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Restructuring the project, first steps.

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Robin Krom 2021-03-27 22:30:25 +01:00
parent 2fdb667d70
commit 11f586ab36
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src/GreenshotPlugin/Controls/ThumbnailForm.cs Normal file
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/*
* Greenshot - a free and open source screenshot tool
* Copyright (C) 2007-2021 Thomas Braun, Jens Klingen, Robin Krom
*
* For more information see: http://getgreenshot.org/
* The Greenshot project is hosted on GitHub https://github.com/greenshot/greenshot
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
using System;
using System.Windows.Forms;
using GreenshotPlugin.Core;
using System.Drawing;
using GreenshotPlugin.Core.Enums;
using GreenshotPlugin.IniFile;
using GreenshotPlugin.UnmanagedHelpers;
using GreenshotPlugin.UnmanagedHelpers.Enums;
using GreenshotPlugin.UnmanagedHelpers.Structs;
namespace GreenshotPlugin.Controls {
/// <summary>
/// This form allows us to show a Thumbnail preview of a window near the context menu when selecting a window to capture.
/// Didn't make it completely "generic" yet, but at least most logic is in here so we don't have it in the mainform.
/// </summary>
public sealed class ThumbnailForm : FormWithoutActivation {
private static readonly CoreConfiguration conf = IniConfig.GetIniSection<CoreConfiguration>();
private IntPtr _thumbnailHandle = IntPtr.Zero;
public ThumbnailForm() {
ShowInTaskbar = false;
FormBorderStyle = FormBorderStyle.None;
TopMost = false;
Enabled = false;
if (conf.WindowCaptureMode == WindowCaptureMode.Auto || conf.WindowCaptureMode == WindowCaptureMode.Aero) {
BackColor = Color.FromArgb(255, conf.DWMBackgroundColor.R, conf.DWMBackgroundColor.G, conf.DWMBackgroundColor.B);
} else {
BackColor = Color.White;
}
// cleanup at close
FormClosing += delegate {
UnregisterThumbnail();
};
}
public new void Hide() {
UnregisterThumbnail();
base.Hide();
}
private void UnregisterThumbnail()
{
if (_thumbnailHandle == IntPtr.Zero) return;
DWM.DwmUnregisterThumbnail(_thumbnailHandle);
_thumbnailHandle = IntPtr.Zero;
}
/// <summary>
/// Show the thumbnail of the supplied window above (or under) the parent Control
/// </summary>
/// <param name="window">WindowDetails</param>
/// <param name="parentControl">Control</param>
public void ShowThumbnail(WindowDetails window, Control parentControl) {
UnregisterThumbnail();
DWM.DwmRegisterThumbnail(Handle, window.Handle, out _thumbnailHandle);
if (_thumbnailHandle == IntPtr.Zero) return;
var result = DWM.DwmQueryThumbnailSourceSize(_thumbnailHandle, out var sourceSize);
if (result.Failed())
{
DWM.DwmUnregisterThumbnail(_thumbnailHandle);
return;
}
if (sourceSize.IsEmpty)
{
DWM.DwmUnregisterThumbnail(_thumbnailHandle);
return;
}
int thumbnailHeight = 200;
int thumbnailWidth = (int)(thumbnailHeight * (sourceSize.Width / (float)sourceSize.Height));
if (parentControl != null && thumbnailWidth > parentControl.Width)
{
thumbnailWidth = parentControl.Width;
thumbnailHeight = (int)(thumbnailWidth * (sourceSize.Height / (float)sourceSize.Width));
}
Width = thumbnailWidth;
Height = thumbnailHeight;
// Prepare the displaying of the Thumbnail
var dwmThumbnailProperties = new DWM_THUMBNAIL_PROPERTIES
{
Opacity = 255,
Visible = true,
SourceClientAreaOnly = false,
Destination = new RECT(0, 0, thumbnailWidth, thumbnailHeight)
};
result = DWM.DwmUpdateThumbnailProperties(_thumbnailHandle, ref dwmThumbnailProperties);
if (result.Failed())
{
DWM.DwmUnregisterThumbnail(_thumbnailHandle);
return;
}
if (parentControl != null) {
AlignToControl(parentControl);
}
if (!Visible) {
Show();
}
// Make sure it's on "top"!
if (parentControl != null) {
User32.SetWindowPos(Handle, parentControl.Handle, 0, 0, 0, 0, WindowPos.SWP_NOMOVE | WindowPos.SWP_NOSIZE | WindowPos.SWP_NOACTIVATE);
}
}
public void AlignToControl(Control alignTo) {
var screenBounds = WindowCapture.GetScreenBounds();
if (screenBounds.Contains(alignTo.Left, alignTo.Top - Height)) {
Location = new Point(alignTo.Left + (alignTo.Width / 2) - (Width / 2), alignTo.Top - Height);
} else {
Location = new Point(alignTo.Left + (alignTo.Width / 2) - (Width / 2), alignTo.Bottom);
}
}
}
}