Add a new Lumina project: desktop-utils/lumina-calculator

This is just a very basic calculator at the moment. It still need more buttons/icons/features/etc added to it, but the algorithm and mathematics are already functional for evaluation expressions containing:
Addition/Subtraction (+/-)
Multiplication/Division( * or x, and /)
Order of operations when mixing operations, including expressions within parentheses

5 files changed, 290 insertions, 0 deletions

diff --git a/src-qt5/desktop-utils/lumina-calculator/lumina-calculator.pro b/src-qt5/desktop-utils/lumina-calculator/lumina-calculator.pro
new file mode 100644
index 00000000..8c36c516
--- /dev/null
+++ b/src-qt5/desktop-utils/lumina-calculator/lumina-calculator.pro
@@ -0,0 +1,92 @@
+include("$${PWD}/../../OS-detect.pri")
+
+QT += core gui widgets
+
+TARGET  = lumina-calculator
+target.path = $${L_BINDIR}
+
+HEADERS	+= mainUI.h
+		
+SOURCES	+= main.cpp \
+			mainUI.cpp 
+
+FORMS		+= mainUI.ui 
+
+LIBS += -lLuminaUtils
+
+DEPENDPATH	+= ../../libLumina
+
+TRANSLATIONS =  i18n/l-calc_af.ts \
+                i18n/l-calc_ar.ts \
+                i18n/l-calc_az.ts \
+                i18n/l-calc_bg.ts \
+                i18n/l-calc_bn.ts \
+                i18n/l-calc_bs.ts \
+                i18n/l-calc_ca.ts \
+                i18n/l-calc_cs.ts \
+                i18n/l-calc_cy.ts \
+                i18n/l-calc_da.ts \
+                i18n/l-calc_de.ts \
+                i18n/l-calc_el.ts \
+                i18n/l-calc_en_GB.ts \
+                i18n/l-calc_en_ZA.ts \
+                i18n/l-calc_es.ts \
+                i18n/l-calc_et.ts \
+                i18n/l-calc_eu.ts \
+                i18n/l-calc_fa.ts \
+                i18n/l-calc_fi.ts \
+                i18n/l-calc_fr.ts \
+                i18n/l-calc_fr_CA.ts \
+                i18n/l-calc_gl.ts \
+                i18n/l-calc_he.ts \
+                i18n/l-calc_hi.ts \
+                i18n/l-calc_hr.ts \
+                i18n/l-calc_hu.ts \
+                i18n/l-calc_id.ts \
+                i18n/l-calc_is.ts \
+                i18n/l-calc_it.ts \
+                i18n/l-calc_ja.ts \
+                i18n/l-calc_ka.ts \
+                i18n/l-calc_ko.ts \
+                i18n/l-calc_lt.ts \
+                i18n/l-calc_lv.ts \
+                i18n/l-calc_mk.ts \
+                i18n/l-calc_mn.ts \
+                i18n/l-calc_ms.ts \
+                i18n/l-calc_mt.ts \
+                i18n/l-calc_nb.ts \
+                i18n/l-calc_nl.ts \
+                i18n/l-calc_pa.ts \
+                i18n/l-calc_pl.ts \
+                i18n/l-calc_pt.ts \
+                i18n/l-calc_pt_BR.ts \
+                i18n/l-calc_ro.ts \
+                i18n/l-calc_ru.ts \
+                i18n/l-calc_sk.ts \
+                i18n/l-calc_sl.ts \
+                i18n/l-calc_sr.ts \
+                i18n/l-calc_sv.ts \
+                i18n/l-calc_sw.ts \
+                i18n/l-calc_ta.ts \
+                i18n/l-calc_tg.ts \
+                i18n/l-calc_th.ts \
+                i18n/l-calc_tr.ts \
+                i18n/l-calc_uk.ts \
+                i18n/l-calc_uz.ts \
+                i18n/l-calc_vi.ts \
+                i18n/l-calc_zh_CN.ts \
+                i18n/l-calc_zh_HK.ts \
+                i18n/l-calc_zh_TW.ts \
+                i18n/l-calc_zu.ts
+
+dotrans.path=$${L_SHAREDIR}/lumina-desktop/i18n/
+dotrans.extra=cd i18n && $${LRELEASE} -nounfinished *.ts && cp *.qm $(INSTALL_ROOT)$${L_SHAREDIR}/lumina-desktop/i18n/
+
