Does anyone know how to create layout component in blackberry that behave like android's sliding drawer?
thx.
Haven't actually done it. But I think the biggest difficulty here is the Sliding animation part and the visibility IMHO. You should first work on the animation for the sliding effect. Then on the Manager itself.
Touch devices come with another difficulty... you have to program the slider touch event so that it follows the gesture.
hey its really a brilliant idea to have such layouts for blackberry. it is quite challenging to get it done. we have to play with custom layouts.
first thing requied is the knowledge of customization of managers. I believe we can also use pop up screen to slide it up. manager on top of an pop up screen.
secondly, the Gusture api for side scrolling.
all the best buddy.
Please check the below source code in which i created a manager class. Just add whatever you want to slide to that manager and use it. Change according to your requirement.
package mypackage;
import net.rim.device.api.ui.Graphics;
import net.rim.device.api.ui.Manager;
import net.rim.device.api.ui.TouchEvent;
import net.rim.device.api.ui.component.Dialog;
import net.rim.device.api.ui.component.LabelField;
public class SlidingDrawer extends Manager {
final static int STATE_VIEW = 1;
final static int STATE_HIDE = STATE_VIEW+1;
final static int STATE_SLIDE_DOWN = STATE_HIDE+1;
final static int STATE_SLIDE_UP = STATE_SLIDE_DOWN+1;
final static int MAX_NO_OF_STATES = STATE_SLIDE_UP+1;
static int CURRENT_STATE = STATE_VIEW;
int i = 0;
LabelField _lbl_hero;
public SlidingDrawer(long arg0) {
super(arg0);
// TODO Auto-generated constructor stub
init();
}
private void init()
{
_lbl_hero = new LabelField("Hero testing Every thign....");
this.add(_lbl_hero);
}
protected void paint(Graphics graphics) {
// TODO Auto-generated method stub
switch(CURRENT_STATE)
{
case STATE_VIEW:
super.paint(graphics);
break;
case STATE_HIDE:
break;
case STATE_SLIDE_DOWN:
super.paint(graphics);
if(i<this.getHeight())
{
this.getField(0).setPadding(i++, 0, 0, 0);
invalidate();
}
else
{
CURRENT_STATE = STATE_HIDE;
}
break;
case STATE_SLIDE_UP:
super.paint(graphics);
if( i > 0 )
{
this.getField(0).setPadding(i--, 0, 0, 0);
invalidate();
}
else
{
CURRENT_STATE = STATE_VIEW;
}
break;
}
}
public void setState(int state)
{
if(state < MAX_NO_OF_STATES)
{
CURRENT_STATE = state;
}
else
Dialog.alert("Invalid State....");
}
protected boolean touchEvent(TouchEvent message) {
// TODO Auto-generated method stub
if(CURRENT_STATE == STATE_VIEW)
{
i=0;
CURRENT_STATE = STATE_SLIDE_DOWN;
invalidate();
}
else if(CURRENT_STATE == STATE_HIDE)
{
// i = this.getField(0).getContentRect().y;
CURRENT_STATE = STATE_SLIDE_UP;
invalidate();
}
return super.touchEvent(message);
}
protected void sublayout(int maxWidth, int maxHeight) {
// TODO Auto-generated method stub
setExtent(360, 100);//Width and Height of the Childs
}
}
Please change this code according to your requirement and use it.
Related
I've created an MFC Application, with a Base Dialog (derived from CDialog class), a Setting Dialog (derived from CBaseDlg and an App Dialog (also derived from CBaseDlg). Then I created a class called CScrMng (aka Screen Manager) that hold the ShowDialog() function (to Create and Show these dialogs).
The basic idea is ScrMng will manage all of my Modeless Dialogs, and anytime I want to open a dialog, I just need to CScrMng::ShowDialog() in the BaseDlg.cpp, and the dialog will display.
This approach has caused resources to leak here and there. I've done a bit of research about overriding the PostNcDestroy(), but I don't have a clear idea of where to call it.
What function should I use to properly close these modeless dialogs?
I want to open the Setting Dialog from Base Dialog, then when I click on the Cancel button, it should return me to the Base Dialog screen so that I can open another Dialog.
