flashdevelop/PluginCore/TabControl/CustomTabControl.cs at patch-1 · SandersAlex/flashdevelop · GitHub

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* This code is provided under the Code Project Open Licence (CPOL)

* See http://www.codeproject.com/info/cpol10.aspx for details

using System.Collections.Generic;

using System.ComponentModel;

using System.Drawing;

using System.Drawing.Drawing2D;

using System.Drawing.Imaging;

using System.Security.Permissions;

namespace System.Windows.Forms

{

[ToolboxBitmapAttribute(typeof(TabControl))]

public class CustomTabControl : TabControl

{

#region Construction

public CustomTabControl(){

this.SetStyle(ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint | ControlStyles.Opaque | ControlStyles.ResizeRedraw , true);

this._BackBuffer = new Bitmap(this.Width, this.Height);

this._BackBufferGraphics = Graphics.FromImage(this._BackBuffer);

this._TabBuffer = new Bitmap(this.Width, this.Height);

this._TabBufferGraphics = Graphics.FromImage(this._TabBuffer);

this.DisplayStyle = TabStyle.Default;

}

protected override void OnCreateControl(){

base.OnCreateControl();

this.OnFontChanged(EventArgs.Empty);

}

protected override CreateParams CreateParams

{

[SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)]

get

{

CreateParams cp = base.CreateParams;

if (this.RightToLeftLayout)

cp.ExStyle = cp.ExStyle | NativeMethods.WS_EX_LAYOUTRTL | NativeMethods.WS_EX_NOINHERITLAYOUT;

return cp;

}

protected override void Dispose(bool disposing)

{

base.Dispose(disposing);

if (disposing) {

if (this._BackImage != null){

this._BackImage.Dispose();

}

if (this._BackBufferGraphics != null){

this._BackBufferGraphics.Dispose();

}

if (this._BackBuffer != null){

this._BackBuffer.Dispose();

}

if (this._TabBufferGraphics != null){

this._TabBufferGraphics.Dispose();

}

if (this._TabBuffer != null){

this._TabBuffer.Dispose();

}

if (this._StyleProvider != null){

this._StyleProvider.Dispose();

}

#endregion

#region Private variables

private Bitmap _BackImage;

private Bitmap _BackBuffer;

private Graphics _BackBufferGraphics;

private Bitmap _TabBuffer;

private Graphics _TabBufferGraphics;

private int _oldValue;

private Point _dragStartPosition = Point.Empty;

private TabStyle _Style;

private TabStyleProvider _StyleProvider;

private List<TabPage> _TabPages;

#endregion

#region Public properties

[Category("Appearance"), DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]

public TabStyleProvider DisplayStyleProvider {

get {

if (this._StyleProvider == null){

this.DisplayStyle = TabStyle.Default;

}

return this._StyleProvider;

}

set {

this._StyleProvider = value;

}

[Category("Appearance"), DefaultValue(typeof(TabStyle), "Default"), RefreshProperties(RefreshProperties.All)]

public TabStyle DisplayStyle {

get { return this._Style; }

set {

if (this._Style != value){

this._Style = value;

this._StyleProvider = TabStyleProvider.CreateProvider(this);

this.Invalidate();

}

[Category("Appearance"), RefreshProperties(RefreshProperties.All)]

public new bool Multiline {

get {

return base.Multiline;

}

set {

base.Multiline = value;

this.Invalidate();

}

// Hide the Padding attribute so it can not be changed

// We are handling this on the Style Provider

[Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]

public new Point Padding {

get { return this.DisplayStyleProvider.Padding; }

set {

this.DisplayStyleProvider.Padding = value;

}

public override bool RightToLeftLayout {

get { return base.RightToLeftLayout; }

set {

base.RightToLeftLayout = value;

this.UpdateStyles();

}

// Hide the HotTrack attribute so it can not be changed

// We are handling this on the Style Provider

[Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]

public new bool HotTrack {

get { return this.DisplayStyleProvider.HotTrack; }

set {

this.DisplayStyleProvider.HotTrack = value;

}

[Category("Appearance")]

public new TabAlignment Alignment {

get { return base.Alignment; }

set {

base.Alignment = value;

switch (value) {

case TabAlignment.Top:

case TabAlignment.Bottom:

this.Multiline = false;

break;

case TabAlignment.Left:

case TabAlignment.Right:

this.Multiline = true;

break;

}

// Hide the Appearance attribute so it can not be changed

// We don't want it as we are doing all the painting.

[Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]

[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId = "value")]

public new TabAppearance Appearance{

get{

return base.Appearance;

}

set{

// Don't permit setting to other appearances as we are doing all the painting

base.Appearance = TabAppearance.Normal;

}

public override Rectangle DisplayRectangle {

get {

// Special processing to hide tabs

if (this._Style == TabStyle.None) {

return new Rectangle(0, 0, Width, Height);

} else {

int tabStripHeight = 0;

int itemHeight = 0;

if (this.Alignment <= TabAlignment.Bottom) {

itemHeight = this.ItemSize.Height;

} else {

itemHeight = this.ItemSize.Width;

}

tabStripHeight = 5 + (itemHeight * this.RowCount);

Rectangle rect = new Rectangle(4, tabStripHeight, Width - 8, Height - tabStripHeight - 4);

switch (this.Alignment) {

case TabAlignment.Top:

rect = new Rectangle(4, tabStripHeight, Width - 8, Height - tabStripHeight - 4);

break;

case TabAlignment.Bottom:

rect = new Rectangle(4, 4, Width - 8, Height - tabStripHeight - 4);

break;

case TabAlignment.Left:

rect = new Rectangle(tabStripHeight, 4, Width - tabStripHeight - 4, Height - 8);

break;

case TabAlignment.Right:

rect = new Rectangle(4, 4, Width - tabStripHeight - 4, Height - 8);

break;

}

return rect;

}

[Browsable(false)]

public int ActiveIndex {

get {

NativeMethods.TCHITTESTINFO hitTestInfo = new NativeMethods.TCHITTESTINFO(this.PointToClient(Control.MousePosition));

int index = NativeMethods.SendMessage(this.Handle, NativeMethods.TCM_HITTEST, IntPtr.Zero, NativeMethods.ToIntPtr(hitTestInfo)).ToInt32();

if (index == -1){

return -1;

} else {

if (this.TabPages[index].Enabled){

return index;

} else {

return -1;

}

[Browsable(false)]

public TabPage ActiveTab{

get{

int activeIndex = this.ActiveIndex;

if (activeIndex > -1){

return this.TabPages[activeIndex];

} else {

return null;

}

#endregion

#region Extension methods

public void HideTab(TabPage page){

if (page != null && this.TabPages.Contains(page)){

this.BackupTabPages();

this.TabPages.Remove(page);

}

public void HideTab(int index){

if (this.IsValidTabIndex(index)){

this.HideTab(this._TabPages[index]);

}

public void HideTab(string key){

if (this.TabPages.ContainsKey(key)){

this.HideTab(this.TabPages[key]);

}

public void ShowTab(TabPage page){

if (page != null){

if (this._TabPages != null){

if (!this.TabPages.Contains(page)

&& this._TabPages.Contains(page)){

// Get insert point from backup of pages

int pageIndex = this._TabPages.IndexOf(page);

if (pageIndex > 0){

int start = pageIndex -1;

// Check for presence of earlier pages in the visible tabs

for (int index = start; index >= 0; index--){

if (this.TabPages.Contains(this._TabPages[index])){

// Set insert point to the right of the last present tab

pageIndex = this.TabPages.IndexOf(this._TabPages[index]) + 1;

break;

}

// Insert the page, or add to the end

if ((pageIndex >= 0) && (pageIndex < this.TabPages.Count)){

this.TabPages.Insert(pageIndex, page);

} else {

this.TabPages.Add(page);

}

} else {

// If the page is not found at all then just add it

if (!this.TabPages.Contains(page)){

this.TabPages.Add(page);

}

public void ShowTab(int index){

if (this.IsValidTabIndex(index)){

this.ShowTab(this._TabPages[index]);

}

public void ShowTab(string key){

if (this._TabPages != null){

TabPage tab = this._TabPages.Find(delegate(TabPage page){return page.Name.Equals(key, StringComparison.OrdinalIgnoreCase);});

this.ShowTab(tab);