+#desktop.files=lumina-calculator.desktop
+#desktop.path=$${L_SHAREDIR}/applications/
+
+INSTALLS += target
+
+WITH_I18N{
+  INSTALLS += dotrans
+}
diff --git a/src-qt5/desktop-utils/lumina-calculator/main.cpp b/src-qt5/desktop-utils/lumina-calculator/main.cpp
new file mode 100644
index 00000000..af252cb3
--- /dev/null
+++ b/src-qt5/desktop-utils/lumina-calculator/main.cpp
@@ -0,0 +1,19 @@
+//===========================================
+//  Lumina Desktop source code
+//  Copyright (c) 2016, Ken Moore
+//  Available under the 3-clause BSD license
+//  See the LICENSE file for full details
+//===========================================
+#include <QApplication>
+#include <QDebug>
+
+#include "mainUI.h"
+
+int  main(int argc, char *argv[]) {
+   QApplication a(argc, argv);
+
+   //Now start the window
+   mainUI W;
+   W.show();
+   return  a.exec();
+}
diff --git a/src-qt5/desktop-utils/lumina-calculator/mainUI.cpp b/src-qt5/desktop-utils/lumina-calculator/mainUI.cpp
new file mode 100644
index 00000000..18d2cfdd
--- /dev/null
+++ b/src-qt5/desktop-utils/lumina-calculator/mainUI.cpp
@@ -0,0 +1,92 @@
+//===========================================
+//  Lumina Desktop source code
+//  Copyright (c) 2016, Ken Moore
+//  Available under the 3-clause BSD license
+//  See the LICENSE file for full details
+//===========================================
+#include "mainUI.h"
+#include "ui_mainUI.h"
+
+#include <QDebug>
+
+#define VALIDSYMBOLS QString("+-*x/.")
+
+#include <math.h>
+#define BADVALUE NAN
+
+mainUI::mainUI() : QMainWindow(), ui(new Ui::mainUI()){
+  ui->setupUi(this);
+  connect(ui->tool_start, SIGNAL(clicked()), this, SLOT(start_calc()) );
+  connect(ui->line_eq, SIGNAL(returnPressed()), this, SLOT(start_calc()) );
+  ui->line_eq->setFocus();
+}
+
+mainUI::~mainUI(){
+  
+}
+
+void mainUI::start_calc(){
+  if(ui->line_eq->text().isEmpty()){ return; } //nothing to do
+  double result = strToNumber(ui->line_eq->text());
+  if(result!=result){ return; } //bad calculation - NaN's values are special in that they don't equal itself
+  QString res = "%1 \t(%2)";
+  ui->list_results->addItem(res.arg(QString::number(result), ui->line_eq->text()));
+  ui->list_results->scrollToItem( ui->list_results->item( ui->list_results->count()-1) );
+  ui->line_eq->clear();
+}
+
+double mainUI::performOperation(double LHS, double RHS, QChar symbol){
+  if(symbol== '+'){ return (LHS+RHS); }
+  else if(symbol== '-'){ return (LHS-RHS); }
+  else if(symbol== '*' || symbol=='x'){ return (LHS*RHS); }
+  else if(symbol== '/'){ return (LHS/RHS); }
+  //else if(symbol== '%'){ return (LHS%RHS); }
+  qDebug() << "Invalid Symbol:" << symbol;
+  return BADVALUE;
+}
+
+double mainUI::strToNumber(QString str){
+  //Look for perentheses first
+  qDebug() << "String to Number: " << str;
+  if(str.indexOf("(")>=0){
+    //qDebug() << "Found Parenthesis";
+    int start = str.indexOf("(");
+    int need = 1;
+    int end = -1;
+    for(int i=start+1; i<str.length() && need>0; i++){
+      if(str[i]=='('){ need++; }
+      else if(str[i]==')'){ need--; }
+      //qDebug() << "Check char:" << str[i] << need;
+      if(need==0){ end = i; }
+    }
+    if(end<start){ return BADVALUE; }
+    //qDebug() << "Replace value:" << str << start << end << str.mid(start+1,end-start);
+    str.replace(start, end-start+1, QString::number( strToNumber( str.mid(start+1, end-start-1)) ) );
+    //qDebug() << "Replaced:" << str;
+  }
+  //  -------------------------------------
