Related
Hi,
I need to use the C++ version of this. The code should gather information and show this in a notification.
The notification works but I want to receive the choice the user made in the html form.
I know I need to use the hwsink, a message map, and some events but cannot find info (book, example, etc.) how.
Could some one finish this code so I can test what has been chosen. If NOT, please give me an C++ example from which I can learn/copy. I have been searching on google for days now
Thx, for your help
BTW:
I started with this http://www.krvarma.com/?p=146 downloaded code but was a bit to complicated. In it is all I need but i would like it to be in 1 cpp file.
I'm offering 2 beers if you have the solution
Code:
#include "stdafx.h"
#include <stdlib.h>
#include "resource.h"
// {4E8A9888-D15C-4395-9C9A-B4B572F20081}
static const GUID NOTIFICATION_GUID =
{ 0x4e8a9888, 0xd15c, 0x4395, { 0x9c, 0x9a, 0xb4, 0xb5, 0x72, 0xf2, 0x0, 0x81 } };
int _tmain(int argc, _TCHAR* argv[])
{
SHNOTIFICATIONDATA stcNtData = {0};
stcNtData.cbStruct = sizeof(stcNtData);
stcNtData.dwID = 1;
stcNtData.npPriority = SHNP_INFORM;
stcNtData.csDuration = 15;
// stcNtData.hicon = LoadIcon((HINSTANCE)GetModuleHandle(NULL), MAKEINTRESOURCE(IDI_ICON2));
stcNtData.clsid = NOTIFICATION_GUID;
//What todo here... stcNtData.hwndSink = hWnd;
stcNtData.grfFlags = SHNF_SILENT | SHNF_TITLETIME | SHNF_CRITICAL | SHNF_FORCEMESSAGE;
stcNtData.pszTitle = L"ReRemind";
//stcNtData.pszHTML = TEXT("<html><body>This is a sample application to show the SHNotificationAdd API")
// TEXT("<p><b>This line should be bold</b>.<br><i>This one should be italics.</i><br>")
// TEXT("This is a line with a <a href='cmd:10000'>link</a></p>")
// TEXT("<p>This is a line with <input type='button' name='cmd:10001' value='Click'></p><br><br><br><br>");
stcNtData.pszHTML = TEXT("<form method='get' action='TestBubble://Test'>")
TEXT("<table width=100% cellspacing=0 cellpadding=0>")
TEXT("<tr><td colspan=2>")
TEXT("<b>Choose a fruit:</b><p>")
TEXT("<input type='radio' value='0' id='Apples' checked name='Fruit'><label for='Apples'>Apples</label><br>")
TEXT("<input type='radio' value='1' id='Oranges' name='Fruit'><label for='Oranges'>Oranges</label></p></td><td>")
TEXT("<input type='submit' value='Submit' name='Submit'>")
TEXT("</td></tr><tr><td width=42>")
TEXT("<a href='cmd:12288'>Settings</a></td></tr></table></form><br><br><br><br>");
SHNotificationAdd(&stcNtData);
Sleep(15000);
SHNotificationRemove(&NOTIFICATION_GUID, 1);
return 0;
}
I'm offering beers now. No need to finish it, just give me some hints
Hi,
as I understand your article (http://www.krvarma.com/?p=146)
you need to create window, then assign it's HWND
to SHNOTIFICATIONDATA member HWND hwndSink;
then "The system will send WM_COMMAND with wParam set to 1000 to the hwndSink window." so - you need to handle WM_COMMAND in your window and check wParam - if it is equal to your parameter, then this message means "system sends you user choice from your html".
serfer222 said:
Hi,
as I understand your article (http://www.krvarma.com/?p=146)
you need to create window, then assign it's HWND
to SHNOTIFICATIONDATA member HWND hwndSink;
then "The system will send WM_COMMAND with wParam set to 1000 to the hwndSink window." so - you need to handle WM_COMMAND in your window and check wParam - if it is equal to your parameter, then this message means "system sends you user choice from your html".
Click to expand...
Click to collapse
Exactly as i understand it.
So I tried copying code from that article into my code but got stuck with really not understandable compiler errors. I think I need to find a good book explaining this message map.
The first thing I do not understand is that I only want to show the notification bubble (is working). If I create a windows handle (how?) will this overwrite the current screen (this is something I do not want).
window can be invisible.
I'm Win32 programmer, and I don't know exactly about WinCE.
If you are using VisualC++, I think you should use MFC, it's very easy to create window and then create message handler for this window.
search google for some
"WinCE c++ tutorial" and you will find how to create window and setup message loop. (add "Hello world" phrase to your search - this is usually used as very first example)
for example: http://www.codeproject.com/KB/mobile/ltwtdlg.aspx
serfer222 said:
window can be invisible.
I'm Win32 programmer, and I don't know exactly about WinCE.
If you are using VisualC++, I think you should use MFC, it's very easy to create window and then create message handler for this window.
search google for some
"WinCE c++ tutorial" and you will find how to create window and setup message loop. (add "Hello world" phrase to your search - this is usually used as very first example)
for example: http://www.codeproject.com/KB/mobile/ltwtdlg.aspx
Click to expand...
Click to collapse
Can you switch between MFC, ATL, etc. ? I know they are some kind of libraries but thought "don't look at it, there too much to learn/understand anyway ".
