265 lines
10 KiB
C#
265 lines
10 KiB
C#
//
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// ToolStripSplitStackLayout.cs
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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// Copyright (c) 2006 Jonathan Pobst
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//
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// Authors:
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// Jonathan Pobst (monkey@jpobst.com)
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//
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using System;
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using System.Drawing;
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using System.Windows.Forms.Layout;
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namespace System.Windows.Forms
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{
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class ToolStripSplitStackLayout : LayoutEngine
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{
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public override bool Layout (object container, LayoutEventArgs args)
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{
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if (container is ToolStrip)
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{
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ToolStrip ts = (ToolStrip)container;
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if (ts.Items == null)
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return false;
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Rectangle ts_rect = ts.DisplayRectangle;
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// Mono hasn't yet implemented ToolStripLayoutStyle.Table, so it comes here
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// for layout. The default (minimal) Table layout is 1 column, any number of rows,
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// which translates effectively to Vertical orientation.
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if (ts.Orientation == Orientation.Horizontal && ts.LayoutStyle != ToolStripLayoutStyle.Table)
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LayoutHorizontalToolStrip (ts, ts_rect);
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else
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LayoutVerticalToolStrip (ts, ts_rect);
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return false;
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} else {
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ToolStripContentPanel ts = (ToolStripContentPanel)container;
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int x = ts.DisplayRectangle.Left;
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int y = ts.DisplayRectangle.Top;
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foreach (ToolStrip tsi in ts.Controls) {
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Rectangle new_bounds = new Rectangle ();
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x += tsi.Margin.Left;
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new_bounds.Location = new Point (x, y + tsi.Margin.Top);
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new_bounds.Height = ts.DisplayRectangle.Height - tsi.Margin.Vertical;
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new_bounds.Width = tsi.GetToolStripPreferredSize (new Size (0, new_bounds.Height)).Width;
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tsi.Width = new_bounds.Width + 12;
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x += new_bounds.Width + tsi.Margin.Right;
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}
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}
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return false;
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}
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private void LayoutHorizontalToolStrip (ToolStrip ts, Rectangle bounds)
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{
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//if (!ts.Visible) return;
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ToolStripItemOverflow[] overflow = new ToolStripItemOverflow[ts.Items.Count];
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ToolStripItemPlacement[] placement = new ToolStripItemPlacement[ts.Items.Count];
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Size proposedSize = new Size (0, bounds.Height);
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int[] widths = new int[ts.Items.Count];
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int total_width = 0;
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int toolstrip_width = bounds.Width;
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int i = 0;
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bool can_overflow = ts.CanOverflow & !(ts is MenuStrip) & !(ts is StatusStrip);
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bool need_overflow = false;
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foreach (ToolStripItem tsi in ts.Items) {
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overflow[i] = tsi.Overflow;
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placement[i] = tsi.Overflow == ToolStripItemOverflow.Always ? ToolStripItemPlacement.Overflow : ToolStripItemPlacement.Main;
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widths[i] = tsi.GetPreferredSize (proposedSize).Width + tsi.Margin.Horizontal;
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if (!tsi.Available)
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placement[i] = ToolStripItemPlacement.None;
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total_width += placement[i] == ToolStripItemPlacement.Main ? widths[i] : 0;
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if (placement[i] == ToolStripItemPlacement.Overflow)
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need_overflow = true;
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i++;
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}
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// This is needed for a button set to Overflow = Always
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if (need_overflow) {
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ts.OverflowButton.Visible = true;
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ts.OverflowButton.SetBounds (new Rectangle (ts.Width - 16, 0, 16, ts.Height));
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toolstrip_width -= ts.OverflowButton.Width;
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} else
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ts.OverflowButton.Visible = false;
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while (total_width > toolstrip_width) {
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// If we can overflow, get our overflow button setup, and subtract it's width
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// from our available width
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if (can_overflow && !ts.OverflowButton.Visible) {
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ts.OverflowButton.Visible = true;
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ts.OverflowButton.SetBounds (new Rectangle (ts.Width - 16, 0, 16, ts.Height));
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toolstrip_width -= ts.OverflowButton.Width;
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}
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bool removed_one = false;
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// Start at the right, removing Overflow.AsNeeded first
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for (int j = widths.Length - 1; j >= 0; j--)
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if (overflow[j] == ToolStripItemOverflow.AsNeeded && placement[j] == ToolStripItemPlacement.Main) {
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placement[j] = ToolStripItemPlacement.Overflow;
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total_width -= widths[j];
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removed_one = true;
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break;
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}
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// If we didn't remove any AsNeeded ones, we have to start removing Never ones
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// These are not put on the Overflow, they are simply not shown
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if (!removed_one)
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for (int j = widths.Length - 1; j >= 0; j--)
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if (overflow[j] == ToolStripItemOverflow.Never && placement[j] == ToolStripItemPlacement.Main) {
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placement[j] = ToolStripItemPlacement.None;
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total_width -= widths[j];
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removed_one = true;
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break;
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}
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// There's nothing left to remove, break or we will loop forever
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if (!removed_one)
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break;
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}
