below include trashgod's suggestions, still not work.)
import java.awt.*; import java.awt.geom.affinetransform; import javax.swing.*; import java.text.decimalformat; import java.text.numberformat; import java.util.*; class datapanel extends jpanel { insets ins; // holds panel's insets arraylist<double> mydiffs; double maxdiff = double.negative_infinity; double mindiff = double.positive_infinity; double maxplot; datapanel(arraylist<double> diffs, int h, int w){ setopaque(true);// ensure panel opaque. setpreferredsize(new dimension(w, h)); setminimumsize(new dimension(w, h)); setmaximumsize(new dimension(w, h)); mydiffs = diffs; repaint(); this.setvisible(true); } protected void paintcomponent(graphics g){// override paintcomponent() method. super.paintcomponent(g); //get data plotting environment , text int height = getheight(); int width = getwidth(); ins = getinsets(); graphics2d g2d = (graphics2d)g; fontmetrics fontmetrics = g2d.getfontmetrics(); string xstring = ("x-axis label"); int xstrwidth = fontmetrics.stringwidth(xstring); int xstrheight = fontmetrics.getheight(); string ystring = "y-axis label"; int ystrwidth = fontmetrics.stringwidth(ystring); int ystrheight = fontmetrics.getheight(); string titlestring ="title of graphic"; int titlestrwidth = fontmetrics.stringwidth(titlestring); int titlestrheight = fontmetrics.getheight(); int leftmargin = ins.left; //set parameters inner rectangle int hpad=10; int vpad = 6; int testleftstartplotwindow = ins.left+5+(3*ystrheight); int testinnerwidth = width-testleftstartplotwindow-ins.right-hpad; getmaxmindiffs(); getmaxplotval(); double increment = 5.0; int numticks = (int)(maxplot/increment);//will use numticks for: remainder, leftstartplotwindow, innerrectangle+labels+tickmarks int remainder = testinnerwidth%numticks; int leftstartplotwindow = testleftstartplotwindow-remainder; system.out.println("remainder is: "+remainder); int bottompad = (3*xstrheight)-vpad; int bluetop = ins.bottom+(vpad/2)+titlestrheight; int blueheight = height-bottompad-bluetop; int bluewidth = blueheight; int bluebottom = blueheight+bluetop; //plot outer rectangle g.setcolor(color.red); int redwidth = width-leftmargin-1; g.drawrect(leftmargin, ins.bottom, redwidth, height-ins.bottom-1); //write top label g.setcolor(color.black); g.drawstring(titlestring, leftstartplotwindow+((bluewidth/2)-(titlestrwidth/2)), titlestrheight); // fill, plot, inner rectangle g.setcolor(color.white); g.fillrect(leftstartplotwindow, bluetop, bluewidth, blueheight); g.setcolor(color.blue); g.drawrect(leftstartplotwindow, bluetop, bluewidth, blueheight); //scale diffs fit window double scalar = bluewidth/maxplot; arraylist<double> scaleddiffs = new arraylist<double>(); for(int e = 0;e<mydiffs.size();e++){scaleddiffs.add(mydiffs.get(e)*scalar);} //plot scaled diffs affinetransform @ = g2d.gettransform();//save graphics context's transform g2d.translate(leftstartplotwindow, bluetop);//translate origin bottom-left corner of blue rectangle g2d.scale(1, -1);//invert y-axis for(int w = 0;w<scaleddiffs.size();w++){ if(w>0){ double prior = scaleddiffs.get(w-1); int priorint = (int)prior; double current = scaleddiffs.get(w); int currentint = (int)current; g2d.drawoval(priorint, currentint, 4, 4); } } g2d.settransform(at);//restore transform conventional rendering //write x-axis label g.setcolor(color.red); g.drawstring(xstring, leftstartplotwindow+((bluewidth/2)-(xstrwidth/2)), height-ins.bottom-vpad); //write y-axis label g2d.rotate(math.toradians(-90), 0, 0);//rotate text 90 degrees counter-clockwise g.drawstring(ystring, -(height/2)-(ystrwidth/2), ystrheight); g2d.rotate(math.toradians(+90), 0, 0);//rotate text 90 degrees clockwise // draw tick marks on x-axis numberformat formatter = new decimalformat("#0.0"); double k = (double)bluewidth/(double)numticks; double iteration = 0; for(int h=0;h<=numticks;h++){ int xval = (int)(h*k); g.setcolor(color.red); g.drawline(leftstartplotwindow+xval, bluebottom+2, leftstartplotwindow+xval, bluebottom+(xstrheight/2));//draw tick marks g.drawstring(formatter.format(iteration),leftstartplotwindow+xval-(fontmetrics.stringwidth(double.tostring(iteration))/2),bluebottom+(xstrheight/2)+13); iteration+=increment; } // draw tick marks on y-axis iteration = 0; for(int h=0;h<=numticks;h++){ int yval = (int)(h*k); g.setcolor(color.red); g.drawline(leftstartplotwindow-2, bluebottom-yval, leftstartplotwindow-(ystrheight/2), bluebottom-yval);//draw tick marks g2d.rotate(math.toradians(-90), 0, 0);//rotate text 90 degrees counter-clockwise g.drawstring(formatter.format(iteration),leftstartplotwindow-2,bluebottom-(fontmetrics.stringwidth(double.tostring(iteration))/2)); g2d.rotate(math.toradians(+90), 0, 0);//rotate text 90 degrees clockwise iteration+=increment; } } void getmaxmindiffs(){// max , min of diffs for(int u = 0;u<mydiffs.size();u++){ if(mydiffs.get(u)>maxdiff){maxdiff = mydiffs.get(u);} if(mydiffs.get(u)<mindiff){mindiff = mydiffs.get(u);} } } void getmaxplotval(){ maxplot = maxdiff; maxplot += 1;//make sure maxplot bigger max data value while(maxplot%5!=0){maxplot+=1;}//make sure maxplot multiple of 5 } } also, always, links articles or tutorials on topic appreciated.
one approach shown in sinetest. in outline,
save graphics context's transform.
graphics2d g2d = (graphics2d) g; affinetransform @ = g2d.gettransform();translate origin center.
g2d.translate(w / 2, h / 2);invert y-axis.
g2d.scale(1, -1);render using cartesian coordinates.
restore transform conventional rendering.
g2d.settransform(at);
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