I've search but somehow you think there is the solution and then you learn the hard way, it's very old code. Will search further offcourse and I am reading a chapter on classes and if I can find; messages.
it's already very easy to handle messages without any MFC overload. Just check the uMsg parameter in your DefWindowProc. If you create a new Win32 project in Visual C++ wizard then you see what it's looking like. This is mandatory knowledge. Usually first thing you learn after Hello World. If you didn't know about message processing in Windows/Wince then it's the same like sitting in a car and don't know how to turn the keys.
Do you know how to open dsm file in textbox???
RAMMANN said:
it's already very easy to handle messages without any MFC overload. Just check the uMsg parameter in your DefWindowProc. If you create a new Win32 project in Visual C++ wizard then you see what it's looking like. This is mandatory knowledge. Usually first thing you learn after Hello World. If you didn't know about message processing in Windows/Wince then it's the same like sitting in a car and don't know how to turn the keys.
Click to expand...
Click to collapse
Thats how I feel exactly. It's strange. I read quickly thru 3 books about C++ and no mention of these messages. C#/Basic are easier to understand because of all the examples.
Found these:
- http://www.youtube.com/watch?v=kWVGqV2Yklw
- http://www.youtube.com/watch?v=cbe6yxBHEiU
The video does explain that the linked example doesn't look so different. What a lot of source code Ms creates for you..
If created a WIN32 smart device project and DefWindowsProc is only called when to pass the message to other programs. I need the windows handle for the notification and NOT display the window.
But again it's a bit to much for me at this moment. I haven't got a solution yet..Could somebody help me with not displaying this window. I would still like to use the windows handle to make sure I get the callbakcs to the WM_COMMAND.
Yes - I think you only need at end of WinMain before SHNotificationRemove
to add:
Code:
while (GetMessage(&msg, NULL, 0, 0))
{
if (!TranslateAccelerator(msg.hwnd, hacc, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
Then a new function:
Code:
/* Redefine generic HANDLE_WM_ACTIVATE macro for Pocket PC */
#undef HANDLE_WM_ACTIVATE
#define HANDLE_WM_ACTIVATE(hwnd,wParam,lParam,fn) \
(SHHandleWMActivate((hwnd), (wParam), (lParam), &g_sai, 0), /*return*/ 0L)
/* Redefine generic HANDLE_WM_SETTINGCHANGE macro for Pocket PC */
#undef HANDLE_WM_SETTINGCHANGE
#define HANDLE_WM_SETTINGCHANGE(hwnd,wParam,lParam,fn) \
(SHHandleWMSettingChange((hwnd), (wParam), (lParam), &g_sai), /*return*/ 0L)
static LRESULT CALLBACK MainWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch (msg)
{
HANDLE_MSG(hwnd, WM_CREATE, Main_OnCreate);
HANDLE_MSG(hwnd, WM_ACTIVATE, /* SHHandleWMActivate()*/ 0);
HANDLE_MSG(hwnd, WM_SETTINGCHANGE, /* SHHandleWMSettingChange() */ 0);
HANDLE_MSG(hwnd, WM_PAINT, Main_OnPaint);
HANDLE_MSG(hwnd, WM_COMMAND, Main_OnCommand);
HANDLE_MSG(hwnd, WM_DESTROY, Main_OnDestroy);
[B]// Remark: Here you can add more messages - also for what user has chosen.[/B]
default:
return DefWindowProc(hwnd, msg, wParam, lParam);
}
}
and then the message handlers like this:
Code:
static BOOL Main_OnCreate(HWND hwnd, CREATESTRUCT *pcs)
{
SHMENUBARINFO mbi;
memset(&mbi, 0, sizeof(mbi));
mbi.cbSize = sizeof(mbi);
mbi.hwndParent = hwnd;
mbi.nToolBarId = IDR_MNU_MAIN;
mbi.hInstRes = g_hInstance;
if (!SHCreateMenuBar(&mbi)) /* create the menu bar */
return FALSE;
g_hwndMB = mbi.hwndMB;
return TRUE;
}
But your Compiler should already make such a project by default and you can simple add the code fom _tmain to WinMain, which you've posted above.
Greetz
Micha
Thank you, yesterday I debugged and and debugged trying to understand how this works but the debugger doesn't stop always in all source code.
If f.i. you click on the screen I expected this to be an event, but the debugger didn't stop at all. Is there a command to always stop when a line of code is processed? Now it only stops when I have set a break point. I want to see every line processed...
I will try to implement your suggestions. For a newby it still looks difficult I hope someday I will look back to this and say "wow, that was so easy".
ajhvdb said:
Thank you, yesterday I debugged and and debugged trying to understand how this works but the debugger doesn't stop always in all source code.
If f.i. you click on the screen I expected this to be an event, but the debugger didn't stop at all. Is there a command to always stop when a line of code is processed? Now it only stops when I have set a break point. I want to see every line processed...
I will try to implement your suggestions. For a newby it still looks difficult I hope someday I will look back to this and say "wow, that was so easy".
Click to expand...
Click to collapse
Well, actually that's the reason why breakpoints exist. To stop the debugger and allow you look at the running code..... or what else did you think??
RAMMANN said:
Well, actually that's the reason why breakpoints exist. To stop the debugger and allow you look at the running code..... or what else did you think??
Click to expand...
Click to collapse
I want to say "stop and show at the current code line".
For example you start your program, goto the appropiate window, type in some data and NOW before you click on SAVE. You say to your debugger "catch this/coming event".