Right now I'm using EndDialog(). I know it's wrong, but calling DestroyWindow() will immediately exit the program, which is not what I want.
Source code
MFCApplication.cpp
#include...
BEGIN_MESSAGE_MAP(CMFCApp, CWinApp)
ON_COMMAND(ID_HELP, &CWinApp::OnHelp)
END_MESSAGE_MAP()
CMFCApp::CMFCApp()
{
// support Restart Manager
m_dwRestartManagerSupportFlags = AFX_RESTART_MANAGER_SUPPORT_RESTART;
}
CMFCApp theApp;
BOOL CMFCApp::InitInstance()
{
...
CWinApp::InitInstance();
CShellManager *pShellManager = new CShellManager;
CScrMng::GetInstance()->ShowDialog(IDD_MAINDLG);
SetRegistryKey(_T("Local Applications"));
if (pShellManager != NULL)
{
delete pShellManager;
}
return TRUE;
}
CScrMng.cpp
#include...
CScrMng* CScrMng::m_pInstance = NULL;
CScrMng* CScrMng::GetInstance(){
if (m_pInstance == NULL)
m_pInstance = new CScrMng();
return m_pInstance;
}
CScrMng::CScrMng(){}
void CScrMng::ShowDialog(int ID)
{
CMainDlg* m_pDlg = NULL;
switch (ID)
{
case IDD_MAINDLG:
m_pDlg = new CMainDlg();
theApp.m_pMainWnd = m_pDlg;
m_pDlg->Create(IDD_MAINDLG);
m_pDlg->ShowWindow(SW_SHOW);
m_pDlg->UpdateWindow();
break;
case ...
break;
case IDD_SETTINGDLG:
m_pDlg = new CSettingDlg();
m_pDlg->Create(ID,NULL);
m_pDlg->ShowWindow(SW_SHOW);
m_pDlg->UpdateWindow();
break;
}
CMainDlg.cpp
#include...
CMainDlg::CMainDlg(CWnd* pParent /*=NULL*/)
: CDialog(CMainDlg::IDD, pParent) {m_hIcon = AfxGetApp()-> LoadIcon(IDR_MAINFRAME);}
void CMainDlg::DoDataExchange(CDataExchange* pDX) {...}
void CMainDlg::PostNcDestroy() //Added these
{
CDialog::PostNcDestroy();
delete this;
}
BEGIN_MESSAGE_MAP(CMainDlg, CDialog)
...
END_MESSAGE_MAP()
BOOL CMainDlg::OnInitDialog() {
CDialog::OnInitDialog();
SetIcon(m_hIcon, FALSE);
return TRUE;
}
void CMainDlg::OnPaint() {...}
void CMainDlg::OnBnClickedOpenAppdlg()
{
CScrMng::GetInstance()->ShowDialog(IDD_APPDLG);
}
void CMainDlg::OnBnClickedOpenSettingdlg()
{
CScrMng::GetInstance()->ShowDialog(IDD_SETTINGDLG);
}
void CMainDlg::OnBnClickedExit()
{
DestroyWindow(); //replaced CDialog::OnCancel() with this.
}
Update: After changing the code in the SettingDlg.cpp, i encountered a Debug Assertion Failed! problem :
void CWnd::MoveWindow(int x, int y, int nWidth, int nHeight, BOOL bRepaint)
{
ASSERT(::IsWindow(m_hWnd) || (m_pCtrlSite != NULL)); //Breakpoint triggered
if (m_pCtrlSite == NULL)
::MoveWindow(m_hWnd, x, y, nWidth, nHeight, bRepaint);
else
m_pCtrlSite->MoveWindow(x, y, nWidth, nHeight);
}
Here are what i changed in the .cpp file:
SettingDlg.cpp
void CSettingDlg::PostNcDestroy()
{
CMainDlg::PostNcDestroy();
}
void CSettingDlg::OnBnClickedSettingcancel()
{
DestroyWindow(); //Using destroyWindow rather than EndDialog();
}
Close & Delete a modeless Dialogs.
