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Doghole
2026-01-07 11:33:05 +08:00
commit fc54ffd43b
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ICSharpCode.TextEditor/Project/Src/Gui/CompletionWindow/AbstractCompletionWindow.cs Normal file
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// <file>
// <copyright see="prj:///doc/copyright.txt"/>
// <license see="prj:///doc/license.txt"/>
// <owner name="Mike Krüger" email="mike@icsharpcode.net"/>
// <version>$Revision$</version>
// </file>
using System;
using System.Drawing;
using System.Windows.Forms;
namespace ICSharpCode.TextEditor.Gui.CompletionWindow
{
/// <summary>
/// Description of AbstractCompletionWindow.
/// </summary>
public abstract class AbstractCompletionWindow : System.Windows.Forms.Form
{
protected TextEditorControl control;
protected Size drawingSize;
Rectangle workingScreen;
Form parentForm;
protected AbstractCompletionWindow(Form parentForm, TextEditorControl control)
{
workingScreen = Screen.GetWorkingArea(parentForm);
// SetStyle(ControlStyles.Selectable, false);
this.parentForm = parentForm;
this.control = control;
SetLocation();
StartPosition = FormStartPosition.Manual;
FormBorderStyle = FormBorderStyle.None;
ShowInTaskbar = false;
MinimumSize = new Size(1, 1);
Size = new Size(1, 1);
}
protected virtual void SetLocation()
{
TextArea textArea = control.ActiveTextAreaControl.TextArea;
TextLocation caretPos = textArea.Caret.Position;
int xpos = textArea.TextView.GetDrawingXPos(caretPos.Y, caretPos.X);
int rulerHeight = textArea.TextEditorProperties.ShowHorizontalRuler ? textArea.TextView.FontHeight : 0;
Point pos = new Point(textArea.TextView.DrawingPosition.X + xpos,
textArea.TextView.DrawingPosition.Y + (textArea.Document.GetVisibleLine(caretPos.Y)) * textArea.TextView.FontHeight
- textArea.TextView.TextArea.VirtualTop.Y + textArea.TextView.FontHeight + rulerHeight);
Point location = control.ActiveTextAreaControl.PointToScreen(pos);
// set bounds
Rectangle bounds = new Rectangle(location, drawingSize);
if (!workingScreen.Contains(bounds)) {
if (bounds.Right > workingScreen.Right) {
bounds.X = workingScreen.Right - bounds.Width;
}
if (bounds.Left < workingScreen.Left) {
bounds.X = workingScreen.Left;
}
if (bounds.Top < workingScreen.Top) {
bounds.Y = workingScreen.Top;
}
if (bounds.Bottom > workingScreen.Bottom) {
bounds.Y = bounds.Y - bounds.Height - control.ActiveTextAreaControl.TextArea.TextView.FontHeight;
if (bounds.Bottom > workingScreen.Bottom) {
bounds.Y = workingScreen.Bottom - bounds.Height;
}
}
}
Bounds = bounds;
}
protected override CreateParams CreateParams {
get {
CreateParams p = base.CreateParams;
AddShadowToWindow(p);
return p;
}
}
static int shadowStatus;
/// <summary>
/// Adds a shadow to the create params if it is supported by the operating system.
/// </summary>
public static void AddShadowToWindow(CreateParams createParams)
{
if (shadowStatus == 0) {
// Test OS version
shadowStatus = -1; // shadow not supported
if (Environment.OSVersion.Platform == PlatformID.Win32NT) {
Version ver = Environment.OSVersion.Version;
if (ver.Major > 5 || ver.Major == 5 && ver.Minor >= 1) {
shadowStatus = 1;
}
}
}
if (shadowStatus == 1) {
createParams.ClassStyle |= 0x00020000; // set CS_DROPSHADOW
}
}
protected override bool ShowWithoutActivation {
get {
return true;
}
}
protected void ShowCompletionWindow()
{
Owner = parentForm;
Enabled = true;
this.Show();
control.Focus();
if (parentForm != null) {
parentForm.LocationChanged += new EventHandler(this.ParentFormLocationChanged);
}
control.ActiveTextAreaControl.VScrollBar.ValueChanged += new EventHandler(ParentFormLocationChanged);
control.ActiveTextAreaControl.HScrollBar.ValueChanged += new EventHandler(ParentFormLocationChanged);
control.ActiveTextAreaControl.TextArea.DoProcessDialogKey += new DialogKeyProcessor(ProcessTextAreaKey);
control.ActiveTextAreaControl.Caret.PositionChanged += new EventHandler(CaretOffsetChanged);
control.ActiveTextAreaControl.TextArea.LostFocus += new EventHandler(this.TextEditorLostFocus);
control.Resize += new EventHandler(ParentFormLocationChanged);
foreach (Control c in Controls) {
c.MouseMove += ControlMouseMove;
}
}
void ParentFormLocationChanged(object sender, EventArgs e)
{
SetLocation();
}
public virtual bool ProcessKeyEvent(char ch)
{
return false;
}
protected virtual bool ProcessTextAreaKey(Keys keyData)
{
if (!Visible) {
return false;
}
switch (keyData) {
case Keys.Escape:
Close();
return true;
}
return false;
}
protected virtual void CaretOffsetChanged(object sender, EventArgs e)
{
}
protected void TextEditorLostFocus(object sender, EventArgs e)
{
if (!control.ActiveTextAreaControl.TextArea.Focused && !this.ContainsFocus) {
Close();
}
}
protected override void OnClosed(EventArgs e)
{
base.OnClosed(e);
// take out the inserted methods
parentForm.LocationChanged -= new EventHandler(ParentFormLocationChanged);
foreach (Control c in Controls) {
c.MouseMove -= ControlMouseMove;
}
if (control.ActiveTextAreaControl.VScrollBar != null) {
control.ActiveTextAreaControl.VScrollBar.ValueChanged -= new EventHandler(ParentFormLocationChanged);
}
if (control.ActiveTextAreaControl.HScrollBar != null) {
control.ActiveTextAreaControl.HScrollBar.ValueChanged -= new EventHandler(ParentFormLocationChanged);
}
control.ActiveTextAreaControl.TextArea.LostFocus -= new EventHandler(this.TextEditorLostFocus);
control.ActiveTextAreaControl.Caret.PositionChanged -= new EventHandler(CaretOffsetChanged);
control.ActiveTextAreaControl.TextArea.DoProcessDialogKey -= new DialogKeyProcessor(ProcessTextAreaKey);
control.Resize -= new EventHandler(ParentFormLocationChanged);
Dispose();
}
protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
ControlMouseMove(this, e);
}
/// <summary>
/// Invoked when the mouse moves over this form or any child control.
/// Shows the mouse cursor on the text area if it has been hidden.
/// </summary>
/// <remarks>
/// Derived classes should attach this handler to the MouseMove event
/// of all created controls which are not added to the Controls
/// collection.
/// </remarks>
protected void ControlMouseMove(object sender, MouseEventArgs e)
{
control.ActiveTextAreaControl.TextArea.ShowHiddenCursor(false);
}
}
}