Debugger would stop if you'd handle this event and set break point to 1st command of this function.
then yo can go step by step through each line of code.
and hey: it's not soo easy,which I posted.But your Compiler (vs2008 or PellesC or whatever) would make this automatically for you and you only have to copy your part of code into WinMain of this automatic processed code.
The "Managers" then can help you also to add eventhandlers automatically.
you only have to set Breakpoints to the automatic processed Event-Handle-Function - them you can see,if this event is triggered like you want it.
You only think from the wrong direction
Ok, I learned a lot.
(The VS2008 debugger has bugs. If I set a breakpoint on line 100, and start debug, line 109 has the breakpoint. It looks like only the original code can be debugged)
I did start a new project and used the tips from above. I can catch a click on a link ahref field in the notification bubble.
I have disabled the screen so only the bubble is shown
Now I need to catch the menu button and more important the data in the html form (input type radio) in the notification bubble. For this I need to convert the param to a structure...!
I also need to extend the "while getmessage" loop with a timer. If 15 seconds have passed, I need to step out of the loop and quit automatically.
A lot of searching again.
BTW.
Thx all for helping me. Not really one tip did it, you all guided me a bit. If you think your tip helped me a lot then send me a PM with your paypal code. You can also send me your address/or your businessaddress. I will send you a small present/surprise related to my country (Holland).
in Germany we have a good cheese, too and the sense of a community like this great one,is for helping each other-especially beneath developers.
And it's always a question of finding out,how to manage something new
All the best for your further development.
Micha
Attached is the code of my subproject. I will update it if those last points are done. Hope it helps others.
If someone has a link or example code for those points. (or improvements of my code) please let me know.
Hi gents.
I want to ask you,how can I use external font loaded from ttf file in my app,developed under Embedded Visual C++?
I need to easily change color and size of the font and using the DrawText() function make an output into current DC.
Can someone make an example for me please?
Thank you.
Here's the bare bones of it ,you'll have to flesh it out to suit. It might not be perfect but it works.
Global Variable
Code:
HFONT g_hfont;
Forward declaration of EnumFontProc()
Code:
int CALLBACK EnumFontsProc(LOGFONT *lplf, TEXTMETRIC *lptm, DWORD dwType, LPARAM lpData);
In WM_PAINT print it out. I'll use Wingdings. The name in the EnumFonts must match the actual name of the font as declared in the TTF file.
Code:
case WM_PAINT:
RECT rt;
hdc = BeginPaint(hWnd, &ps);
GetClientRect(hWnd, &rt);
EnumFonts(hdc,TEXT("Wingdings"),(FONTENUMPROC) EnumFontsProc,NULL);
SelectObject(hdc,g_hfont);
DrawText(hdc,TEXT("12345"),5, &rt, DT_SINGLELINE | DT_VCENTER | DT_CENTER);
DeleteObject(g_hfont);
EndPaint(hWnd, &ps);
break;
In EnumFontsProc set the font to the first font given. Returning 0, ends the enumeration, non zero, give me the next.
To change the size do it here by changing lplf->lfHeight and lplf->lfWidth
Code:
int CALLBACK EnumFontsProc(LOGFONT *lplf, TEXTMETRIC *lptm, DWORD dwType, LPARAM lpData)
{
g_hfont = CreateFontIndirect(lplf);
return 0;
}
To load and release your font add the code below to the message handling sections.
Code:
WM_CREATE:
AddFontResource(TEXT("\\Storage Card\\myfont.TTF"));
WM_DESTROY:
RemoveFontResource(TEXT("\\Storage Card\\myfont.TTF"));
Here's the proof it works, (with Wingdings anyway!)
Thanks man,I will try it ASAP.
Well,is it possible to read the ttf file directly from exe resource also?
I am still learning C++,so some things are a bit unclear for me. Can you please post this source?
This stuff is explained fully at:
http://msdn.microsoft.com/en-us/library/aa911455.aspx
I've just taken a few shortcuts with it.
The zip file contains the main .cpp file of the above project. It does not include the AddFontResource or RemoveFontResource statements.
Create a shell WinMo application and replace the main program .cpp file with it.
AddFontResource can only accept the path to a True Type font TTF file as an argument.
The thing you have got to get your head around are CALLBACK routines, they are used during most enumeration routines, and are widely used in Win32 for all sorts of things. A Win32 app's WndProc it itself a callback routine. In the case of EnumFonts, you pass the address of the callback routine to the enumerating function, which will call your function once for every instance it finds that matches your request. You terminate the sequence by returning 0 or it will carry on until there are no instances left. You have to decide what to do with the results. In my case I take the first Wingding font I'm offered, then quit.
Be aware that there is little, or no error handling in this code. I cobbled it together pretty quickly to prove the point.
I remember reading somewhere that if you drop the .TTF file in the Windows directory, and do a soft reset, then Windows will pick it up as a resident font, so the AddFontResource and RemoveFontResource functions are not required. EnumFonts() should know about it, and present it accordingly.
Well,thank you very much for that,but can you please provide me full project source,including all the files? With working project,I can better understand the font loading principle.
Unfortunately,I am too busy nowadays to discover something,that I don't understand well,so every time save is a big plus for me. Thank you very much again.
Attached,
But, it is a VS 2008 Smart Device project. EVC won't read it.