A proper Way is: Override PostNcDestroy, OnOk() and OnCancel() for the Modeless Dialogs
void CBaseDlg::PostNcDestroy()
{
CDialog::PostNcDestroy();
delete this;
}
.
void CBaseDlg::OnOk()
{
if(!UpdateData(TRUE))
return;
DestroyWindow();
}
.
void CBaseDlg::OnCancel()
{
DestroyWindow();
}
I'm working on this game breakout-game
And i'm trying to make the ball fire and collide with the wall bouncing, to do that I did what he said, I added a script and put this code:
public class BallMove : MonoBehaviour {
private Rigidbody rb;
public float ballVelocity = 800f;
private bool isMove;
// Use this for initialization
void awake() {
rb = GetComponent<Rigidbody> ();
}
// Update is called once per frame
void Update () {
if (Input.GetButtonDown ("Fire1") && isMove == false) {
transform.parent = null;
isMove = true;
rb.isKinematic = false;
rb.AddForce (new Vector3(ballVelocity,ballVelocity,0));
}
}
}
I understand every line of this code, but when I try to play this, I got a nullReferenceException ,I can run the game but when I press the key I'm getting a error,someone know why? and what happens?
You should use Awake(), not awake(). In your case, you are using a "customized" function, and not the "official" one used by the Unity engine.
So, the engine cannot start that function by itself, and rb stills null when used in the Update().
Example:
void Awake() {
rb = GetComponent<Rigidbody> ();
}
I was making a program and I stumbled across this two-in-one problem, where the first problem leads to the other. I have not yet found a question where someone had both problems leading into eachother. I'm still learing, and have learned a lot from other problems I had, but I can't find a solution to this problem.
It has to do with threading. I want to make a thread, that can place something in a rich textbox every second or so, while I can still press buttons to start and stop it. But to make a function that a thread can run, I need to make the function static. Otherwise I'll get the error "A field initializer cannot reference the non-static field, method, or property". But when a function is static, it cannot acces any of the created items, like richTextBox1. Because if I try to change it's text, I get the error "Error 1 An object reference is required for the non-static field, method, or property". And if I fix this by removing static, the thread will not work.
I made a demo program that is smaller than the full one, but has the same problem. Button1 is the button to start the thread, Button2 is the one to stop it.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Threading;
namespace threading_non_static_problem_demo
{
public partial class Form1 : Form
{
static Thread thr = new Thread(new ThreadStart(demofunc));
int checkthr = 0; //int to check if the thread has been running before (I like to do things like this)
int ifthrrun = 0; //int to check if the thread is running
public Form1()
{
InitializeComponent();
button2.Enabled = false; // so you can't click the "stop" button if nothing is running
}
private void richTextBox1_TextChanged(object sender, EventArgs e)
{
}
static void demofunc()
{
while (true)
{
Thread.Sleep(1000);
richTextBox1.Text = richTextBox1.Text + "text added"; // <-- here's the problem
MessageBox.Show("tried to add text"); // you can use this messagebox to check if the thread is working correctly
}
}
private void button1_Click(object sender, EventArgs e)
{
if (checkthr == 0) // check if the thread has run before, 0 is no, 1 is yes, and then start or resume it
{
thr.Start();
ifthrrun = 1;
button2.Enabled = true;
button1.Enabled = false;
}
else if (checkthr == 1)
{
thr.Resume();
ifthrrun = 1;
button2.Enabled = true;
button1.Enabled = false;
}
}
private void button2_Click(object sender, EventArgs e)
{
thr.Suspend();
checkthr = 1;
ifthrrun = 0;
button2.Enabled = false;
button1.Enabled = true;
}
protected override void OnFormClosing(FormClosingEventArgs e) // if the program is closing, check the thread's state and act accordingly
{
if (ifthrrun == 0)
{
if (checkthr == 1)
{
thr.Resume();
thr.Abort();
}
else if (checkthr == 0)
{
}
}
else if (ifthrrun == 1)
{
thr.Abort();
}
}
}
}
To use this code just creat a forms application, add two buttons, and a rich text box, it should work.
Thank you in advance for you answers.
But to make a function that a thread can run, I need to make the
function static.
