[英]How to center a bunch of controls programmatically in c#
我是這個社區的新手,並且我有這個應用程序可以通過編程添加控件。 我想將所有添加的控件居中,就像選擇它們並在Visual Studio上按center一樣。 不,我不想將每個人都放在一旁。 這是我用來獲取所有控件的代碼:
private void GetAllControl(Control c, List<Control> list)
{
//gets all controls and saves them to a list
foreach (Control control in c.Controls)
{
list.Add(control);
}
}
//And then call it like this
List<Control> list = new List<Control>();
GetAllControl(PNL_custom, list);
foreach (Play_panel m in list)
{
//And here I want to insert that center code
}
提前致謝,
VBTheory
“而且不,我不想將每個人都放在一邊。”
因此,您想“對齊”控件列表嗎?...如下所示:
格式->對齊->居中
格式->對齊->中線
如果是,則計算每個控件的中心並求和X,Y坐標,以便您可以計算“平均”點(質心)。 現在,您可以遍歷控件並將其用作對齊的X或Y值,具體取決於所需的方向。 只需減去寬度或高度的一半,並保持其他值即可。
就像是:
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
List<Control> list = new List<Control>();
GetAllControl(PNL_custom, list);
CenterControls(list, Direction.Vertical);
}
public enum Direction
{
Vertical,
Horizontal
}
private void CenterControls(List<Control> controls, Direction direction)
{
if (controls.Count > 1)
{
int xSum = 0;
int ySum = 0;
Point center;
foreach (Control ctl in controls)
{
center = new Point(ctl.Location.X + ctl.Width / 2, ctl.Location.Y + ctl.Height / 2);
xSum = xSum + center.X;
ySum = ySum + center.Y;
}
Point average = new Point(xSum / controls.Count, ySum / controls.Count);
foreach (Control ctl in controls)
{
switch (direction)
{
case Direction.Vertical:
ctl.Location = new Point(average.X - ctl.Width / 2, ctl.Location.Y);
break;
case Direction.Horizontal:
ctl.Location = new Point(ctl.Location.X, average.Y - ctl.Height / 2);
break;
}
}
}
}
private void GetAllControl(Control c, List<Control> list)
{
//gets all controls and saves them to a list
foreach (Control control in c.Controls)
{
list.Add(control);
}
}
}
這是將控件作為GROUP居中的方法。 它與以前幾乎相同,只是我們計算出該組的質心必須移動多遠才能成為父控件的中心。 然后,我們遍歷所有控件,並將它們的位置偏移那么多。 這使它們全部居中,同時保持彼此之間的相對位置:
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
List<Control> list = new List<Control>();
GetAllControl(PNL_custom, list);
CenterControlsAsGroup(list, Direction.Both); // center group in the center of the parent
}
public enum Direction
{
Vertical,
Horizontal,
Both
}
private void CenterControlsAsGroup(List<Control> controls, Direction direction)
{
if (controls.Count > 1)
{
int xSum = 0;
int ySum = 0;
Point center;
foreach (Control ctl in controls)
{
center = new Point(ctl.Location.X + ctl.Width / 2, ctl.Location.Y + ctl.Height / 2);
xSum = xSum + center.X;
ySum = ySum + center.Y;
}
Point average = new Point(xSum / controls.Count, ySum / controls.Count);
center = new Point(controls[0].Parent.Width / 2, controls[0].Parent.Height / 2);
int xOffset = center.X - average.X;
int yOffset = center.Y - average.Y;
foreach (Control ctl in controls)
{
switch (direction)
{
case Direction.Vertical:
ctl.Location = new Point(ctl.Location.X + xOffset, ctl.Location.Y);
break;
case Direction.Horizontal:
ctl.Location = new Point(ctl.Location.X, ctl.Location.Y + yOffset);
break;
case Direction.Both:
ctl.Location = new Point(ctl.Location.X + xOffset, ctl.Location.Y + yOffset);
break;
}
}
}
}
private void GetAllControl(Control c, List<Control> list)
{
//gets all controls and saves them to a list
foreach (Control control in c.Controls)
{
list.Add(control);
}
}
}
獲取控件的容器的寬度和高度(可以是另一個控件或窗體)。 控件的坐標是以像素為單位的相對於其容器左上角的距離(即(0,0))。 因此,您要做的就是將控件的x
坐標設置為(form width - control width) / 2
。 高度也一樣。
盡管所有控件都可以輕松地放在組框等中,但它們將被添加到容器(最有可能是窗體)中。
為了使它們在容器內居中對齊,您需要做一些數學運算並自己放置它們:)
在將控件置於容器中心之前,您需要找到容器的中點。 這將是容器的寬度/ 2:容器的高度/ 2。