You will have to create a shell hello world project in EVC and copy the modified code in the panels above from TestFont.CPP.
Hello.
Actually i've got it working,but I still cannot discover,how to resize the font.
Where should I exactly put the lfWidth and lfHeight?
I am now a bit confused of that.
This is my code:
Functions and declarations of HFONT,CALLBACK,WM_CREATE,WM_DESTROY are present as you described.
void ShowNumber(HDC hdc, int Value,int xrect,int yrect,int wrect,int hrect,HBITMAP source)
{
EnumFonts(hdc,TEXT("Sam's Town"),(FONTENUMPROC) EnumFontsProc,NULL);
SelectObject(hdc,g_hfont);
TCHAR szText[MAX_LOADSTRING];
int width,height;
rtText.right=wrect;rtText.bottom=hrect;width=wrect-xrect;height=hrect-yrect;
TransparentImage(hdc,xrect,yrect,width,height,source,xrect,yrect,width,height,RGB(255,0,255));
SetBkMode(hdc,TRANSPARENT);
if(Value<10) wsprintf (szText, TEXT ("0%d"),Value);else wsprintf (szText, TEXT ("%d"),Value);
rtText.left=xrect ;rtText.top=yrect ;SetTextColor(hdc,RGB(0,0,0)); DrawText(hdc,szText,2,&rtText,DT_SINGLELINE | DT_LEFT | DT_TOP);
DeleteObject(g_hfont);
}
int CALLBACK EnumFontsProc(LOGFONT *lplf, TEXTMETRIC *lptm, DWORD dwType, LPARAM lpData)
{
g_hfont = CreateFontIndirect(lplf);
return 0;
}
Click to expand...
Click to collapse
This doesn't work:
lplf.lfWidth=0;
g_hfont = CreateFontIndirect(lplf);
Click to expand...
Click to collapse
Actually I want to put one more parameter into ShowNumber() function,which will tell the function the size of the font.
You are nearly there...........
The code to set the font size will have to go in here.......
Code:
int CALLBACK EnumFontsProc(LOGFONT *lplf, TEXTMETRIC *lptm, DWORD dwType, LPARAM lpData)
{
lplf->lfHeight=14;
lplf->lfWidth=8;
g_hfont = CreateFontIndirect(lplf);
return 0;
}
Or whatever your values are, I just picked 8 and 14 as examples. If these values are passed as variables to another function above, store them as global variables, and use them here.
As lplf is passed to this function as a pointer to a LOGFONT structure, you have to use the -> operator to access its members. lplf.lfHeight won't work as you mentioned, that is for predeclared or static structures.
These values have to be changed here in the EnumFontsProc() routine before the font is created, as we are passing that pointer to create the font.
Good Luck!!
P.S. While we are here, let's tidy it up a bit.
Replace:
Code:
if(Value<10) wsprintf(szText,TEXT ("0%d"),Value);else wsprintf (szText,TEXT("%d"),Value);
with
Code:
wsprintf(szText, TEXT ("02%d"),Value);
A very big thanks for that.
I am still beginner in C++,so something can look very comic for others.
My beloved programming language is Pascal.
I really didn't think,that -> is an operator,I've just mentioned,you wrote it as something else(something like "to")
You are more than welcome.
Some features in C/C++ are not immediately obvious, but the real battle is fighting your way through the Win32 programming model, trying to get it to do what you want. Sometimes the simplest of things become maddeningly complicated, but the effort to do it properly is usually worth the effort.
Glad you got it working, best wishes, stephj.
Hello a bit later.
First of all,thank your for your explanation and now I am using this method successfuly.
I want to ask you now,if there is a way to get fixed pitch of the font,that is truetype. With standart font I can achieve with this...
lf.lfPitchAndFamily = (tm.tmPitchAndFamily & 0xf0) | TMPF_FIXED_PITCH;
I am using font,that displays numbers in "digital" mode(7-segment display) and I get the number "1" very narrow in comparison with others(actually it is narrow on any kind display,but is displayed on right segments,so "01" has adequate spacing on hard display). Now I get "0l_" instead of "0_l",that's not preferable.
Thanks in advance for reactions.
I don't think there the above method will work as each character has it own width associated with it.
A simpler approach, a bit of a pain, but which should work, is to draw/print the numeric value out one character at a time using DrawText(). Set a RECT structure up to hold the coordinates of the top left and bottom right of the area for each character.
Setting uFormat to DT_RIGHT will force the character to right align in the RECT area, so the '1' should appear correctly. Move the left and right values along a fixed amount for each character. A bit of trial and error will be involved first until you get the values just right.
Good luck, stephj.
Hi there,
Does anyone out there how to preserve/restore the transient state of a CheckBox and/or Radio button?
So far, I'm using the following code, working for textbox
Code:
Public Sub PreserveState_TextBox(ByVal TB As TextBox)
Dim buffer As String = String.Empty
If True = PhoneApplicationService.Current.State.ContainsKey(TB.Name) Then
buffer = TryCast(PhoneApplicationService.Current.State(TB.Name), String)
If Not String.IsNullOrEmpty(buffer) Then
TB.Text = buffer
End If
End If
End Sub
Public Sub RestoreState_TextBox(ByVal TB As TextBox)
If True = PhoneApplicationService.Current.State.ContainsKey(TB.Name) Then
PhoneApplicationService.Current.State.Remove(TB.Name)
End If
PhoneApplicationService.Current.State.Add(TB.Name, TB.Text)
End Sub
it possible to modify the above code to work for Checkbox and/or Radiobutton?