}

private bool IsValidTabIndex(int index){

this.BackupTabPages();

return ((index >= 0) && (index < this._TabPages.Count));

}

private void BackupTabPages(){

if (this._TabPages == null){

this._TabPages = new List<TabPage>();

foreach (TabPage page in this.TabPages){

this._TabPages.Add(page);

}

#endregion

#region Drag 'n' Drop

protected override void OnMouseDown(MouseEventArgs e){

base.OnMouseDown(e);

if (this.AllowDrop){

this._dragStartPosition = new Point(e.X, e.Y);

}

protected override void OnMouseUp(MouseEventArgs e){

base.OnMouseUp(e);

if (this.AllowDrop){

this._dragStartPosition = Point.Empty;

}

protected override void OnDragOver(DragEventArgs drgevent){

base.OnDragOver(drgevent);

if (drgevent.Data.GetDataPresent(typeof(TabPage))){

drgevent.Effect = DragDropEffects.Move;

} else {

drgevent.Effect = DragDropEffects.None;

}

protected override void OnDragDrop(DragEventArgs drgevent){

base.OnDragDrop(drgevent);

if (drgevent.Data.GetDataPresent(typeof(TabPage)))

{

drgevent.Effect = DragDropEffects.Move;

TabPage dragTab = (TabPage)drgevent.Data.GetData(typeof(TabPage));

if (this.ActiveTab == dragTab){

return;

}

// Capture insert point and adjust for removal of tab

// We cannot assess this after removal as differeing tab sizes will cause

// inaccuracies in the activeTab at insert point.

int insertPoint = this.ActiveIndex;

if (dragTab.Parent.Equals(this) && this.TabPages.IndexOf(dragTab) < insertPoint){

insertPoint --;

}

if (insertPoint < 0){

insertPoint = 0;

}

// Remove from current position (could be another tabcontrol)

((TabControl)dragTab.Parent).TabPages.Remove(dragTab);

// Add to current position

this.TabPages.Insert(insertPoint, dragTab);

this.SelectedTab = dragTab;

// deal with hidden tab handling?

}

private void StartDragDrop(){

if (!this._dragStartPosition.IsEmpty){

TabPage dragTab = this.SelectedTab;

if (dragTab != null){

// Test for movement greater than the drag activation trigger area

Rectangle dragTestRect = new Rectangle(this._dragStartPosition, Size.Empty);

dragTestRect.Inflate(SystemInformation.DragSize);

Point pt = this.PointToClient(Control.MousePosition);

if (!dragTestRect.Contains(pt)){

this.DoDragDrop(dragTab, DragDropEffects.All);

this._dragStartPosition = Point.Empty;

}

#endregion

#region Events

[Category("Action")] public event ScrollEventHandler HScroll;

[Category("Action")] public event EventHandler<TabControlEventArgs> TabImageClick;

[Category("Action")] public event EventHandler<TabControlCancelEventArgs> TabClosing;

#endregion

#region Base class event processing

protected override void OnFontChanged(EventArgs e){

IntPtr hFont = this.Font.ToHfont();

NativeMethods.SendMessage(this.Handle, NativeMethods.WM_SETFONT, hFont, (IntPtr)(-1));

NativeMethods.SendMessage(this.Handle, NativeMethods.WM_FONTCHANGE, IntPtr.Zero, IntPtr.Zero);

this.UpdateStyles();

if (this.Visible){

this.Invalidate();

}

protected override void OnResize(EventArgs e)

{

// Recreate the buffer for manual double buffering

if (this.Width > 0 && this.Height > 0){

if (this._BackImage != null){

this._BackImage.Dispose();

this._BackImage = null;

}

if (this._BackBufferGraphics != null){

this._BackBufferGraphics.Dispose();

}

if (this._BackBuffer != null){

this._BackBuffer.Dispose();

}

this._BackBuffer = new Bitmap(this.Width, this.Height);

this._BackBufferGraphics = Graphics.FromImage(this._BackBuffer);

if (this._TabBufferGraphics != null){

this._TabBufferGraphics.Dispose();

}

if (this._TabBuffer != null){

this._TabBuffer.Dispose();

}

this._TabBuffer = new Bitmap(this.Width, this.Height);

this._TabBufferGraphics = Graphics.FromImage(this._TabBuffer);

if (this._BackImage != null){

this._BackImage.Dispose();

this._BackImage = null;