我將使用一個名為cmdButton1的控件來突出顯示-您將要遍歷控件列表,然后依次對所有控件進行此操作。
int midParentX = cmdButton1.Parent.width / 2;
int midParentX = cmdButton1.Parent.height / 2;
然后,您可以將控件放置在此中點:
cmdButton1.Location.X = midParentX;
cmdButton1.Location.Y = midParentY;
但是,您的控件(在我的示例中為cmdButton)固定在控件的左上角(0,0)上,因此我們需要將其上下移動一半的寬度和高度
cmdButton1.Location.X -= (cmdButton1.width / 2);
cmdButton1.Location.Y -= (cmdButton1.height / 2);
更加相關:
foreach (Play_panel m in list)
{
int pX = m.Parent.width;
int pY = m.Parent.height;
m.Location.X = (pX / 2) - (m.width / 2);
m.Location.Y = (pY / 2) - (m.height / 2);
}
所以我以這種方式做到了:
public enum ArrangeOrientation : int {
None,
Horizonatal,
Vertical,
HorizontalGrid,
VerticalGrid,
TopLeftGrid,
TopRightGrid,
BottomLeftGrid,
BottomRightGrid
}
private void ArrangeButtons(List<Control> controls, List<Control> parents, ArrangeOrientation orientation, double shrinkFactor = 1d) {
if(controls == null) return;
if(parents == null) parents = new List<Control>();
List<Control> childs = new List<Control>();
Control parent = null;
foreach(Control ctrl in controls) {
if(parent == null && !parents.Contains(ctrl.Parent)) {
parents.Add(ctrl.Parent);
parent = ctrl.Parent;
}
if(parent == ctrl.Parent)
childs.Add(ctrl);
}
if(parent != null && childs.Count > 0) {
ArrangeControlsToGridLayout(childs, orientation, shrinkFactor);
ArrangeButtons(controls, parents, orientation, shrinkFactor);
}
}
private void ArrangeControlsToGridLayout(List<Control> controls, ArrangeOrientation orientation, double shrinkFactor = 1d) {
// do nothing if nothing set
if(orientation == ArrangeOrientation.None) return;
if(shrinkFactor == 0d|| shrinkFactor > 1d) shrinkFactor = 1d;
// buffer controls in separate list to avoid manipulating parameter
List<Control> ctrl = new List<Control>(controls.ToArray());
// remove invisible controls
int j = 0;
while(j < ctrl.Count) {
if(!ctrl[j].Visible) ctrl.RemoveAt(j);
else j++;
}
// loop arrangement
int count = ctrl.Count;
int xDelta, yDelta, xOffs, yOffs, y, x, columns, rows, parentWidth, parentHeight, xShrinkOffs, yShrinkOffs;
if(count >= 1) {
// parents size
parentWidth = ctrl[0].Parent.Width;
parentHeight = ctrl[0].Parent.Height;
// shrink factor offset
parentWidth = Convert.ToInt32(parentWidth * shrinkFactor);
parentHeight = Convert.ToInt32(parentHeight * shrinkFactor);
// shrink factor offset
xShrinkOffs = Convert.ToInt32((ctrl[0].Parent.Width - parentWidth) / 2d);
yShrinkOffs = Convert.ToInt32((ctrl[0].Parent.Height - parentHeight) / 2d);
// calculate columns rows grid layout
if(orientation == ArrangeOrientation.Horizonatal) {
rows = 1;
columns = count;
}
else if(orientation == ArrangeOrientation.Vertical) {
rows = count;
columns = 1;
}
else if(orientation == ArrangeOrientation.TopLeftGrid
|| orientation == ArrangeOrientation.TopRightGrid
|| orientation == ArrangeOrientation.BottomLeftGrid
|| orientation == ArrangeOrientation.BottomRightGrid) {
rows = 1;
columns = count;
}
else {
rows = Convert.ToInt32(Math.Floor(Math.Sqrt(count)));
if(Math.Sqrt(count) % 1d != 0d) rows++;
columns = count / rows + (count % rows != 0 ? 1 : 0);
}
if(orientation == ArrangeOrientation.HorizontalGrid) {
int swap = columns;
columns = rows;
rows = columns;
}
// calculate position offsets, grid distance
xDelta = parentWidth / count;
yDelta = parentHeight / count;
xOffs = xDelta / 2;
yOffs = yDelta / 2;
if(orientation == ArrangeOrientation.TopLeftGrid) {
}
else if(orientation == ArrangeOrientation.TopRightGrid) {
xOffs = parentWidth - xOffs;