If not, any ideas?
So far, I've been trying the sample "Tombstoning" sample code from Microsoft without any luck...
Thanks in advance!
Hi,
I'm not a VB developer, but storing the state of a checkbox is not much different from storing any other primitive type. What you could do is have a bool variable "isCbChecked" and store that bool state in your PhoneApplicationService.State.
Code:
PhoneApplicationService.Current.State.Add("isCbChecked", myCheckbox.IsChecked)
Then, when you're restoring your app, simply do
Code:
myCheckbox.IsChecked = (bool)PhoneApplicationService.Current.State.ContainsKey("isCbChecked");
keyboardP said:
Hi,
I'm not a VB developer, but storing the state of a checkbox is not much different from storing any other primitive type. What you could do is have a bool variable "isCbChecked" and store that bool state in your PhoneApplicationService.State.
Code:
PhoneApplicationService.Current.State.Add("isCbChecked", myCheckbox.IsChecked)
Then, when you're restoring your app, simply do
Code:
myCheckbox.IsChecked = (bool)PhoneApplicationService.Current.State.ContainsKey("isCbChecked");
Click to expand...
Click to collapse
Thanks a lot for your fast reply.
Can I ask for additional help on how to make your statements into generic procedures, at least to take them to something similar to what I posted?
Don't care if it's in C#
Thanks in advance!
GFR_2009 said:
Thanks a lot for your fast reply.
Can I ask for additional help on how to make your statements into generic procedures, at least to take them to something similar to what I posted?
Don't care if it's in C#
Thanks in advance!
Click to expand...
Click to collapse
Off the top of my head, something like this should work (C# code).
Code:
public static T RestoreState<T>(string key)
{
if (PhoneApplicationService.Current.State.ContainsKey(key))
{
return (T)PhoneApplicationService.Current.State[key];
}
return null;
}
'T' is the type that will be used. In C# 'T' is a special character denoting the generic type, not something I just used
So in the code above, the return type is 'T' and when using RestoreState, it will be 'RestoreState<Textbox>("TB.Name");'. The value of 'TB.Name' will be searched within the dictionary and, if it's found, it will cast that object as 'T' (Textbox) and return it, otherwise it will return null.
Hi,
So far, I did the following and while no error is raised, nothing happens...
Code:
Public Function Backup(ByVal token As String, ByVal value As Object) As Boolean
If Nothing Is value Then
Return False
End If
Dim store = PhoneApplicationService.Current.State
If store.ContainsKey(token) Then
store(token) = value
Else
store.Add(token, value)
End If
Return True
End Function
Public Function Restore(Of T)(ByVal token As String) As T
Dim store = PhoneApplicationService.Current.State
If Not store.ContainsKey(token) Then
Return Nothing
End If
Return CType(store(token), T)
End Function
I call them as follows
Code:
Backup(Me.CheckBox_1.Name, Me.CheckBox_1)
Restore(Of CheckBox)(Me.CheckBox_1.Name)
Don't where is the error, maybe you could take a look and help me out.
Any help is much appreciated!
Where are you calling the Backup and Restore functions? Since your doing page specific things, you could do it in the OnNavigatedFrom and OnNavigatedTo methods, respectively.
keyboardP said:
Where are you calling the Backup and Restore functions? Since your doing page specific things, you could do it in the OnNavigatedFrom and OnNavigatedTo methods, respectively.
Click to expand...
Click to collapse
Hi,
I'm calling them in the OnNavigatedTo and OnNavigatedFrom methods, as you pointed out
Unfortunately, nothing happens at all!
Thanks!
Hi,
As far as I can tell, there's nothing wrong with your saving/loading code. When you call
"Restore(Of CheckBox)(Me.CheckBox_1.Name)", is that returning a bool? You need to assign that bool to the checkbox:
Code:
myCheckbox.IsChecked = Restore(Of CheckBox)(Me.CheckBox_1.Name);
Also, all variables are reset when the page loads, so make sure you have set "myCheckbox.IsChecked" anywhere else on the page that could be called when the page loads.
Please, check the converted code of the above functions, to C#
Code:
public bool Backup(string token, object value)
{
if (null == value)
{
return false;
}
var store = PhoneApplicationService.Current.State;
if (store.ContainsKey(token))
{
store(token) = value;
}
else
{
store.Add(token, value);
}
return true;
}
public T Restore<T>(string token)
{
var store = PhoneApplicationService.Current.State;
if (! (store.ContainsKey(token)))
{
return default(T);
}
return (T)(store(token));
}
Do you think they are OK?
How should I call them ?
Clearly, the restore does not returns a boolean...
Honestly, I'm lost now!
Hope this helps to find the culprit.
It seems okay to me. You'll have to do some debugging. Set a breakpoint inside the Backup and Restore methods. Step through each line and make sure it's going to the line you expect it to and that the value being set is the correct one.
I haven't seen the tombstoning sample from MSDN, but can you get that to work? If so, is the generic method causing the problem? Or can you not get it to work at all?
Hi,
Sorry for the delay in getting back, but I was trying different codes and at least I found the cause.