}

base.OnResize(e);

}

protected override void OnParentBackColorChanged(EventArgs e){

if (this._BackImage != null){

this._BackImage.Dispose();

this._BackImage = null;

}

base.OnParentBackColorChanged(e);

}

protected override void OnParentBackgroundImageChanged(EventArgs e){

if (this._BackImage != null){

this._BackImage.Dispose();

this._BackImage = null;

}

base.OnParentBackgroundImageChanged(e);

}

private void OnParentResize(object sender, EventArgs e){

if (this.Visible){

this.Invalidate();

}

protected override void OnParentChanged(EventArgs e){

base.OnParentChanged(e);

if (this.Parent != null){

this.Parent.Resize += this.OnParentResize;

}

protected override void OnSelecting(TabControlCancelEventArgs e)

{

base.OnSelecting(e);

// Do not allow selecting of disabled tabs

if (e.Action == TabControlAction.Selecting && e.TabPage != null && !e.TabPage.Enabled){

e.Cancel = true;

}

protected override void OnMove(EventArgs e){

if (this.Width > 0 && this.Height > 0){

if (this._BackImage != null){

this._BackImage.Dispose();

this._BackImage = null;

}

base.OnMove(e);

this.Invalidate();

}

protected override void OnControlAdded(ControlEventArgs e){

base.OnControlAdded(e);

if (this.Visible){

this.Invalidate();

}

protected override void OnControlRemoved(ControlEventArgs e){

base.OnControlRemoved(e);

if (this.Visible){

this.Invalidate();

}

[UIPermission(SecurityAction.LinkDemand, Window = UIPermissionWindow.AllWindows)]

protected override bool ProcessMnemonic(char charCode){

foreach (TabPage page in this.TabPages){

if (IsMnemonic(charCode, page.Text)){

this.SelectedTab = page;

return true;

}

return base.ProcessMnemonic(charCode);

}

protected override void OnSelectedIndexChanged(EventArgs e){

base.OnSelectedIndexChanged(e);

}

[SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)]

[System.Diagnostics.DebuggerStepThrough()]

protected override void WndProc(ref Message m){

switch (m.Msg) {

case NativeMethods.WM_HSCROLL:

// Raise the scroll event when the scroller is scrolled

base.WndProc(ref m);

this.OnHScroll(new ScrollEventArgs(((ScrollEventType)NativeMethods.LoWord(m.WParam)),_oldValue, NativeMethods.HiWord(m.WParam), ScrollOrientation.HorizontalScroll));

break;

// case NativeMethods.WM_PAINT:

// // Handle painting ourselves rather than call the base OnPaint.

// CustomPaint(ref m);

// break;

default:

base.WndProc(ref m);

break;

}

protected override void OnMouseClick(MouseEventArgs e){

int index = this.ActiveIndex;

// If we are clicking on an image then raise the ImageClicked event before raising the standard mouse click event

// if there if a handler.

if (index > -1 && this.TabImageClick != null

&& (this.TabPages[index].ImageIndex > -1 || !string.IsNullOrEmpty(this.TabPages[index].ImageKey))

&& this.GetTabImageRect(index).Contains(this.MousePosition)){

this.OnTabImageClick(new TabControlEventArgs(this.TabPages[index], index, TabControlAction.Selected));

// Fire the base event

base.OnMouseClick(e);

} else if (!this.DesignMode && index > -1 && this._StyleProvider.ShowTabCloser && this.GetTabCloserRect(index).Contains(this.MousePosition)){

// If we are clicking on a closer then remove the tab instead of raising the standard mouse click event

// But raise the tab closing event first

TabPage tab = this.ActiveTab;

TabControlCancelEventArgs args = new TabControlCancelEventArgs(tab, index, false, TabControlAction.Deselecting);

this.OnTabClosing(args);

if (!args.Cancel){

this.TabPages.Remove(tab);

tab.Dispose();

}

} else {

// Fire the base event

base.OnMouseClick(e);

}

protected virtual void OnTabImageClick(TabControlEventArgs e){

if (this.TabImageClick != null){

this.TabImageClick(this, e);

