我目前正在 x 軸上創建一個由按鈕觸發的移動面板，winform它工作得很好，但現在我想在每次單擊按鈕時添加多個面板。問題是我通過工具箱創建了面板并將其附加在 a 上timer_tick event，我相信這只能完成一次，所以我的計劃是創建一個動態面板和計時器不知道它是否是正確的方法。這是我的代碼 private void button2_Click(object sender, EventArgs e) { start(); } private void start(){ timer1.Enabled = true; } private void timer1_Tick(object sender, EventArgs e ) { panel_1.BackColor = Color.Green; int x = panel_1.Location.X; int y = panel_1.Location.Y; panel_1.Location = new Point(x + 25, y); xy_text.Text = x + ","+ y; if (x > this.Width) { timer1.Stop(); } }
3 回答
月關寶盒
TA貢獻1772條經驗 獲得超5個贊
? ? private List<Panel> _panels = new List<Panel>(); //class level list to track the panels
? ? private void button2_Click(object sender, EventArgs e)
? ? {
? ? ? ? //create a new panel when the button is clicked
? ? ? ? var p = new Panel();
? ? ? ? p.Size = new Size(10, 10);
? ? ? ? p.Location = new Point(10, DateTime.Now.Second * (this.Height / 60)); //"random" Y so they don't pile up
? ? ? ? p.BackColor = Color.Green;
? ? ? ? this.Controls.Add(p);? ? ? ? ? ? ? ? ? ? ? ? ? ?//add panel to form
? ? ? ? _panels.Add(p);? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?//add panel to list
? ? ? ? timer1.Enabled = true;? ? ? ? ? ? ? ? ? ? ? ? ? //animate
? ? }
? ? private void timer1_Tick(object sender, EventArgs e)
? ? {
? ? ? ? for (int i = _panels.Count - 1; i >= 0; i--)? ? //use a backwards int indexed loop because we are potentially removing items from the list.?
? ? ? ? {? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?//Working backwards is the easiest way to not have to fiddle the index upon removal
? ? ? ? ? ? var p = _panels[i];? ? ? ? ? ? ? ? ? ? ? ? ?//temp reference to a panel in the list, not related to 'var p' in the button click
? ? ? ? ? ? p.Left += 25;? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?//move it
? ? ? ? ? ? if (p.Left > this.Width)? ? ? ? ? ? ? ? ? ? //panel that is off screen?
? ? ? ? ? ? ? ? _panels.RemoveAt(i);? ? ? ? ? ? ? ? ? ? //stop moving it then
? ? ? ? }
? ? ? ? if (_panels.Count == 0)? ? ? ? ? ? ? ? ? ? ? ? ?//no more panels to move?
? ? ? ? ? ? timer1.Stop();? ? ? ? ? ? ? ? ? ? ? ? ? ? ? //stop the timer
? ? }
this.Controls如果您不再使用不可見的面板，您應該考慮實現一些邏輯，將其從集合中刪除。
Qyouu
TA貢獻1786條經驗 獲得超11個贊
這是我寫的一個簡單的例子，這里我使用 1 個計時器來處理所有面板，如果你想讓它更平滑，使運動增量更?。◤?25 到更低）并增加計時器的滴答率，你也可以嘗試單獨為每個面板使用一個計時器，但在我看來這有點過分了。
編輯：如果您想要真正精確的定位和動畫，則需要使用更精確的雙精度移動，并舍入為動畫本身的整數，請使用 DateTime.Now 來非常精確地確定給定時間內行駛的距離，計時器不會t 確定距離，它只更新位置：
public partial class MainForm : Form
{
// X directional speed in pixels per second
const int XSpeed = 400;
private List<AnimationPanel> _panels = new List<AnimationPanel>();
public MainForm()
{
InitializeComponent();
}
private void OnButtonStartClick(object sender, System.EventArgs e)
{
AnimationPanel newPanel = new AnimationPanel
{
Bounds = new Rectangle(10, 10, 50, 50),
BorderStyle = BorderStyle.FixedSingle,
};
_panels.Add(newPanel);
Controls.Add(newPanel);
newPanel.StartBounds = newPanel.Bounds;
newPanel.StartTime = DateTime.Now;
_timer.Enabled = true;
}
private void OnTimerTick(object sender, System.EventArgs e)
{
for (int i = _panels.Count - 1; i >= 0; i--)
{
AnimationPanel currentPanel = _panels[i];
DateTime startTime = currentPanel.StartTime;
int xDelta = (int)Math.Round((DateTime.Now - startTime).TotalSeconds * XSpeed, 0);
Point newLocation = new Point(currentPanel.StartBounds.X + xDelta, currentPanel.StartBounds.Y);
// Check before or after collision (in this example before replacing the AnimationPanel)
if (newLocation.X > this.Width)
{
// I chose to remove after it reaches the edge, do whatever you want
_panels.RemoveAt(i);
Controls.Remove(currentPanel);
}
else
{
currentPanel.Location = newLocation;
}
}
if (_panels.Count == 0)
{
_timer.Enabled = false;
}
}
private class AnimationPanel : Panel
{
public Rectangle StartBounds { get; set; }
public DateTime StartTime { get; set; }
}
}
慕妹3146593
TA貢獻1820條經驗 獲得超9個贊
您可以使用如下代碼創建面板：
// init properties
var newPanel = new Panel
{
Name="Panel1",
BackColor = Color.Green,
Location = new Point(0, 0), // set the starting point
Width = 100, Height = 100
};
Controls.Add(newPanel);
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