我的问题是我有8个pictureboxes，但每次只有一个会调用它们的绘制方法。
我的代码有点长，所以我尽可能地缩小了受影响的部分。
我最好的猜测是这不是我的代码中的一个错误，而是对绘制事件如何工作的误解。
我有一个从PictureBox继承的类，我使用它来代替Picturebox。唯一的变化是构造函数。
所以基本上，托盘有一张图片，7个字母也有图片。目前字母是在自己的picturebox里绘制的，但是会被放在托盘之上。我向托盘和字母添加了一个绘制方法，并将它们添加到pictureboxes的画板中。我需要字母具有单独的picturebox，因为以后我想添加功能，使它们可以通过鼠标点击进行拖动。
我的代码有点长，所以我尽可能地缩小了受影响的部分。
我最好的猜测是这不是我的代码中的一个错误，而是对绘制事件如何工作的误解。
我有一个从PictureBox继承的类，我使用它来代替Picturebox。唯一的变化是构造函数。
using System.Drawing;
using System.Windows.Forms;
public class DrawingSurface : PictureBox
{
public DrawingSurface(Rectangle bounds) : base() {
base.Dock = DockStyle.Fill;
base.SizeMode = PictureBoxSizeMode.Zoom;
//I set the size and bounds which is probably redundant because
//I was trying random things to fix the problem
base.Size = new Size(bounds.Width, bounds.Height);
base.Bounds = bounds;
base.Margin = new Padding(0) ;
base.BackColor = Color.Transparent;
}
}
public class MyForm:Form
{
public MyForm():base()
{
base.FormBorderStyle = FormBorderStyle.Sizable;
base.MaximizeBox = false;
base.MinimizeBox = false;
base.Bounds = Screen.PrimaryScreen.Bounds;
}
}
这是我的主要类
class Program
{
static int Main()
{
short boardOffsetX, boardOffsetY, trayOffsetX, trayOffsetY;
MyForm gameImage = null;
Tray playerTray = null;
ScrabbleBoard board = null;
BagOfLetters bag = null;
AppDomain currentDomain = AppDomain.CurrentDomain;
currentDomain.UnhandledException += new UnhandledExceptionEventHandler(MyHandler);//this line of code doesn't work either if any of you can spot anything obvious here.
//this is my hacky way of centering the images, wouldn't mind you telling me
//a better way of doing this either.
boardOffsetX = (short)(Screen.PrimaryScreen.Bounds.Width/4);
boardOffsetY = (short)(Screen.PrimaryScreen.Bounds.Height/8);
trayOffsetX = (short)(Screen.PrimaryScreen.Bounds.Width / 3.3);
trayOffsetY = (short)(Screen.PrimaryScreen.Bounds.Height / 24);
try
{
gameImage = new MyForm();
bag = new BagOfLetters();
board = new ScrabbleBoard(gameImage, new Point(boardOffsetX, boardOffsetY));
playerTray = new Tray(bag, trayOffsetX, trayOffsetY, gameImage);
gameImage.ShowDialog();
}
finally
{
//Dispose all
}
}
}
我的图像是这样绘制的。我有一个大类，其中包含一个大图像和7个较小的类及其图像。我尝试从我的大类中初始化所有内容。
public class Tray{
private Image TrayImage;
private DrawingSurface TraySurface;
private short OffsetY = 0;
private short OffsetX = 0;
public List<LB> Tray;
public Tray(Bag bag, short offsetX, short offsetY, MyForm gameImage)
{
Letter tmp;
//paramater validation
TrayImage = Image.FromFile(PATHOFTRAY);
//GetBoundsAsRectangle is just getting the image dimensions as a rectangle
TraySurface = new DrawingSurface(GetBoundsAsRectangle()) ;
TraySurface.Location = new Point(offsetX, offsetY);
this.OffsetX = offsetX;
this.OffsetY = offsetY;
do
{
tmp = bag.PullLetter();
}
while (AddLetter(tmp, gameImage));
//make this image draw
TraySurface.Paint += new PaintEventHandler(this.Draw);
gameImage.Controls.Add(TraySurface);
TraySurface.SendToBack();
}
public bool AddLetter(Letter letter, MyForm gameImage) {
//argument validation
Count++;
letter.PutOnTray(Count, OffsetX, OffsetY);
gameImage.Controls.Add(letter.GetDrawingSurface());
if (letterCount >= MAXLETTERS)
{
return false;
}
return true;
}
public void Paint(Object sender, PaintEventArgs drawEvent)
{
//paramater validation here
Rectangle rectangleAreaToDrawImage = new Rectangle(OffsetX,
OffsetY,
TrayImage.Width,
TrayImage.Height);
// Draw image to screen.
drawEvent.Graphics.DrawImage(TrayImage, rectangleAreaToDrawImage);
}
}
public class Letter
{
private Image LetterImage;
private DrawingSurface LetterSurface;
private int PositionOnTray;
public Letter(char value, String fName) {
LetterImage = Image.FromFile(fName);
LetterSurface = new DrawingSurface(GetBoundsAsRectangle());
}
public void PutOnTray(short position, short x, short y)
{
//validation
PositionOnTray = position;
TrayOffsetX = (short)(x + (position*20));
TrayOffsetY = y;
IsOnTray = true;
LetterSurface.Location = new Point(TrayOffsetX, TrayOffsetY);
LetterSurface.Paint += new PaintEventHandler(this.Draw);
}
public void Paint(Object sender, PaintEventArgs drawEvent)
{
int x = 0, y = 0;
//paramater validation here
x = (TrayOffsetX + (LetterImage.Width * PositionOnTray));
y = (TrayOffsetY + 6);
Location = new Rectangle(x,
y,
LetterImage.Width,
LetterImage.Image.Height);
drawEvent.Graphics.DrawImage(LetterImage, Location);
}
所以基本上，托盘有一张图片，7个字母也有图片。目前字母是在自己的picturebox里绘制的，但是会被放在托盘之上。我向托盘和字母添加了一个绘制方法，并将它们添加到pictureboxes的画板中。我需要字母具有单独的picturebox，因为以后我想添加功能，使它们可以通过鼠标点击进行拖动。
问题在于，绘图方法没有被调用。纯理论上，你会如何绘制这个东西？我来自Java/C/C++背景，图形从来不是我的重点，所以我确定它不是错误，而是我的做法不正确。
PictureBoxes的说明：它们有一个背景，就像所有控件一样，您可以在其 Paint 事件中绘制。但它们的主要特点是它们的图像，您可以设置和修改它；它会自己处理保持图像始终更新的工作。那么你在哪里画？在图像上还是背景上（如果您设置了图像，则背景将更多或更少被覆盖）？ - TaW