}

protected virtual void OnTabClosing(TabControlCancelEventArgs e){

if (this.TabClosing != null){

this.TabClosing(this, e);

}

protected virtual void OnHScroll(ScrollEventArgs e){

// repaint the moved tabs

this.Invalidate();

// Raise the event

if (this.HScroll != null){

this.HScroll(this, e);

}

if (e.Type == ScrollEventType.EndScroll){

this._oldValue = e.NewValue;

}

protected override void OnMouseMove(MouseEventArgs e){

base.OnMouseMove(e);

if (this._StyleProvider.ShowTabCloser){

Rectangle tabRect = this._StyleProvider.GetTabRect(this.ActiveIndex);

if (tabRect.Contains(this.MousePosition)){

this.Invalidate();

}

// Initialise Drag Drop

if (this.AllowDrop && e.Button == MouseButtons.Left){

this.StartDragDrop();

}

#endregion

#region Basic drawing methods

// private void CustomPaint(ref Message m){

// NativeMethods.PAINTSTRUCT paintStruct = new NativeMethods.PAINTSTRUCT();

// NativeMethods.BeginPaint(m.HWnd, ref paintStruct);

// using (Graphics screenGraphics = this.CreateGraphics()) {

// this.CustomPaint(screenGraphics);

// }

// NativeMethods.EndPaint(m.HWnd, ref paintStruct);

// }

/*protected override void OnPaint(PaintEventArgs e){

// We must always paint the entire area of the tab control

if (e.ClipRectangle.Equals(this.ClientRectangle)){

this.CustomPaint(e.Graphics);

} else {

// it is less intensive to just reinvoke the paint with the whole surface available to draw on.

this.Invalidate();

}

}*/

// HACK: Modded

private bool _painting = false;

protected override void OnPaint(PaintEventArgs e)

{

// We must always paint the entire area of the tab control

if (e.ClipRectangle.Equals(this.ClientRectangle) || _painting)

{

_painting = false;

this.CustomPaint(e.Graphics);

}

else

{

// it is less intensive to just reinvoke the paint with the whole surface available to draw on.

_painting = true;

this.Invalidate();

}

private void CustomPaint(Graphics screenGraphics){

// We render into a bitmap that is then drawn in one shot rather than using

// double buffering built into the control as the built in buffering

// messes up the background painting.

// Equally the .Net 2.0 BufferedGraphics object causes the background painting

// to mess up, which is why we use this .Net 1.1 buffering technique.

// Buffer code from Gil. Schmidt http://www.codeproject.com/KB/graphics/DoubleBuffering.aspx

if (this.Width > 0 && this.Height > 0){

if (this._BackImage == null){

// Cached Background Image

this._BackImage = new Bitmap(this.Width, this.Height);

Graphics backGraphics = Graphics.FromImage(this._BackImage);

backGraphics.Clear(Color.Transparent);

this.PaintTransparentBackground(backGraphics, this.ClientRectangle);

}

this._BackBufferGraphics.Clear(Color.Transparent);

this._BackBufferGraphics.DrawImageUnscaled(this._BackImage, 0, 0);

this._TabBufferGraphics.Clear(Color.Transparent);

if (this.TabCount > 0) {

// When top or bottom and scrollable we need to clip the sides from painting the tabs.

// Left and right are always multiline.

if (this.Alignment <= TabAlignment.Bottom && !this.Multiline){

this._TabBufferGraphics.Clip = new Region(new RectangleF(this.ClientRectangle.X + 3, this.ClientRectangle.Y, this.ClientRectangle.Width - 6, this.ClientRectangle.Height));

}

// Draw each tabpage from right to left. We do it this way to handle

// the overlap correctly.

if (this.Multiline) {

for (int row = 0; row < this.RowCount; row++) {

for (int index = this.TabCount - 1; index >= 0; index--) {

if (index != this.SelectedIndex && (this.RowCount == 1 || this.GetTabRow(index) == row)) {

this.DrawTabPage(index, this._TabBufferGraphics);

}

} else {

for (int index = this.TabCount - 1; index >= 0; index--) {

if (index != this.SelectedIndex) {

this.DrawTabPage(index, this._TabBufferGraphics);

}

// The selected tab must be drawn last so it appears on top.