Code:
Me.NavigationService.Navigate(New Uri("/PivotPage1.xaml?Name=" & "John", UriKind.Relative))
[B]Me.NavigationService.GoBack[/B]()
Me.NavigationService.Navigate(New Uri("/PivotPage1.xaml", UriKind.Relative))
Everything works fine, and the Checkbox state is saved/restored (in the Pivot Page) if I GO BACK using the GoBack hardware button or Me.NavigationService.GoBack
But, the state's dictionary entry is lost or ignored if I go back with the Navigate service (lines 1 and 3)...
Problem is that I need to get back with the query string...
The query string contains a value taken in the SelectedItem event of PAGE2's ListBox, and automatically once retrieved must go back.
I didn't know until know, that NavigationService.Navigate creates a new page instance or something like that in the backstack...
Any sugestions are welcomed!
Hi,
There are various methods you can use depending on the app's architecture. For example, you could have a 'shared' class that contains a shared field that holds the SelectedItem value. When the user selects the item, set the shared field's value and then when you go back, you can get the value from the shared field.
keyboardP said:
Hi,
There are various methods you can use depending on the app's architecture. For example, you could have a 'shared' class that contains a shared field that holds the SelectedItem value. When the user selects the item, set the shared field's value and then when you go back, you can get the value from the shared field.
Click to expand...
Click to collapse
So, no other way to cope with the navigation service?
It's a strange behaviour for sure...
Will try your ideas.
Thanks a lot for your reply!
GFR_2009 said:
So, no other way to cope with the navigation service?
It's a strange behaviour for sure...
Will try your ideas.
Thanks a lot for your reply!
Click to expand...
Click to collapse
There are other ways. For example, instead of using the PhoneApplicationService to store the tombstoning information, you could put it in a querystring for page 2. Then, in page 2, you could add the information from the previous page to a querystring AND the information of the selected item to the querystring. Navigate to page 1, with the querystring that contains information on what was there before and what the user selected. Tombstoning is there for when the user presses the hardware search button, home button, a phone call arrives etc.. It's not there for the navigation of the app. That's where querystrings, shared variables, binary serialization etc... come into play.
The concept of the navigation service is similar to a website. For example, when you submit something and then go back, it might still be there in the page state. However, if you submit something and then reload the previous page by typing it in the address bar, it becomes a completely new page as no state is stored.
keyboardP said:
There are other ways. For example, instead of using the PhoneApplicationService to store the tombstoning information, you could put it in a querystring for page 2. Then, in page 2, you could add the information from the previous page to a querystring AND the information of the selected item to the querystring. Navigate to page 1, with the querystring that contains information on what was there before and what the user selected. Tombstoning is there for when the user presses the hardware search button, home button, a phone call arrives etc.. It's not there for the navigation of the app. That's where querystrings, shared variables, binary serialization etc... come into play.
The concept of the navigation service is similar to a website. For example, when you submit something and then go back, it might still be there in the page state. However, if you submit something and then reload the previous page by typing it in the address bar, it becomes a completely new page as no state is stored.
Click to expand...
Click to collapse
Hi,
Will try your suggested approach, and thanks a lot for the last explanation on how the darn thing works.
Thanks again!
GFR_2009 said:
Hi,
Will try your suggested approach, and thanks a lot for the last explanation on how the darn thing works.
Thanks again!
Click to expand...
Click to collapse
You're welcome . It's one of those things that take a bit of time to understand, but starts to make sense. You might be interested in a free WP7 development ebook by Charles Petzold.
keyboardP said:
You're welcome . It's one of those things that take a bit of time to understand, but starts to make sense. You might be interested in a free WP7 development ebook by Charles Petzold.
Click to expand...
Click to collapse
I already have the book, but will need a deeper reading
So far, I've been testing your idea of using global classes and works ok.
Thanks a lot for being so cooperative, it's much appreciated!
GFR_2009 said:
I already have the book, but will need a deeper reading
So far, I've been testing your idea of using global classes and works ok.
Thanks a lot for being so cooperative, it's much appreciated!
Click to expand...
Click to collapse
No worries! If programming was super easy everyone would be doing it
keyboardP said:
No worries! If programming was super easy everyone would be doing it
Click to expand...
Click to collapse
Never said better!
I have a main form with a load of controls on it. I have a listbox, and a piece of code that is looking at individual items eg:
Code:
dim listitem as listboxitem = me.listbox.item(0)
when i use the navigationservice.navigate function to navigate to a different page, and then navigate back to the main page i can no longer edit that list box. The code still runs and doesnt error, but the list item is not updating. Its almost like there are two instances of the form open.
Any ideas?
thanks
when im navigating back to the main form i am using another navigationservice.navigate. Im guesing this is creating a new form everytime you use the .navigate as when i use navigationservice.goback from the second form it works fine.
To that end, is there a way you can close a form once you have navigated away from it using .navigate? and can you navigate to an already open form (without creating a new instance) and without using .goforward?
thanks (im using vb silverlight by the way)
adamrob69 said:
... i can no longer edit that list box. The code still runs and doesnt error, but the list item is not updating. Its almost like there are two instances of the form open.
Click to expand...
Click to collapse
Hmm... Could you explain what do you mean? How do you "edit" list box?
Post your code and explain what are you trying to do.
