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example/Calculator.cpp

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+#ifndef CALCULATOR_CPP
+#define CALCULATOR_CPP
+
+#include "Calculator.hpp"
+#include <tinyexpr.h> // mathematics library
+
+
+void Calculator::launch()
+{
+    buildGui();
+}
+
+void Calculator::buildGui()
+{
+    Window window("");
+    window.background_img=true;
+
+    String keys[] = {"AC", "+/-", "%", "/", "7", "8", "9", "*", "4", "5", "6", "-", "1", "2", "3", "+", "0", " ", ".", "="};
+
+    Box* calculContent = new Box(63, 44, 193, 81);
+        Label* oldCalculLabel = new Label(0, 0, 193, 31, "");
+            oldCalculLabel->fontSize=16;
+            oldCalculLabel->setTextColor(COLOR_GREY);
+            oldCalculLabel->setHorizontalAlignment(CENTER_ALIGNMENT);
+        Label* actualCalculLabel = new Label(0, 31, 193, 50, "");
+            actualCalculLabel->fontSize=40;
+            actualCalculLabel->setTextColor(COLOR_BLACK);
+            actualCalculLabel->setHorizontalAlignment(CENTER_ALIGNMENT);
+            actualCalculLabel->setRadius(0);
+        calculContent->addChild(oldCalculLabel);
+        calculContent->addChild(actualCalculLabel);
+
+    Box* keyboard = new Box(20, 125, 280, 340);
+        Label* AC_btn;
+        Label* invert_btn;
+        Label* equals_btn;
+        for(int y = 0; y < 5; y++)
+            for(int x = 0; x < 4; x++)
+            {
+                Label* nbt = new Label(72.5*x, 70*y, 62, 60, keys[x+y*4]);
+                nbt->setRadius(30);
+                nbt->fontSize=20;
+                nbt->setTextColor(COLOR_BLACK);
+                if(x==3 || (x==2 && y==0))
+                    nbt->setBackgroundColor(COLOR_BEIGE);
+                else
+                    nbt->setBackgroundColor(COLOR_LIGHT);
+
+                if(x==0 && y==4)
+                    nbt->setWidth(135);
+
+                if(x==0 && y==0)
+                    AC_btn=nbt;
+                if(x==1 && y==0)
+                    invert_btn=nbt;
+                if(x==3 && y==4)
+                    equals_btn=nbt;
+
+                nbt->onreleased = addChar;
+                nbt->dataCallback = (void*) actualCalculLabel;
+
+                if(keys[x+y*4]=="0")
+                    x++;
+                keyboard->addChild(nbt);
+            }
+
+    window.addChild(calculContent);
+    window.addChild(keyboard);
+
+    window.drawAll();
+
+    while (1)
+    {
+        window.updateAll();
+
+        if(home_button.pressed())
+        {
+            window.removechildren();
+            return;
+        }
+
+        {
+            int oldFont = actualCalculLabel->fontSize;
+            while(actualCalculLabel->getWidthOfText()<160 && actualCalculLabel->fontSize <= 40)
+            {
+                actualCalculLabel->fontSize++;
+            }
+            while(actualCalculLabel->getWidthOfText()>160)
+            {
+                actualCalculLabel->fontSize--;
+            }
+            if(actualCalculLabel->fontSize != oldFont)
+                actualCalculLabel->drawAll();
+        }
+
+        if(equals_btn->isTouched())
+        {
+            String str = actualCalculLabel->getText();
+            if(str.length()!=0)
+            {
+                char * chr =(char *) malloc(str.length());
+                strcpy(chr, str.c_str());
+                str = String(te_interp(chr, 0));
+                oldCalculLabel->setText(actualCalculLabel->getText());
+                actualCalculLabel->setText(str);
+                window.drawAll();
+            }
+        }
+        if(AC_btn->isTouched())
+        {
+            actualCalculLabel->setText("");
+            window.drawAll();
+        }
+    }
+}
+
+#endif

example/Calculator.hpp

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+#ifndef CALCULATOR_HPP
+#define CALCULATOR_HPP
+
+
+class Calculator : public App
+{
+public:
+    String getName() { return "calculator"; }
+    String getLogo() { return "/paxo/apps/calculator/logo.bmp"; };
+
+    void launch();
+
+    void buildGui();
+
+    appEvent addChar(App *app, Gauss* objectPrt, void* data)
+    {
+        String chr = reinterpret_cast<Label*>(objectPrt)->getText();
+        Label* label = reinterpret_cast<Label*>(data);
+
+        label->addText(chr);
+        label->drawAll();
+    }
+};
+
+#include "Calculator.cpp"
+
+
+#endif