I am trying to apply a texture from a function but it doesn't seem to be working so how do I apply a texture to a function in sfml? I also get a error when I try to apply a texture from a function which is: button.h|18|error: no matching function for call to 'sf::RectangleShape::setTexture(sf::Texture&)'|. You can solve this problem by finding a way to apply a texture from a function or by fixing the error and it applies the texture. I have 2 files, one called main.cpp and another one called button.h. Here is their code.
main.cpp
#include <SFML/Graphics.hpp>
#include <iostream>
#include <windows.h>
#include "button.h"
using namespace std;
using namespace sf;
int main(){
bool isStartOpen = false;
RenderWindow window(VideoMode(500, 500), "Operating System", Style::Close | Style::Resize);
RectangleShape player(Vector2f(500.0f, 30.0f));
RectangleShape startMenu(Vector2f(300.0f, 400.0f));
Texture startTexture;
if(!startTexture.loadFromFile("startButton.png")){
MessageBox(NULL, "Error loading image file: startButton.png in the system", "Image File Error", MB_OK | MB_ICONERROR);
}
startMenu.setFillColor(Color(0, 0, 0, 200));
startMenu.setPosition(0.0f, 500.0f);
player.setFillColor(Color::Black);
player.setPosition(0.0f, 473.0f);
Font font;
if(!font.loadFromFile("Calibri Regular.ttf")){
MessageBox(NULL, "Error loading font file: buttonFont.ttf in the system", "Font File Error", MB_OK | MB_ICONERROR);
}
Button openNotepad("Notepad", {90, 90}, 20, Color::Green, startTetxure);
openNotepad.setPosition({100, 300});
openNotepad.setFont(font);
while (window.isOpen())
{
Event event;
while (window.pollEvent(event))
{
switch(event.type){
case Event::Closed:
window.close();
cout << "Window has been removed" << endl;
break;
case Event::MouseMoved:
if(openNotepad.isMouseOver(window)){
openNotepad.setBackColor(Color(42,150,83));
openNotepad.setOutThick(1.5);
openNotepad.setOutColor(Color(255, 255, 255, 100));
}else{
openNotepad.setBackColor(Color(0,110,51));
openNotepad.setOutThick(0);
}
break;
case Event::MouseButtonPressed:
if(openNotepad.isMouseOver(window)){
cout << "You clicked the button" << endl;
}
break;
}
if(Keyboard::isKeyPressed(Keyboard::Key::S) && !isStartOpen){
startMenu.setPosition(0.0f, 75.0f);
isStartOpen = true;
}else{
startMenu.setPosition(0.0f, 500.0f);
isStartOpen = false;
}
window.draw(startMenu);
window.draw(player);
openNotepad.drawTo(window);
window.display();
window.clear(Color(1, 159, 255));
}
}
}
button.h
#pragma once
#include <iostream>
#include <SFML/graphics.hpp>
using namespace sf;
using namespace std;
class Button{
public:
Button(){
}
Button(string t, Vector2f size, int charSize, Color bgColor, Texture &texture){
text.setString(t);
text.setColor(Color::White);
text.setCharacterSize(charSize);
text.setScale(0.7f, 0.7f);
button.setSize(size);
button.setFillColor(bgColor);
button.setTexture(texture);
}
void setFont(Font &font){
text.setFont(font);
}
void setBackColor(Color color){
button.setFillColor(color);
}
void setTextColor(Color color){
text.setColor(color);
}
void setPosition(Vector2f pos){
button.setPosition(pos);
float xPos = (pos.x + button.getLocalBounds().width / 30) - (text.getLocalBounds().width / 2);
float yPos = (pos.y + button.getLocalBounds().height / 1.3) - (text.getLocalBounds().height / 2);
text.setPosition({xPos, yPos});
}
void drawTo(RenderWindow &window){
window.draw(button);
window.draw(text);
}
void setOutColor(Color outColor){
button.setOutlineColor(outColor);
}
void setOutThick(float outThick){
button.setOutlineThickness(outThick);
}
bool isMouseOver(RenderWindow &window){
float mouseX = Mouse::getPosition(window).x;
float mouseY = Mouse::getPosition(window).y;
float btnPosX = button.getPosition().x;
float btnPosY = button.getPosition().y;
float btnxPosWidth = button.getPosition().x + button.getLocalBounds().width;
float btnyPosWidth = button.getPosition().y + button.getLocalBounds().height;
if(mouseX < btnxPosWidth && mouseX > btnPosX && mouseY < btnyPosWidth && mouseY > btnPosY){
return true;
}
return false;
}
private:
RectangleShape button;
Text text;
};
Let us dissect the error.
button.h|18|error: no matching function for call to 'sf::RectangleShape::setTexture(sf::Texture&)'
This means that you are trying to call a function that does not exist.
What function are we trying to call? It looks like we are trying to call the setTexture function inside of sf::RectangleShape.
Let's look at the documentation for the function of the same name in sf::RectangleShape.
This function takes const Texture* texture as its first parameter. Let's look at the end of the error message again. It is trying to find a function that takes sf::Texture& as a parameter. The type it expects and the type you supply are different. sf::Texture& does not equal const Texture*, and there are no overloaded functions that take sf::Texture& as a parameter.
The solution is to get a const Texture* from a sf::Texture&.
The former is known as a pointer, (specifically a const pointer), and the latter is a reference (specifically a non-const reference).
You can get a pointer from a reference by using the address-of operator (&). So by calling &texture you can get the non-const pointer of the texture. The reverse can be done with the indirection operator (*).
A non-const pointer/reference can be implicitly changed to a const pointer/reference. This is one way and the reverse is not true.