Get rid of the static declarations and move initialization of your "thr" variable to the constructor like this:
Thread thr;
public Form1()
{
InitializeComponent();
button2.Enabled = false; // so you can't click the "stop" button if nothing is running
thr = new Thread(new ThreadStart(demofunc));
Control.CheckForIllegalCrossThreadCalls = false;
}
private void demofunc()
{
while (true)
{
Thread.Sleep(1000);
richTextBox1.Text = richTextBox1.Text + "text added"; // <-- problem "solved" by disabling Control.CheckForIllegalCrossThreadCalls
}
}
But ignore the above "fix" because using Suspend()/Resume() is not recommended.
See Pausing and Resuming Threads:
Important
Starting with the .NET Framework version 2.0, the Thread.Suspend and
Thread.Resume methods are marked obsolete and will be removed in a
future release.
The Thread.Suspend and Thread.Resume methods are not
generally useful for applications and should not be confused with
synchronization mechanisms. Because Thread.Suspend and Thread.Resume
do not rely on the cooperation of the thread being controlled, they
are highly intrusive and can result in serious application problems
like deadlocks (for example, if you suspend a thread that holds a
resource that another thread will need).
One way to be able to pause/resume your loop would be to use a ManualResetEvent like this:
Thread thr;
ManualResetEvent mre = new ManualResetEvent(false);
public Form1()
{
InitializeComponent();
button2.Enabled = false; // so you can't click the "stop" button if nothing is running
thr = new Thread(new ThreadStart(demofunc));
}
private void demofunc()
{
while (!this.IsDisposed && !this.Disposing)
{
Thread.Sleep(1000);
if (!this.IsDisposed && !this.Disposing)
{
this.Invoke((MethodInvoker)delegate {
richTextBox1.AppendText("text added");
});
}
mre.WaitOne();
}
}
private void button1_Click(object sender, EventArgs e)
{
button1.Enabled = false;
mre.Set();
if (!thr.IsAlive)
{
thr.Start();
}
button2.Enabled = true;
}
private void button2_Click(object sender, EventArgs e)
{
button2.Enabled = false;
mre.Reset();
button1.Enabled = true;
}
protected override void OnFormClosing(FormClosingEventArgs e) // if the program is closing, check the thread's state and act accordingly
{
mre.Set(); // make sure the loop continues so it can drop out
}
}
I love that Windows 10 now has support for virtual desktops built in, but I have some features that I'd like to add/modify (e.g., force a window to appear on all desktops, launch the task view with a hotkey, have per-monitor desktops, etc.)
I have searched for applications and developer references to help me customize my desktops, but I have had no luck.
Where should I start? I am looking for Windows API functions (ideally, that are callable from a C# application) that will give me programmatic access to manipulate virtual desktops and the windows therein.
The Windows SDK Support Team Blog posted a C# demo to switch Desktops via IVirtualDesktopManager:
[ComImport, InterfaceType(ComInterfaceType.InterfaceIsIUnknown), Guid("a5cd92ff-29be-454c-8d04-d82879fb3f1b")]
[System.Security.SuppressUnmanagedCodeSecurity]
public interface IVirtualDesktopManager
{
[PreserveSig]
int IsWindowOnCurrentVirtualDesktop(
[In] IntPtr TopLevelWindow,
[Out] out int OnCurrentDesktop
);
[PreserveSig]
int GetWindowDesktopId(
[In] IntPtr TopLevelWindow,
[Out] out Guid CurrentDesktop
);
[PreserveSig]
int MoveWindowToDesktop(
[In] IntPtr TopLevelWindow,
[MarshalAs(UnmanagedType.LPStruct)]
[In]Guid CurrentDesktop
);
}
[ComImport, Guid("aa509086-5ca9-4c25-8f95-589d3c07b48a")]
public class CVirtualDesktopManager
{
}
public class VirtualDesktopManager
{
public VirtualDesktopManager()
{
cmanager = new CVirtualDesktopManager();
manager = (IVirtualDesktopManager)cmanager;
}
~VirtualDesktopManager()
{
manager = null;
cmanager = null;
}
private CVirtualDesktopManager cmanager = null;
private IVirtualDesktopManager manager;
public bool IsWindowOnCurrentVirtualDesktop(IntPtr TopLevelWindow)
{
int result;
int hr;
if ((hr = manager.IsWindowOnCurrentVirtualDesktop(TopLevelWindow, out result)) != 0)
{
Marshal.ThrowExceptionForHR(hr);
}
return result != 0;
}
public Guid GetWindowDesktopId(IntPtr TopLevelWindow)
{
Guid result;
int hr;
if ((hr = manager.GetWindowDesktopId(TopLevelWindow, out result)) != 0)
{
Marshal.ThrowExceptionForHR(hr);
}
return result;
}
public void MoveWindowToDesktop(IntPtr TopLevelWindow, Guid CurrentDesktop)
{
int hr;
if ((hr = manager.MoveWindowToDesktop(TopLevelWindow, CurrentDesktop)) != 0)
{
Marshal.ThrowExceptionForHR(hr);
}
}
}
it includes the API to detect on which desktop the Window is shown and it can switch and move a Windows the a Desktop.
