Finished ellipse app

QT/kolo/mywindow.cpp

@@ -6,8 +6,13 @@
 // z pliku XML "mywindow.ui"
 #include "ui_mywindow.h"
 
-#include <iostream>
 #include <cmath>
+#include <QColor>
+#include <QDebug>
+#include <QColorDialog>
+#include <iostream>
+#include <float.h> // for float,double macros
+#include <string.h>
 
 #define PI 3.1415
 
@@ -32,6 +37,10 @@ MyWindow::MyWindow(QWidget *parent) :
     poczX = ui->rysujFrame->x();
     poczY = ui->rysujFrame->y();
 
+    segment_count = ui->segmentSlider->value();
+    QString str(("Ilosc segmentow: " + std::to_string(segment_count)).c_str());
+    ui->segmentLabel->setText(str);
+
     // Tworzymy obiekt klasy QImage, o odpowiedniej szerokosci
     // i wysokosci. Ustawiamy format bitmapy na 32 bitowe RGB
     // (0xffRRGGBB).
@@ -60,6 +69,14 @@ void MyWindow::on_exitButton_clicked()
 }
 
 
+void MyWindow::on_segmentSlider_valueChanged(int val)
+{
+    segment_count = val;
+    QString str(("Ilosc segmentow: " + std::to_string(segment_count)).c_str());
+    ui->segmentLabel->setText(str);
+}
+
+
 // Funkcja "odmalowujaca" komponent
 void MyWindow::paintEvent(QPaintEvent*)
 {
@@ -135,6 +152,8 @@ void MyWindow::mousePressEvent(QMouseEvent *event)
 
     draw_finished = false;
 
+    mode = event->button() == Qt::LeftButton ? Circle : event->button() == Qt::RightButton ? Ellipse : Other;
+
     update();
 }
 
@@ -150,7 +169,7 @@ void MyWindow::mouseMoveEvent(QMouseEvent *event)
     x -= poczX;
     y -= poczY;
 
-    if(x >= szer || y >= wys || x < 0 || y < 0){
+    if(x >= szer || y >= wys || x < 0 || y < 0 || draw_finished){
         ApplyTempImage();
 
         active_img = img;
@@ -162,7 +181,11 @@ void MyWindow::mouseMoveEvent(QMouseEvent *event)
         return;
     }
 
+    if(mode == Circle){
+        DrawCircle(startX, startY, x, y);
+    }else if(mode == Ellipse){
         DrawEllipse(startX, startY, x, y);
+    }
 
     // Odswiezamy komponent
     update();
@@ -189,53 +212,51 @@ void MyWindow::UpdateTempImage(){
     memcpy(img_tmp->bits(), img->bits(), szer * wys * 4);
 }
 
-void Rysuj(unsigned char* ptr, int szer, int wys, int x, int y){
+void DrawPixel(unsigned char* ptr, int szer, int wys, QColor color, int x, int y){
     if(x >= szer || y >= wys || x < 0 || y < 0)
         return;
 
-    int kolor = 255;
+    ptr[szer*4*y + 4*x] = color.blue();
-    ptr[szer*4*y + 4*x] = kolor;
+    ptr[szer*4*y + 4*x + 1] = color.green();
-    ptr[szer*4*y + 4*x + 1] = kolor;
+    ptr[szer*4*y + 4*x + 2] = color.red();
-    ptr[szer*4*y + 4*x + 2] = kolor;
+    ptr[szer*4*y + 4*x + 3] = color.alpha();
-    ptr[szer*4*y + 4*x + 3] = 255;
 }
 
 void MyWindow::DrawLine(int x1, int y1, int x2, int y2, bool update_temp){
-
-    if(x2 >= szer || y2 >= wys || x2 < 0 || y2 < 0)
-        return;
-
-
     if(update_temp)
         UpdateTempImage();
 
+    unsigned char* ptr = img_tmp->bits();
     if(x1 > x2){
-        int tmpX = x1;
+        std::swap(x1, x2);
-        int tmpY = y1;
+        std::swap(y1, y2);
-        x1 = x2;
-        y1 = y2;
-        x2 = tmpX;
-        y2 = tmpY;
     }
-
-
-    int kolor = 255;
-    unsigned char *ptr;
-    int y = y2;
-    ptr = img_tmp->bits();
     float diff = x2 - x1;
-    float a = (y2 - y1) / diff;
+    float a = diff != 0 ? (y2 - y1) / diff : FLT_MAX;
-    for(int i = x1; i <= x2; i++){
-        int x = i;
-        y = a * (i - x1) + y1;
 
+    QColor color(255, 255, 255, 255);
 
-        Rysuj(ptr, szer, wys, x, y);
+    if(abs(a) < 0.5f){
-        // Ustawiamy kolor kliknietego piksela na bialy lub czarny
+        for(int x = x1; x <= x2; x++){
-//        ptr[szer*4*y + 4*x] = kolor;
+            int x_form = x - x1;
-//        ptr[szer*4*y + 4*x + 1] = kolor;
+            int y = a * x_form + y1;
-//        ptr[szer*4*y + 4*x + 2] = kolor;
+
-//        ptr[szer*4*y + 4*x + 3] = 255;
+            DrawPixel(ptr, szer, wys, color, x, y);
+        }
+    }
+    else{
+        if(y1 > y2){
+            std::swap(x1, x2);
+            std::swap(y1, y2);
+        }
+        float diff = x2 - x1;
+        float a = diff != 0 ? (y2 - y1) / diff : FLT_MAX;
+        for(int y = y1; y <= y2; y++){
+            int y_form = y - y1;
+            int x = ((float)(y_form) / a) + x1;
+
+            DrawPixel(ptr, szer, wys, color, x, y);
+        }
     }
 }
 
