我有一个带有Painter模板函数的paint()模板类。我使用标记来专门化模板类中的模板函数。我将模板函数paint()的定义放在Painter.h中,重载函数放在Painter.cpp中。
当我在paint()中显式实例化Painter.cpp时,会得到编译器错误。我的要求是需要在文件paint(ColorTag<Color::RED>) .中实现重载函数。
源文件如下:
Painter.h
#include <iostream>
enum class Color {
RED = 0,
GREEN = 1,
BLUE = 2
};
tem
# Imported Modules for Randomization and Turtle
import turtle as trtl
import random as rand
from random import *
# Painter Configuration and Screen Configuration
painter = trtl.Turtle()
distanceForward = 20
painter.pensize(5)
painter.speed(10000000)
painter.screen.setup(1000, 1000)
walls = 32
#T
我正在尝试在我的Painter类中保存一个指向Form1的指针。我的尝试是:
class Painter {
private Form _form;
public void setFormPtr( Form form ) {
_form = form;
}
}
public partial class Form1 : Form {
Painter painter;
public Form1() {
InitializeComponent();
painter.setFormPtr( this );
我想问你一个问题。当我第一次单击listwidget的项目时,我看到应用程序输出中有一些文本行:
QPainter::begin: Paint device returned engine == 0, type: 3
QPainter::setWorldTransform: Painter not active
QPainter::worldTransform: Painter not active
QPainter::setWorldTransform: Painter not active
QPainter::setBrush: Painter not active
QPainter::s
我正在尝试在单击后重新绘制列表小部件项,但我在使用QPainter时遇到了一些问题。代码“可以工作”,但在每次重新绘制图形用户界面时,它都会有相当大的延迟,并输出下面的警告,并且不知道是什么原因导致它,因为它都是在paintEvent中完成的(可能我没有正确地交换QPainter对象?) 每次重新绘制时,GUI都会冻结并输出: QWidget::paintEngine: Should no longer be called
QPainter::begin: Paint device returned engine == 0, type: 1
QPainter::setRenderHint:
我已经编写了一个具有大量代码库(大约30k行)的应用程序,有时,当它占用大量cpu时,shell输出会填充以下内容:
QPainter::scale: Painter not active
QPainter::setCompositionMode: Painter not active
QPainter::scale: Painter not active
QPainter::setRenderHint: Painter must be active to set rendering hints
QPainter::setPen: Painter not active
QPainter::en
添加image_painter: ^0.4.5时出错
我试图将这个库添加到我的新项目中,但是我得到了如下错误:
Because every version of flutter_test from sdk depends on vector_math 2.1.0 and image_painter >=0.4.5 <1.0.0-nullsafety.0 depends on vector_math ^2.1.1, flutter_test from sdk is incompatible with image_painter >=0.4.5 <1.0.0-nullsaf
这是一个普通的TS项目。没有框架。 我有一个作者模拟addEventListener方法的followed through this article here (不过是在窗口上)。 我搞不懂为什么被模拟的函数没有注册为被调用。 console.log
called in here
at Object.handleClick [as click] (src/painter/painter.ts:24:13)
FAIL src/painter/painter.test.ts
Painter Setup
✕ Should add event handler