Programmatic access to the virtual desktop feature is very limited, as Microsoft has only exposed the IVirtualDesktopManager COM interface. It does provide two key functions:
IVirtualDesktopManager::GetWindowDesktopId allows you to retrieve the ID of a virtual desktop, based on a window that is already assigned to that desktop.
IVirtualDesktopManager::MoveWindowToDesktop allows you to move a window to a specific virtual desktop.
Unfortunately, this is not nearly enough to accomplish anything useful. I've written some C# code based on the reverse-engineering work done by NickoTin. I can't read much of the Russian in his blog post, but his C++ code was pretty accurate.
I do need to emphasize that this code is not something you want to commit to in a product. Microsoft always feels free to change undocumented APIs whenever they feel like it. And there is a runtime risk as well: this code does not necessarily interact well when the user is tinkering with the virtual desktops. Always keep in mind that a virtual desktop can appear and disappear at any time, completely out of sync with your code.
To use the code, create a new C# class library project. I'll first post ComInterop.cs, it contains the COM interface declarations that match NickoTin's C++ declarations:
using System;
using System.Runtime.InteropServices;
namespace Windows10Interop {
internal static class Guids {
public static readonly Guid CLSID_ImmersiveShell =
new Guid(0xC2F03A33, 0x21F5, 0x47FA, 0xB4, 0xBB, 0x15, 0x63, 0x62, 0xA2, 0xF2, 0x39);
public static readonly Guid CLSID_VirtualDesktopManagerInternal =
new Guid(0xC5E0CDCA, 0x7B6E, 0x41B2, 0x9F, 0xC4, 0xD9, 0x39, 0x75, 0xCC, 0x46, 0x7B);
public static readonly Guid CLSID_VirtualDesktopManager =
new Guid("AA509086-5CA9-4C25-8F95-589D3C07B48A");
public static readonly Guid IID_IVirtualDesktopManagerInternal =
new Guid("AF8DA486-95BB-4460-B3B7-6E7A6B2962B5");
public static readonly Guid IID_IVirtualDesktop =
new Guid("FF72FFDD-BE7E-43FC-9C03-AD81681E88E4");
}
[ComImport]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
[Guid("FF72FFDD-BE7E-43FC-9C03-AD81681E88E4")]
internal interface IVirtualDesktop {
void notimpl1(); // void IsViewVisible(IApplicationView view, out int visible);
Guid GetId();
}
[ComImport]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
[Guid("AF8DA486-95BB-4460-B3B7-6E7A6B2962B5")]
internal interface IVirtualDesktopManagerInternal {
int GetCount();
void notimpl1(); // void MoveViewToDesktop(IApplicationView view, IVirtualDesktop desktop);
void notimpl2(); // void CanViewMoveDesktops(IApplicationView view, out int itcan);
IVirtualDesktop GetCurrentDesktop();
void GetDesktops(out IObjectArray desktops);
[PreserveSig]
int GetAdjacentDesktop(IVirtualDesktop from, int direction, out IVirtualDesktop desktop);
void SwitchDesktop(IVirtualDesktop desktop);
IVirtualDesktop CreateDesktop();
void RemoveDesktop(IVirtualDesktop desktop, IVirtualDesktop fallback);
IVirtualDesktop FindDesktop(ref Guid desktopid);
}
[ComImport]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
[Guid("a5cd92ff-29be-454c-8d04-d82879fb3f1b")]
internal interface IVirtualDesktopManager {
int IsWindowOnCurrentVirtualDesktop(IntPtr topLevelWindow);
Guid GetWindowDesktopId(IntPtr topLevelWindow);
void MoveWindowToDesktop(IntPtr topLevelWindow, ref Guid desktopId);
}
[ComImport]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
[Guid("92CA9DCD-5622-4bba-A805-5E9F541BD8C9")]
internal interface IObjectArray {
void GetCount(out int count);
void GetAt(int index, ref Guid iid, [MarshalAs(UnmanagedType.Interface)]out object obj);
}
[ComImport]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
[Guid("6D5140C1-7436-11CE-8034-00AA006009FA")]
internal interface IServiceProvider10 {