@@ -252,13 +273,15 @@ void MyWindow::DrawCircle(int x1, int y1, int x2, int y2){
     float R = sqrt(pow(x2 - x1, 2) + pow(y2 - y1, 2));
     int q_last_x = R / sqrt(2) + 1;
 
+    QColor color(255, 255, 255, 255);
+
     for(int x = 0; x <= q_last_x; x++){
         float y = sqrt(pow(R, 2) - pow(x, 2));
 
         for(int k = 0; k < 2; k++){
             for(int i = 0; i < 2; i++){
                 for(int j = 0; j < 2; j++){
-                    Rysuj(ptr, szer, wys, x1 + x, y1 - y);
+                    DrawPixel(ptr, szer, wys, color, x1 + x, y1 - y);
                     y *= -1;
                 }
                 x *= -1;
@@ -275,20 +298,14 @@ void MyWindow::DrawEllipse(int x1, int y1, int x2, int y2){
 
     UpdateTempImage();
 
-    int point_count = 60;
-
-    unsigned char *ptr;
-    ptr = img_tmp->bits();
-
-
     float last_x = 0;
     float last_y = 0;
 
     float Rx = abs(x2 - x1);
     float Ry = abs(y2 - y1);
 
-    for(int i = 0; i < point_count; i++){
+    for(int i = 0; i <= segment_count; i++){
-        double angle = 2.0 * PI * (float(i) / point_count);
+        double angle = 2.0 * PI * (float(i) / segment_count);
 
         float x = sin(angle) * Rx;
         float y = cos(angle) * Ry;

QT/kolo/mywindow.h

@@ -28,6 +28,8 @@
 // klikniecia, ruch myszka itp.
 #include <QMouseEvent>
 
+enum Mode {Ellipse, Circle, Other};
+
 namespace Ui {
     class MyWindow;
 }
@@ -59,6 +61,8 @@ private:
     // Do poszczegolnych elementow GUI odwolujemy sie za pomoca zmiennej "ui"
     Ui::MyWindow *ui;
 
+    Mode mode;
+
     // Pole przechowujace obrazek
     QImage *img;
     // Pole przechowujace obrazek
@@ -74,6 +78,7 @@ private:
     int poczY;
     int startX, startY;
     bool draw_finished;
+    int segment_count;
 
 
     // Deklaracje funkcji
@@ -93,6 +98,7 @@ private:
 private slots:
     void on_cleanButton_clicked();
     void on_exitButton_clicked();
+    void on_segmentSlider_valueChanged(int val);
     void mousePressEvent(QMouseEvent *event);
     void mouseMoveEvent(QMouseEvent *event);
     void mouseReleaseEvent(QMouseEvent *event);

QT/kolo/mywindow.ui

@@ -42,11 +42,11 @@
       <x>630</x>
       <y>10</y>
       <width>241</width>
-      <height>191</height>
+      <height>271</height>
      </rect>
     </property>
     <property name="title">
-     <string>Wypełnianie</string>
+     <string>Opcje</string>
     </property>
     <widget class="QPushButton" name="cleanButton">
      <property name="geometry">
@@ -74,6 +74,70 @@
       <string>Wyjście</string>
      </property>
     </widget>
+    <widget class="QSlider" name="segmentSlider">
+     <property name="geometry">
+      <rect>
+       <x>10</x>
+       <y>150</y>
+       <width>221</width>
+       <height>20</height>
+      </rect>
+     </property>
+     <property name="minimum">
+      <number>4</number>
+     </property>
+     <property name="maximum">
+      <number>100</number>
+     </property>
+     <property name="value">
+      <number>10</number>
+     </property>
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="tickPosition">
+      <enum>QSlider::TicksAbove</enum>
+     </property>
+     <property name="tickInterval">
+      <number>10</number>
+     </property>
+    </widget>
+    <widget class="QLabel" name="segmentLabel">
+     <property name="geometry">
+      <rect>
+       <x>10</x>
+       <y>120</y>
+       <width>131</width>
+       <height>20</height>
+      </rect>
+     </property>
+     <property name="text">
+      <string>TextLabel</string>
+     </property>
+    </widget>
+    <widget class="QLabel" name="label">
+     <property name="geometry">
+      <rect>
+       <x>10</x>
+       <y>186</y>
+       <width>221</width>
+       <height>71</height>
+      </rect>
+     </property>
+     <property name="text">
+      <string>Przytrzymaj lewy przycisk myszy by utworzyć okrąg.
+Przytrzymaj prawy przycisk myszy by utworzyć elipse.</string>
+     </property>
+     <property name="textFormat">
+      <enum>Qt::PlainText</enum>
+     </property>
+     <property name="scaledContents">
+      <bool>false</bool>
+     </property>
+     <property name="wordWrap">
+      <bool>true</bool>
+     </property>
+    </widget>
    </widget>
   </widget>
   <widget class="QMenuBar" name="menuBar">