xDelta = -xDelta;
}
else if(orientation == ArrangeOrientation.BottomLeftGrid) {
yOffs = parentHeight - yOffs;
yDelta = -yDelta;
}
else if(orientation == ArrangeOrientation.BottomRightGrid) {
xOffs = parentWidth - xOffs;
yOffs = parentHeight - yOffs;
xDelta = -xDelta;
yDelta = -yDelta;
}
else {
xDelta = parentWidth / columns;
yDelta = parentHeight / rows;
xOffs = xDelta / 2;
yOffs = yDelta / 2;
}
// fit controls in grid layout
Point pRoot = new Point(/*ctrl[0].Parent.Location.X + */xOffs, /*ctrl[0].Parent.Location.Y + */yOffs);
y = 0; x = 0;
for(int i = 0; i < count; i++) {
if(orientation == ArrangeOrientation.VerticalGrid) {
// actual x/y - points zero based index
y = Convert.ToInt32(Math.Floor((double)i % rows));
// next row? zero based index
if(i % rows == 0 && i != 0) x++;
}
else {
// actual x/y - points zero based index
x = Convert.ToInt32(Math.Floor((double)i % columns));
// next row? zero based index
if(i % columns == 0 && i != 0) y++;
if(orientation == ArrangeOrientation.TopLeftGrid
|| orientation == ArrangeOrientation.TopRightGrid
|| orientation == ArrangeOrientation.BottomLeftGrid
|| orientation == ArrangeOrientation.BottomRightGrid)
y = x;
} // assign controls to grid
ctrl[i].Location = new Point(pRoot.X + x * xDelta - ctrl[i].Size.Width / 2 + xShrinkOffs, pRoot.Y + y * yDelta - ctrl[i].Size.Height / 2 + yShrinkOffs);
}
}
}
當有多個控件時,上面的代碼將所有控件都放在另一個控件上。
我要做的就是將所有控件居中放置在面板中,但是將它們並排放置而不是一個放置在另一個放置上。
這是我修改的代碼(僅供參考,這會將控件集中在1行而不是多行中):
public enum Direction
{
Vertical,
Horizontal,
Both
}
public void CenterControls(List<Control> controls, Direction direction)
{
if (controls.Count > 1)
{
int controls_sum_width = 0;
int controls_seperation = 20;
int parentwidth = 0;
Point center;
foreach (Control ctl in controls)
{
controls_sum_width = controls_sum_width + ctl.Width + controls_seperation;
}
Point Container_center = new Point(controls[0].Parent.Width / 2, controls[0].Parent.Height / 2);
parentwidth = controls[0].Parent.Width;
int xoffset = (parentwidth - controls_sum_width) / 2;
int Location_X = 0;
foreach (Control ctl in controls)
{
center = new Point( ctl.Width / 2, ctl.Height / 2);
int yOffset = Container_center.Y - center.Y;
switch (direction)
{
case Direction.Vertical:
ctl.Location = new Point(ctl.Location.X + xoffset, ctl.Location.Y);
break;
case Direction.Horizontal:
ctl.Location = new Point(ctl.Location.X, yOffset);
break;
case Direction.Both:
ctl.Location = new Point(Location_X + xoffset, yOffset);
break;
}
Location_X = Location_X + ctl.Width+ controls_seperation;
}
}
else
{
Point parent_center;
Point center;
parent_center = new Point(controls[0].Parent.Width / 2, controls[0].Parent.Height / 2);
center = new Point(controls[0].Location.X + controls[0].Width / 2, controls[0].Location.Y + controls[0].Height / 2);
int xOffset = parent_center.X - center.X;
int yOffset = parent_center.Y - center.Y;
switch (direction)
{
case Direction.Vertical:
controls[0].Location = new Point(controls[0].Location.X + xOffset, controls[0].Location.Y);
break;
case Direction.Horizontal:
controls[0].Location = new Point(controls[0].Location.X, controls[0].Location.Y + yOffset);
break;
case Direction.Both:
controls[0].Location = new Point(controls[0].Location.X + xOffset, controls[0].Location.Y + yOffset);
break;
}
}
}
public void GetAllControl(Control c, List<Control> list)
{
//gets all controls and saves them to a list
foreach (Control control in c.Controls)
{
list.Add(control);
}
}
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