[return: MarshalAs(UnmanagedType.IUnknown)]
object QueryService(ref Guid service, ref Guid riid);
}
}
Next is Desktop.cs. It contains the friendly C# classes that you can use in your code:
using System;
using System.Runtime.InteropServices;
namespace Windows10Interop
{
public class Desktop {
public static int Count {
// Returns the number of desktops
get { return DesktopManager.Manager.GetCount(); }
}
public static Desktop Current {
// Returns current desktop
get { return new Desktop(DesktopManager.Manager.GetCurrentDesktop()); }
}
public static Desktop FromIndex(int index) {
// Create desktop object from index 0..Count-1
return new Desktop(DesktopManager.GetDesktop(index));
}
public static Desktop FromWindow(IntPtr hWnd) {
// Creates desktop object on which window <hWnd> is displayed
Guid id = DesktopManager.WManager.GetWindowDesktopId(hWnd);
return new Desktop(DesktopManager.Manager.FindDesktop(ref id));
}
public static Desktop Create() {
// Create a new desktop
return new Desktop(DesktopManager.Manager.CreateDesktop());
}
public void Remove(Desktop fallback = null) {
// Destroy desktop and switch to <fallback>
var back = fallback == null ? DesktopManager.GetDesktop(0) : fallback.itf;
DesktopManager.Manager.RemoveDesktop(itf, back);
}
public bool IsVisible {
// Returns <true> if this desktop is the current displayed one
get { return object.ReferenceEquals(itf, DesktopManager.Manager.GetCurrentDesktop()); }
}
public void MakeVisible() {
// Make this desktop visible
DesktopManager.Manager.SwitchDesktop(itf);
}
public Desktop Left {
// Returns desktop at the left of this one, null if none
get {
IVirtualDesktop desktop;
int hr = DesktopManager.Manager.GetAdjacentDesktop(itf, 3, out desktop);
if (hr == 0) return new Desktop(desktop);
else return null;
}
}
public Desktop Right {
// Returns desktop at the right of this one, null if none
get {
IVirtualDesktop desktop;
int hr = DesktopManager.Manager.GetAdjacentDesktop(itf, 4, out desktop);
if (hr == 0) return new Desktop(desktop);
else return null;
}
}
public void MoveWindow(IntPtr handle) {
// Move window <handle> to this desktop
DesktopManager.WManager.MoveWindowToDesktop(handle, itf.GetId());
}
public bool HasWindow(IntPtr handle) {
// Returns true if window <handle> is on this desktop
return itf.GetId() == DesktopManager.WManager.GetWindowDesktopId(handle);
}
public override int GetHashCode() {
return itf.GetHashCode();
}
public override bool Equals(object obj) {
var desk = obj as Desktop;
return desk != null && object.ReferenceEquals(this.itf, desk.itf);
}
private IVirtualDesktop itf;
private Desktop(IVirtualDesktop itf) { this.itf = itf; }
}
internal static class DesktopManager {
static DesktopManager() {
var shell = (IServiceProvider10)Activator.CreateInstance(Type.GetTypeFromCLSID(Guids.CLSID_ImmersiveShell));
Manager = (IVirtualDesktopManagerInternal)shell.QueryService(Guids.CLSID_VirtualDesktopManagerInternal, Guids.IID_IVirtualDesktopManagerInternal);
WManager = (IVirtualDesktopManager)Activator.CreateInstance(Type.GetTypeFromCLSID(Guids.CLSID_VirtualDesktopManager));
}
internal static IVirtualDesktop GetDesktop(int index) {
int count = Manager.GetCount();
if (index < 0 || index >= count) throw new ArgumentOutOfRangeException("index");
IObjectArray desktops;
Manager.GetDesktops(out desktops);
object objdesk;
desktops.GetAt(index, Guids.IID_IVirtualDesktop, out objdesk);
Marshal.ReleaseComObject(desktops);
return (IVirtualDesktop)objdesk;
}
internal static IVirtualDesktopManagerInternal Manager;
internal static IVirtualDesktopManager WManager;
}
}
And finally a little test WinForms project that I used to test the code. Just drop 4 buttons on a form and name them buttonLeft/Right/Create/Destroy:
using Windows10Interop;
using System.Diagnostics;
...