P.S. Have you tried to trace your code with breakpoints on the page constructors? Just try - you will be very surprised
Code:
''MainForm
sub EditListBox()
dim listitem as listboxitem = me.listbox.item(0)
listitem.content = "New List Text"
end sub
sub Navigate()
NavigationService.Navigate(new uri("/Page2.xml",relative))
end sub
Code:
''Form 2
sub NavigateBack()
NavigationService.Navigate(new uri("/MainForm.xml",relative))
end sub
The EditListBox() routine is called every x mins from a system timer. When navigated to form2 then back again the code still runs, i can put a break in and can see it running through the code but the listbox isn't updating. I believe this is because when you use the NavigationService.Navigate function it creates a new instance of the page. On form2 if I use NavigationSevice.GoBack instead of .navigate the main form updates the listbox correctly.
So if that is the case; is there a way you can close a form once you have navigated away from it using NavigationService.navigate? and can you navigate to an already open form (without creating a new instance) and without using .goforward?
I've already gave you a hint (to debug constructors). Yes, if you are using NavigationService.Navigate(new Uri("/MainPage.xaml", UriKind.Relative)); or NavigationService.Source = new Uri("/MainPage.xaml", UriKind.Relative); it creates a new page.
This implementation have a sense if you start thinking in web-based terms (what is Silverlight built for!)
BTW, I don't understand your requirements. Why do you need this? What's wrong with GoBack() or GoForward()? Also, have you tried other WP7 layouts (Panorama etc.)?
Try to follow the MS "Metro UI" recommendations and many questions will disappear shortly...
GoFoward won't work:
http://msdn.microsoft.com/en-us/lib...ation.navigationservice.goforward(VS.92).aspx
It seems like your problem isn't navigation, (because you should be using GoBack) but that the previous page that you GoBack to isn't how you wanted it.
If this is the case, you should add some sort of way to tell an event occurred. For example, if you did (note this is really rough)
Page2.xaml.cs
{
...
public static bool VisitedPage = false;
...
}
and when you visit the page, simply set it to true.
Then, when you GoBack, in OnNavigatedTo
protected override void OnNavigatedTo(NavigationEventArgs e)
{
if (Page2.VisitedPage)
{
//process why you needed to go tot he page
//clear the page for a fresh run
}
}
Have you tried unselecting that listbox item when you goback?
I had this same issue not too long ago where since it was the same instance of the page the listbox item was still selected when I returned and since the event on the listbox is "selectedchanged" it doesnt change when you select the same 1.
Hi,
First, a disclaimer.
I am a Java and xposed noob. My background is in embedded C development so I can get by with some simple Java code and thanks to the great tutorials online I have been able to put together an xposed module but I'm struggling with a problem that is beyond my abilities now and am reaching out to the community for help.
Next, the background.
I have an Android head unit in my car. There is an app that provides me with CarPlay functionality but none of the controls on the steering wheel work with the app. When I analysed the code I found that they handle all of their button inputs using proprietary methods that do not inject an event into any input streams. I wrote an xposed module to hook the button press methods and then inject a proper input into one of the event streams.
Initially I tried to use the command line 'input' command to do this but since it is a Java app and takes about 1s to load it was too slow. My only other option was to create a virtual device on an input stream that I could then use to inject keypresses through the hooked method. To create a virtual device I needed to write C code that my xposed module would be able to access through the JNI. Long story short, after some pain I was able to get the native library integrated into the project and compiling using the NDK.
Finally, the problem.
When I was using the module without the native library it worked but just with a large delay because of the time it takes to load the 'input' java app. I was able to see logs from the module in the logcat as I hooked the method and as I went through the various actions within the hook.
As soon as I introduce the native library though the entire xposed module just stops running completely. I do not get any logs from the module even though I have installed, activated and rebooted. It shows up in the xposed installer but it just does nothing. The funny thing is that this happens even if I make no reference whatsoever to any native functions within the library. All I need to do to kill the module is to build it with the System.loadlibrary line in the Main.java uncommented. As soon as I comment that piece of code out the module starts to hook the function and output logs again. Below is the code from the Main.Java that I am referring to. I am happy to make any manifest, C and gradle files available too. Looking for any ideas as to why the module dies completely as soon as I include this...
Code:
package projects.labs.spike.zlink_xposed_swc;
import de.robv.android.xposed.XposedBridge;
import static de.robv.android.xposed.XposedHelpers.findAndHookMethod;
import de.robv.android.xposed.IXposedHookLoadPackage;
import de.robv.android.xposed.IXposedHookZygoteInit;
import de.robv.android.xposed.XSharedPreferences;
import de.robv.android.xposed.XC_MethodHook;
import de.robv.android.xposed.callbacks.XC_LoadPackage;
import de.robv.android.xposed.XposedHelpers;
import android.app.AndroidAppHelper;
import android.content.Intent;
import android.os.Bundle;
import android.content.Context;
/* shellExec and rootExec methods */
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ByteArrayOutputStream;
import android.view.KeyEvent;
import android.media.AudioManager;
public class Main implements IXposedHookLoadPackage {
public static final String TAG = "ZLINK_XPOSED ";
public static void log(String message) {
XposedBridge.log("[" + TAG + "] " + message);
}
//public native int CreateVirtualDevice();
//public native int SendPrev();
@Override
public void handleLoadPackage(final XC_LoadPackage.LoadPackageParam lpparam) throws Throwable {
log("handleLoadPackage: Loaded app: " + lpparam.packageName);
if (lpparam.packageName.equals("com.syu.ms")) {
findAndHookMethod("module.main.HandlerMain", lpparam.classLoader, "mcuKeyRollLeft", new XC_MethodHook() {
@Override
protected void afterHookedMethod(XC_MethodHook.MethodHookParam param) throws Throwable {
// previous
log("PREVKEYHIT");
//rootExec("input keyevent 88");
log("EVENTSENT");
//Below was trying to use media keys which zlink never responded to...
