我在绘制自定义sf::Drawable
派生对象时遇到问题。
//Textbox.h
#pragma once
#include "Header.h"
#ifndef TEXTBOX_H
#define TEXTBOX_H
class Textbox : public Drawable {
public:
Textbox(int max_chars, bool numeric);
Textbox(int max_chars);
Textbox(bool numeric);
Textbox();
void setTextColor(Color color);
void setPosition(float x, float y);
Vector2f getPosition() {
return m_gshape.getPosition();
}
Vector2f getSize();
String getString();
void setFocus(bool value);
bool isFocused();
void input(Uint32 text_char);
void clear();
private:
virtual void Textbox::draw(sf::RenderTarget& target, sf::RenderStates states) const {
target.draw(m_gshape, states);
target.draw(m_textbox, states);
}
unsigned int max_length;
int min_ascii = 32;
int max_ascii = 127;
bool focus;
string content;
Text m_textbox;
RectangleShape m_gshape;
};
#endif // !TEXTBOX_H
和
//Textbox.cpp
#pragma once
#include "Textbox.h"
Textbox::Textbox(int max_chars, bool numeric) {
max_length = max_chars;
m_gshape.setSize(Vector2f(6 + 15 * max_length, 30));
m_gshape.setFillColor(Color::White);
m_gshape.setOutlineThickness(2);
m_gshape.setOutlineColor(Color(60, 60, 60));
m_gshape.setPosition(0, 0);
m_textbox.setFont(default_font);
m_textbox.setCharacterSize(25);
m_textbox.setFillColor(Color::White);
if (max_chars > 1)
m_textbox.setString(to_string((int)pow(10, max_chars - 1)));
else
m_textbox.setString("0");
if (numeric) {
min_ascii = 47;
max_ascii = 58;
}
}
Textbox::Textbox(int max_chars) : Textbox(max_chars, false) {}
Textbox::Textbox(bool numeric) : Textbox(2, numeric) {}
Textbox::Textbox() : Textbox(2, false) {}
void Textbox::setTextColor(Color color) {
m_textbox.setFillColor(color);
}
void Textbox::setPosition(float x, float y) {
FloatRect textbox_bounds = m_textbox.getGlobalBounds();
m_gshape.setPosition(x, y);
m_textbox.setPosition(m_gshape.getPosition().x + (m_gshape.getSize().x - textbox_bounds.width) / 2 - textbox_bounds.left,
m_gshape.getPosition().y + (m_gshape.getSize().y - textbox_bounds.height) / 2 - textbox_bounds.top);
}
Vector2f Textbox::getSize() {
return m_gshape.getSize();
}
String Textbox::getString() {
return m_textbox.getString();
}
void Textbox::setFocus(bool value) {
focus = true;
}
bool Textbox::isFocused() {
return focus;
}
void Textbox::input(Uint32 text_char) {
content = m_textbox.getString().toAnsiString();
if (text_char == 13) {
focus = false;
return;
}
if (m_textbox.getString().getSize() < max_length) {
if (text_char > min_ascii && text_char < max_ascii) {
m_textbox.setString(m_textbox.getString() + text_char);
}
}
if (text_char == 8 && m_textbox.getString().getSize() > 0) {
content.resize(m_textbox.getString().getSize() - 1);
m_textbox.setString(content);
}
}
void Textbox::clear() {
m_textbox.setString("");
}
除了绘图部分之外,一切都有效:g_shape
被绘制并呈现m_textbox
没有。我确信这是因为我仍然可以编辑文本,但是它没有显示。
我必须承认我没有完全理解sf::Drawable
继承,因此我不确定我是否正确覆盖了draw()
。
答案 0 :(得分:1)
感谢@AlexMeuer我找到了解决方案。
在我的标题文件中,我的全局字体设置为extern sf::Font default_font
但是在main.cpp
我从未声明过它。