if (this.SelectedIndex > -1) {

this.DrawTabPage(this.SelectedIndex, this._TabBufferGraphics);

}

this._TabBufferGraphics.Flush();

// Paint the tabs on top of the background

// Create a new color matrix and set the alpha value to 0.5

ColorMatrix alphaMatrix = new ColorMatrix();

alphaMatrix.Matrix00 = alphaMatrix.Matrix11 = alphaMatrix.Matrix22 = alphaMatrix.Matrix44 = 1;

alphaMatrix.Matrix33 = this._StyleProvider.Opacity;

// Create a new image attribute object and set the color matrix to

// the one just created

using (ImageAttributes alphaAttributes = new ImageAttributes()){

alphaAttributes.SetColorMatrix(alphaMatrix);

// Draw the original image with the image attributes specified

this._BackBufferGraphics.DrawImage(this._TabBuffer,

new Rectangle(0,0,this._TabBuffer.Width, this._TabBuffer.Height),

0,0,this._TabBuffer.Width, this._TabBuffer.Height, GraphicsUnit.Pixel,

alphaAttributes);

}

this._BackBufferGraphics.Flush();

// Now paint this to the screen

// We want to paint the whole tabstrip and border every time

// so that the hot areas update correctly, along with any overlaps

// paint the tabs etc.

if (this.RightToLeftLayout){

screenGraphics.DrawImageUnscaled(this._BackBuffer, -1, 0);

} else {

screenGraphics.DrawImageUnscaled(this._BackBuffer, 0, 0);

}

protected void PaintTransparentBackground(Graphics graphics, Rectangle clipRect)

{

if ((this.Parent != null)) {

// Set the cliprect to be relative to the parent

clipRect.Offset(this.Location);

// Save the current state before we do anything.

GraphicsState state = graphics.Save();

// Set the graphicsobject to be relative to the parent

graphics.TranslateTransform((float)-this.Location.X, (float)-this.Location.Y);

graphics.SmoothingMode = SmoothingMode.HighSpeed;

// Paint the parent

PaintEventArgs e = new PaintEventArgs(graphics, clipRect);

try {

this.InvokePaintBackground(this.Parent, e);

this.InvokePaint(this.Parent, e);

} finally {

// Restore the graphics state and the clipRect to their original locations

graphics.Restore(state);

clipRect.Offset(-this.Location.X, -this.Location.Y);

}

private void DrawTabPage(int index, Graphics graphics)

{

graphics.SmoothingMode = SmoothingMode.HighSpeed;

// Get TabPageBorder

using (GraphicsPath tabPageBorderPath = this.GetTabPageBorder(index)) {

// Paint the background

using (Brush fillBrush = this._StyleProvider.GetPageBackgroundBrush(index)){

graphics.FillPath(fillBrush, tabPageBorderPath);

}

if (this._Style != TabStyle.None){

// Paint the tab

this._StyleProvider.PaintTab(index, graphics);

// Draw any image

this.DrawTabImage(index, graphics);

// Draw the text

this.DrawTabText(index, graphics);

}

// Paint the border

this.DrawTabBorder(tabPageBorderPath, index, graphics);

}

private void DrawTabBorder(GraphicsPath path, int index, Graphics graphics)

{

graphics.SmoothingMode = SmoothingMode.HighQuality;

Color borderColor;

if (index == this.SelectedIndex) {

borderColor = this._StyleProvider.BorderColorSelected;

} else if (this._StyleProvider.HotTrack && index == this.ActiveIndex) {

borderColor = this._StyleProvider.BorderColorHot;

} else {

borderColor = this._StyleProvider.BorderColor;

}

using (Pen borderPen =new Pen(borderColor)){

graphics.DrawPath(borderPen, path);

}

private void DrawTabText(int index, Graphics graphics)

{

graphics.SmoothingMode = SmoothingMode.HighQuality;

graphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;

Rectangle tabBounds = this.GetTabTextRect(index);

if (this.SelectedIndex == index) {

using (Brush textBrush = new SolidBrush(this._StyleProvider.TextColorSelected)){

graphics.DrawString(this.TabPages[index].Text, this.Font, textBrush, tabBounds, this.GetStringFormat());