public partial class Form1 : Form {
public Form1() {
InitializeComponent();
}
private void buttonRight_Click(object sender, EventArgs e) {
var curr = Desktop.FromWindow(this.Handle);
Debug.Assert(curr.Equals(Desktop.Current));
var right = curr.Right;
if (right == null) right = Desktop.FromIndex(0);
if (right != null) {
right.MoveWindow(this.Handle);
right.MakeVisible();
this.BringToFront();
Debug.Assert(right.IsVisible);
}
}
private void buttonLeft_Click(object sender, EventArgs e) {
var curr = Desktop.FromWindow(this.Handle);
Debug.Assert(curr.Equals(Desktop.Current));
var left = curr.Left;
if (left == null) left = Desktop.FromIndex(Desktop.Count - 1);
if (left != null) {
left.MoveWindow(this.Handle);
left.MakeVisible();
this.BringToFront();
Debug.Assert(left.IsVisible);
}
}
private void buttonCreate_Click(object sender, EventArgs e) {
var desk = Desktop.Create();
desk.MoveWindow(this.Handle);
desk.MakeVisible();
Debug.Assert(desk.IsVisible);
Debug.Assert(desk.Equals(Desktop.Current));
}
private void buttonDestroy_Click(object sender, EventArgs e) {
var curr = Desktop.FromWindow(this.Handle);
var next = curr.Left;
if (next == null) next = curr.Right;
if (next != null && next != curr) {
next.MoveWindow(this.Handle);
curr.Remove(next);
Debug.Assert(next.IsVisible);
}
}
}
The only real quirk I noticed while testing this is that moving a window from one desktop to another can move it to the bottom of the Z-order when you first switch the desktop, then move the window. No such problem if you do it the other way around.
There is this guy that made a application to map keyboard shorcut to move a window between virtual desktop.
https://github.com/Grabacr07/SylphyHorn
(I use it every day )
He has a blog where he explain what he did
http://grabacr.net/archives/5701 ( you can use google translate it is in japanese)
He in fact used the same api mantionned in the Alberto Tostado response.
http://www.cyberforum.ru/blogs/105416/blog3671.html
and the api can be found on his github https://github.com/Grabacr07/VirtualDesktop
The api is really simple to use BUT it seems impossible to move a window from another process.
public static bool MoveToDesktop(IntPtr hWnd, VirtualDesktop virtualDesktop)
{
ThrowIfNotSupported();
int processId;
NativeMethods.GetWindowThreadProcessId(hWnd, out processId);
if (Process.GetCurrentProcess().Id == processId) // THAT LINE
{
var guid = virtualDesktop.Id;
VirtualDesktop.ComManager.MoveWindowToDesktop(hWnd, ref guid);
return true;
}
return false;
}
To workaround this problem they made another implementation that they use alongside the one in the russian blog
if (VirtualDesktopHelper.MoveToDesktop(hWnd, right) //<- the one in the russian blog
|| this.helper.MoveWindowToDesktop(hWnd, right.Id)) <- the second implementation
The second implementation can be found here: https://github.com/tmyt/VDMHelper
This one can move a window from another process to another desktop. BUT it is buggy right now. For exemple when i try to move some window like google chrome it crash.