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i = 0;
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Point start_layout_pointer = new Point (ts.DisplayRectangle.Left, ts.DisplayRectangle.Top);
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Point end_layout_pointer = new Point (ts.DisplayRectangle.Right, ts.DisplayRectangle.Top);
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int button_height = ts.DisplayRectangle.Height;
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// Now we should know where everything goes, so lay everything out
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foreach (ToolStripItem tsi in ts.Items) {
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tsi.SetPlacement (placement[i]);
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if (placement[i] == ToolStripItemPlacement.Main) {
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if (tsi.Alignment == ToolStripItemAlignment.Left) {
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tsi.SetBounds (new Rectangle (start_layout_pointer.X + tsi.Margin.Left, start_layout_pointer.Y + tsi.Margin.Top, widths[i] - tsi.Margin.Horizontal, button_height - tsi.Margin.Vertical));
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start_layout_pointer.X += widths[i];
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} else {
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tsi.SetBounds (new Rectangle (end_layout_pointer.X - tsi.Margin.Right - tsi.Width, end_layout_pointer.Y + tsi.Margin.Top, widths[i] - tsi.Margin.Horizontal, button_height - tsi.Margin.Vertical));
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end_layout_pointer.X -= widths[i];
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}
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}
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i++;
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}
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}
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private void LayoutVerticalToolStrip (ToolStrip ts, Rectangle bounds)
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{
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if (!ts.Visible) return;
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ToolStripItemOverflow[] overflow = new ToolStripItemOverflow[ts.Items.Count];
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ToolStripItemPlacement[] placement = new ToolStripItemPlacement[ts.Items.Count];
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Size proposedSize = new Size (bounds.Width, 0);
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int[] heights = new int[ts.Items.Count];
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int[] widths = new int[ts.Items.Count]; // needed if ts.LayoutStyle == ToolStripLayoutStyle.Table
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int total_height = 0;
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int toolstrip_height = bounds.Height;
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int i = 0;
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bool can_overflow = ts.CanOverflow & !(ts is MenuStrip) & !(ts is StatusStrip);
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foreach (ToolStripItem tsi in ts.Items) {
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overflow[i] = tsi.Overflow;
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placement[i] = tsi.Overflow == ToolStripItemOverflow.Always ? ToolStripItemPlacement.Overflow : ToolStripItemPlacement.Main;
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var size = tsi.GetPreferredSize (proposedSize);
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heights[i] = size.Height + tsi.Margin.Vertical;
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widths[i] = size.Width + tsi.Margin.Horizontal;
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if (!tsi.Available)
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placement[i] = ToolStripItemPlacement.None;
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total_height += placement[i] == ToolStripItemPlacement.Main ? heights[i] : 0;
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i++;
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}
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ts.OverflowButton.Visible = false;
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while (total_height > toolstrip_height) {
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// If we can overflow, get our overflow button setup, and subtract it's width
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// from our available width
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if (can_overflow && !ts.OverflowButton.Visible) {
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ts.OverflowButton.Visible = true;
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ts.OverflowButton.SetBounds (new Rectangle (0, ts.Height - 16, ts.Width, 16));
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toolstrip_height -= ts.OverflowButton.Height;
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}
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bool removed_one = false;
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// Start at the right, removing Overflow.AsNeeded first
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for (int j = heights.Length - 1; j >= 0; j--)
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if (overflow[j] == ToolStripItemOverflow.AsNeeded && placement[j] == ToolStripItemPlacement.Main) {
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placement[j] = ToolStripItemPlacement.Overflow;
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total_height -= heights[j];
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removed_one = true;
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break;
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}
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// If we didn't remove any AsNeeded ones, we have to start removing Never ones
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// These are not put on the Overflow, they are simply not shown
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if (!removed_one)
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for (int j = heights.Length - 1; j >= 0; j--)
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if (overflow[j] == ToolStripItemOverflow.Never && placement[j] == ToolStripItemPlacement.Main) {
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placement[j] = ToolStripItemPlacement.None;
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total_height -= heights[j];
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removed_one = true;
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break;
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}
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// There's nothing left to remove, break or we will loop forever
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if (!removed_one)
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break;
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}
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i = 0;
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Point start_layout_pointer = new Point (ts.DisplayRectangle.Left, ts.DisplayRectangle.Top);
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Point end_layout_pointer = new Point (ts.DisplayRectangle.Left, ts.DisplayRectangle.Bottom);
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int button_width = ts.DisplayRectangle.Width;
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// Now we should know where everything goes, so lay everything out
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foreach (ToolStripItem tsi in ts.Items) {
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tsi.SetPlacement (placement[i]);
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// Table layout is defined to lay out items flush left.
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if (ts.LayoutStyle == ToolStripLayoutStyle.Table)
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button_width = widths[i];
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if (placement[i] == ToolStripItemPlacement.Main) {
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if (tsi.Alignment == ToolStripItemAlignment.Left) {
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tsi.SetBounds (new Rectangle (start_layout_pointer.X + tsi.Margin.Left, start_layout_pointer.Y + tsi.Margin.Top, button_width - tsi.Margin.Horizontal, heights[i] - tsi.Margin.Vertical));
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start_layout_pointer.Y += heights[i];
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} else {
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tsi.SetBounds (new Rectangle (end_layout_pointer.X + tsi.Margin.Left, end_layout_pointer.Y - tsi.Margin.Bottom - tsi.Height, button_width - tsi.Margin.Horizontal, heights[i] - tsi.Margin.Vertical));
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start_layout_pointer.Y += heights[i];
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}
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}
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i++;
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}
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}
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}
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}
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