}

} else {

if (this.TabPages[index].Enabled) {

using (Brush textBrush = new SolidBrush(this._StyleProvider.TextColor)){

graphics.DrawString(this.TabPages[index].Text, this.Font, textBrush, tabBounds, this.GetStringFormat());

}

} else {

using (Brush textBrush = new SolidBrush(this._StyleProvider.TextColorDisabled)){

graphics.DrawString(this.TabPages[index].Text, this.Font, textBrush, tabBounds, this.GetStringFormat());

}

private void DrawTabImage(int index, Graphics graphics){

Image tabImage = null;

if (this.TabPages[index].ImageIndex > -1 && this.ImageList != null && this.ImageList.Images.Count > this.TabPages[index].ImageIndex){

tabImage = this.ImageList.Images[this.TabPages[index].ImageIndex];

} else if ((!string.IsNullOrEmpty(this.TabPages[index].ImageKey) && !this.TabPages[index].ImageKey.Equals("(none)", StringComparison.OrdinalIgnoreCase))

&& this.ImageList != null && this.ImageList.Images.ContainsKey(this.TabPages[index].ImageKey)) {

tabImage = this.ImageList.Images[this.TabPages[index].ImageKey];

}

if (tabImage != null) {

if (this.RightToLeftLayout){

tabImage.RotateFlip(RotateFlipType.RotateNoneFlipX);

}

Rectangle imageRect = this.GetTabImageRect(index);

if (this.TabPages[index].Enabled){

graphics.DrawImage(tabImage, imageRect);

} else {

ControlPaint.DrawImageDisabled(graphics, tabImage, imageRect.X, imageRect.Y, Color.Transparent);

}

#endregion

#region String formatting

private StringFormat GetStringFormat()

{

StringFormat format = null;

// Rotate Text by 90 degrees for left and right tabs

switch (this.Alignment) {

case TabAlignment.Top:

case TabAlignment.Bottom:

format = new StringFormat();

break;

case TabAlignment.Left:

case TabAlignment.Right:

format = new StringFormat(StringFormatFlags.DirectionVertical);

break;

}

format.Alignment = StringAlignment.Center;

format.LineAlignment = StringAlignment.Center;

if (this.FindForm() != null && this.FindForm().KeyPreview){

format.HotkeyPrefix = System.Drawing.Text.HotkeyPrefix.Show;

} else {

format.HotkeyPrefix = System.Drawing.Text.HotkeyPrefix.Hide;

}

if (this.RightToLeft == RightToLeft.Yes){

format.FormatFlags = format.FormatFlags | StringFormatFlags.DirectionRightToLeft;

}

return format;

}

#endregion

#region Tab borders and bounds properties

private GraphicsPath GetTabPageBorder(int index){

GraphicsPath path = new GraphicsPath();

Rectangle pageBounds = this.GetPageBounds(index);

Rectangle tabBounds = this._StyleProvider.GetTabRect(index);

this._StyleProvider.AddTabBorder(path, tabBounds);

this.AddPageBorder(path, pageBounds, tabBounds);

path.CloseFigure();

return path;

}

public Rectangle GetPageBounds(int index){

Rectangle pageBounds = this.TabPages[index].Bounds;

pageBounds.Width += 1;

pageBounds.Height += 1;

pageBounds.X -= 1;

pageBounds.Y -= 1;

if (pageBounds.Bottom > this.Height - 4){

pageBounds.Height -= (pageBounds.Bottom - this.Height + 4);

}

return pageBounds;

}

private Rectangle GetTabTextRect(int index){

Rectangle textRect = new Rectangle();

using (GraphicsPath path = this._StyleProvider.GetTabBorder(index)){

RectangleF tabBounds = path.GetBounds();

textRect = new Rectangle((int)tabBounds.X, (int)tabBounds.Y, (int)tabBounds.Width, (int)tabBounds.Height);

// Make it shorter or thinner to fit the height or width because of the padding added to the tab for painting

switch (this.Alignment) {

case TabAlignment.Top:

textRect.Y += 4;

textRect.Height -= 6;

break;

case TabAlignment.Bottom:

textRect.Y += 2;

View remainder of file in raw view

flashdevelop/PluginCore/TabControl/CustomTabControl.cs at patch-1 · SandersAlex/flashdevelop · GitHub

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