Add filedialog() function, make everything work 100% with Python

src/net/apocalypselabs/symat/Functions.java

@@ -66,6 +66,7 @@ import java.util.Map;
 import java.util.NoSuchElementException;
 import java.util.Set;
 import java.util.prefs.Preferences;
+import javax.swing.JFileChooser;
 import javax.swing.JOptionPane;
 import static net.apocalypselabs.symat.Main.API_URL;
 import org.matheclipse.core.eval.EvalUtilities;
@@ -848,7 +849,10 @@ public class Functions {
      * @param max Maximum value, inclusive
      * @return random integer
      */
-    public int rand(int min, int max) {
+    public double rand(int min, int max) {
+        if (min == 0 && max == 0) {
+            return rand();
+        }
         return rng.nextInt((max - min) + 1) + min;
     }
 
@@ -995,7 +999,9 @@ public class Functions {
 
     public void plot(String function) {
         showGraph();
-        graphwin.graphFunction(function);
+        if (!function.equals("")) {
+            graphwin.graphFunction(function);
+        }
     }
 
     public void plot(double[] x, double[] y) {
@@ -1023,15 +1029,20 @@ public class Functions {
         plot(f);
     }
 
-    public void plotname(String t) {
-        graphwin.setWindowTitle(t);
-        graphwin.setLabel(t);
-    }
-
     public String plotname() {
         return graphwin.getTitle();
     }
 
+    public String plotname(String t) {
+        if (t.equals("symatpythonnullplotname")) {
+            return graphwin.getTitle();
+        } else {
+            graphwin.setWindowTitle(t);
+            graphwin.setLabel(t);
+            return "";
+        }
+    }
+
     public void plot() {
         showGraph();
     }
@@ -1061,6 +1072,21 @@ public class Functions {
         FileUtils.saveFile(content, path, false);
     }
 
+    /**
+     * Show a file dialog and return the path of the chosen file (or "" if
+     * canceled).
+     *
+     * @return
+     */
+    public String filedialog() {
+        JFileChooser fc = new JFileChooser();
+        int result = fc.showDialog(Main.maingui, "Choose");
+        if (result == JFileChooser.APPROVE_OPTION) {
+            return fc.getSelectedFile().getPath();
+        }
+        return "";
+    }
+
     public String md5sum(String data) {
         return FileUtils.MD5(data);
     }

src/net/apocalypselabs/symat/functions.py

@@ -14,14 +14,10 @@ def deg(num):
     return _.deg(num)
 def subs(fun,var):
     return _.subs(fun,var)
-def plot():
-    _.plot()
-def plot(fun):
+def plot(fun=""):
     _.plot(fun)
-def plotname(fun):
-    _.plotname(fun)
-def plotname():
-    return _.plotname()
+def plotname(fun='symatpythonnullplotname'):
+    return _.plotname(fun)
 def xlim(min,max):
     _.xlim(min,max)
 def plotclr():
@@ -50,9 +46,7 @@ def divide(*a):
     return _.divide(a)
 def mod(*a):
     return _.mod(a)
-def rand():
-    return _.rand()
-def rand(min,max):
+def rand(min=0,max=0):
     return _.rand(min,max)
 def randb():
     return _.randb()
@@ -93,4 +87,6 @@ def sech(a):
 def csch(a):
     return _.csch(a)
 def coth(a):
-    return _.coth(a)
+    return _.coth(a)
+def filedialog():
+    return _.filedialog()

src/net/apocalypselabs/symat/resources/functions.txt

@@ -59,4 +59,5 @@ solve(f,'x',0)|Solve function f for 'x' when it equals 0.
 solve(f,'x')|Solve function f for 'x', assuming equal to 0.
 solve(f)|Solve function f, assuming 'x' and 0.
 printa(array)|Get array contents as text.
-primes(n)|Find all prime numbers up to n.
+primes(n)|Find all prime numbers up to n.
+filedialog()|Open a file chooser and return the chosen file path.