So this is the result of my research. I m rigth now trying to make a StickyWindow feature with these api.
I fear that all about "Virtual desktops" in Windows 10 is undocumented, but in a Russian page I've seen documented the interfaces. I don't speak Russian but seems that they have used reversed engineering. Anyway, the code is very clear (Thanks to them!).
Keep an eye here:
http://www.cyberforum.ru/blogs/105416/blog3671.html
I've been trying to see if the old API's CreateDesktop, OpenDesktop, etc... is linked to the new Virtual-Desktops, but no way...
The interfaces work with the final production release of Windows 10 (2015-05-08), but you shouldn't use them in a real wide distributed application until Microsoft documents them. Too much risk.
Regards.
I am working on a j2me application which contain a class to find the location of mobile using GPS.I need to include gauge while the location provider API is called and it finds the location.I am new to j2me so still not clear with all the concepts.I am pasting my code below.Please help me through this.Thanks in advance..
package org.ets.utils;
import javax.microedition.lcdui.*;
import javax.microedition.location.*;
import javax.microedition.io.*;
import java.io.*;
import org.ets.midlet.ETS_infozech;
import javax.microedition.midlet.*;
public class Locfinder {
public Locfinder(ETS_infozech midlet)
{
this.midlet = midlet;
}
public static String ex()
{
try {
checkLocation();
} catch (Exception ex)
{
ex.printStackTrace();
}
//System.out.println(string);
return string;
}
public static void checkLocation() throws Exception
{
Location l;
LocationProvider lp;
Coordinates c;
// Set criteria for selecting a location provider:
// accurate to 500 meters horizontally
Criteria cr= new Criteria();
cr.setHorizontalAccuracy(500);
// Get an instance of the provider
lp= LocationProvider.getInstance(cr);
//Request the location, setting a one-minute timeout
l = lp.getLocation(60);
c = l.getQualifiedCoordinates();
if(c != null ) {
// Use coordinate information
double lat = c.getLatitude();
double lon = c.getLongitude();
string = " LAT-" + lat + " LONG-" + lon;
}
}
}
There's no way you can link a Gauge to some task.
You have to set values to the Gauge manually. So you'd create a Gauge and add it to your Form. Then start your code to perform the look-up.
In between your lines of code, you'd add myGauge.setValue(some_value); to increase the indicator.
Of course, this becomes difficult when most of the task is contained in a single line of code, like e.g. lp.getLocation(60);.
I think, in that case, I would create a Thread that automatically increases the value on the Gauge in the 60 seconds, but can be stopped/overridden by a manual setting.
class Autoincrementer implements Runnable {
private boolean running;
private Gauge gauge;
private int seconds;
private int secondsElapsed;
public Autoincrementer(Gauge gauge) {
this.gauge = gauge;
this.seconds = gauge.getMaxValue();
this.running = true;
this.secondsElapsed = 0;
}
public void run() {
if (running) {
secondsElapsed++;
gauge.setValue(secondsElapsed);
if (secondsElapsed>=gauge.getMaxValue()) running = false; // Stop the auto incrementing
try {
Thread.sleep(1000); // Sleep for 1 second
} catch (Exception e) {}
}
}
public void stop() {
running = false;
}
}
You would then create a Gauge and add it to your Form
myGauge = new Gauge("Process", false, 60, 0);
myForm.append(myGauge);
Then start the auto-increment.
myIncrementer = new Autoincrementer(myGauge);
new Thread(myIncrementer).start();
And then call your look-up code.
checkLocation();
Inside your look-up code, add code to stop the auto-incrementing and set the Gauge object to 100%, if the look-up was successful (meaning before the timeout).
myIncrementer.stop();
myGauge.setValue(60);
LWUIT 1.5 can help you in this. Am not sure for Location API which you are using.
But you will get Gauge using LWUIT 1.5. Use Lwuit instead of LCDUI.
http://www.oracle.com/technetwork/java/javame/javamobile/download/lwuit/index.html