我的问题是我有 8 个图片框,但一次只有其中一个调用其绘制方法。
我的代码有点太大,所以我尝试尽可能地将其范围缩小到受影响的部分。
我最好的猜测是,这并不是我的代码中的错误,而是对绘制事件如何工作的误解。
我有一个继承自 PictureBox 的类,我正在使用它而不是 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;
}
}
这是我的主要课程
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
}
}
}
我的图像是这样画的。我有一个带有大图像的大类,其中包含 7 个较小的类及其图像。我尝试初始化我的大班中的所有内容。
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);
}
所以基本上托盘上有一个图像,7 个字母也有图像。这些字母现在绘制在托盘顶部,但在它们自己的图片框中。我向托盘和字母添加了绘制方法,并将它们添加到图片框 Paint 中。我需要这些字母有单独的图片框,因为稍后我想添加功能,通过单击鼠标将它们拾取并在屏幕上拖动。
问题是绘制方法没有被调用。从理论上来说,用伪代码,你会如何画这个?我有 Java/C/C++ 背景,图形从来都不是我关注的焦点,所以我确信这不是一个错误,而是我处理这个问题的方式是错误的。