+  // NOTE: the order of operations appears reversed here due to the recursive nature of the algorithm
+  //     the first operation *found* is actually the last one *evaluated*
+  // --------------------------------------
+  //Now look for add/subtract
+  int sym = -1;
+  QStringList symbols; symbols << "+" << "-";
+  for(int i=0; i<symbols.length(); i++){
+    int tmp = str.indexOf(symbols[i]);
+    if(sym < tmp){ sym = tmp; }
+  }
+  if(sym>0){  return performOperation( strToNumber(str.left(sym)), strToNumber(str.right(str.length()-sym-1)), str[sym]); }
+  if(sym==0){ return BADVALUE; }
+  //Now look for multiply/divide
+  symbols.clear(); symbols << "x" << "*" << "/";
+  for(int i=0; i<symbols.length(); i++){
+    int tmp = str.indexOf(symbols[i]);
+    if(sym < tmp){ sym = tmp; }
+  }
+  if(sym>0){  return performOperation( strToNumber(str.left(sym)), strToNumber(str.right(str.length()-sym-1)), str[sym]); }
+  if(sym==0){ return BADVALUE; }
+
+  //Could not find any operations - must be a raw number
+  //qDebug() << "Found Number:" << str.toDouble();
+  return str.toDouble();
+}
diff --git a/src-qt5/desktop-utils/lumina-calculator/mainUI.h b/src-qt5/desktop-utils/lumina-calculator/mainUI.h
new file mode 100644
index 00000000..96414252
--- /dev/null
+++ b/src-qt5/desktop-utils/lumina-calculator/mainUI.h
@@ -0,0 +1,33 @@
+//===========================================
+//  Lumina Desktop source code
+//  Copyright (c) 2016, Ken Moore
+//  Available under the 3-clause BSD license
+//  See the LICENSE file for full details
+//===========================================
+#ifndef _LUMINA_CALCULATOR_MAIN_UI_H
+#define _LUMINA_CALCULATOR_MAIN_UI_H
+
+#include <QMainWindow>
+#include <QString>
+#include <QChar>
+
+namespace Ui{
+	class mainUI;
+};
+
+class mainUI : public QMainWindow{
+	Q_OBJECT
+public:
+	mainUI();
+	~mainUI();
+
+private slots:
+	void start_calc();
+
+private:
+	Ui::mainUI *ui;
+
+	double performOperation(double LHS, double RHS, QChar symbol);
+	double strToNumber(QString str); //this is highly-recursive
+};
+#endif
diff --git a/src-qt5/desktop-utils/lumina-calculator/mainUI.ui b/src-qt5/desktop-utils/lumina-calculator/mainUI.ui
new file mode 100644
index 00000000..0e52f4db
--- /dev/null
+++ b/src-qt5/desktop-utils/lumina-calculator/mainUI.ui
@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>mainUI</class>
+ <widget class="QMainWindow" name="mainUI">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>245</width>
+    <height>149</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Calculator</string>
+  </property>
+  <widget class="QWidget" name="centralwidget">
+   <layout class="QVBoxLayout" name="verticalLayout">
+    <item>
+     <widget class="QListWidget" name="list_results"/>
+    </item>
+    <item>
+     <layout class="QHBoxLayout" name="horizontalLayout">
+      <item>
+       <widget class="QLineEdit" name="line_eq"/>
+      </item>
+      <item>
+       <widget class="QToolButton" name="tool_start">
+        <property name="text">
+         <string>...</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </item>
+    <item>
+     <spacer name="verticalSpacer">
+      <property name="orientation">
+       <enum>Qt::Vertical</enum>
+      </property>
+      <property name="sizeHint" stdset="0">
+       <size>
+        <width>20</width>
+        <height>40</height>
+       </size>
+      </property>
+     </spacer>
+    </item>
+   </layout>
+  </widget>
+  <widget class="QStatusBar" name="statusbar"/>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>