/* Context context = (Context) AndroidAppHelper.currentApplication();
AudioManager mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
KeyEvent event = new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MEDIA_PREVIOUS);
mAudioManager.dispatchMediaKeyEvent(event);
KeyEvent event2 = new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_MEDIA_PREVIOUS);
mAudioManager.dispatchMediaKeyEvent(event2);*/
//Below is the failed broadcast intent method...
/*Context mcontext = (Context) AndroidAppHelper.currentApplication();
Intent i = new Intent("com.android.music.musicservicecommand");
i.putExtra("command", "pause");
mcontext.sendBroadcast(i);*/
}
});
}
}
public static String rootExec(String... strings) {
String res = "";
DataOutputStream outputStream = null;
InputStream response = null;
try {
Process su = Runtime.getRuntime().exec("su");
outputStream = new DataOutputStream(su.getOutputStream());
response = su.getInputStream();
for (String s : strings) {
s = s.trim();
outputStream.writeBytes(s + "\n");
outputStream.flush();
}
outputStream.writeBytes("exit\n");
outputStream.flush();
try {
su.waitFor();
} catch (InterruptedException e) {
e.printStackTrace();
}
res = readFully(response);
} catch (IOException e) {
e.printStackTrace();
} finally {
Closer.closeSilently(outputStream, response);
}
return res;
}
public static String readFully(InputStream is) throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int length = 0;
while ((length = is.read(buffer)) != -1) {
baos.write(buffer, 0, length);
}
return baos.toString("UTF-8");
}
static {
System.loadLibrary("native-lib");
}
}
Have you tried capturing an ADB log _during the bootup_?
Xposed bugs in general are unfortunaley hard to identify and harder to fix, since the underlying code isn't well understood and/or maintained by many people.
Namnodorel said:
Have you tried capturing an ADB log _during the bootup_?
Xposed bugs in general are unfortunaley hard to identify and harder to fix, since the underlying code isn't well understood and/or maintained by many people.
Click to expand...
Click to collapse
Thanks for the response. I think that I have it figured out. The System.loadlibrary method looks for the native library within a path relative to the process that it is running within. The code within the apk ultimately does not run within that apk process, it runs within the xposed process. You therefore need to give xposed an absolute path to the library using the system.load method instead. Going to do some fiddling tonight and see if it works.
looxonline said:
Thanks for the response. I think that I have it figured out. The System.loadlibrary method looks for the native library within a path relative to the process that it is running within. The code within the apk ultimately does not run within that apk process, it runs within the xposed process. You therefore need to give xposed an absolute path to the library using the system.load method instead. Going to do some fiddling tonight and see if it works.
Click to expand...
Click to collapse
What about an alternative without using library we discussed earlier? Are you planning to test this as well?
If so, please let me know how it went.
C3C076 said:
What about an alternative without using library we discussed earlier? Are you planning to test this as well?
If so, please let me know how it went.
Click to expand...
Click to collapse
I didn't try it yet for two reasons.
1.) From the research I have done it seems as if my app would need the system INJECT_EVENTS permission in order to send keypress events outside of its own process. I cannot get this permission unless I sign my apk with the system cert that the ROM is compiled with. Maybe the method that you are using in the suggestion does not need this cert? Have you personally used this to inject key events across processes? I did see that you are getting the context of the system input service so maybe that solves this issue if the request appears to come from that PID...???
2.) The unit that I am working with has only two input devices and none of them have the keycodes I require. Does your method use a completely virtual device that is created on the fly? If so then it could work well without the need for me to create an HID input device.
I mostly was just on a role with the method that I was trying and I didn't want to turn back since I was so far down the road. I'm sure you understand how addictive certain challenges become and its quite fun to try to get them working even if they may not be the most optimal way.
In any case I managed to get the native library working last night and can successfully convince Android that I have a real HID keyboard plugged in and then send key events through that keyboard. Still not done though as there are a few hiccups that need solving. May still try your original suggestion. Thanks
looxonline said:
I didn't try it yet for two reasons.
1.) From the research I have done it seems as if my app would need the system INJECT_EVENTS permission in order to send keypress events outside of its own process. I cannot get this permission unless I sign my apk with the system cert that the ROM is compiled with. Maybe the method that you are using in the suggestion does not need this cert? Have you personally used this to inject key events across processes? I did see that you are getting the context of the system input service so maybe that solves this issue if the request appears to come from that PID...???
2.) The unit that I am working with has only two input devices and none of them have the keycodes I require. Does your method use a completely virtual device that is created on the fly? If so then it could work well without the need for me to create an HID input device.
I mostly was just on a role with the method that I was trying and I didn't want to turn back since I was so far down the road. I'm sure you understand how addictive certain challenges become and its quite fun to try to get them working even if they may not be the most optimal way.
In any case I managed to get the native library working last night and can successfully convince Android that I have a real HID keyboard plugged in and then send key events through that keyboard. Still not done though as there are a few hiccups that need solving. May still try your original suggestion. Thanks
Click to expand...
Click to collapse
I see.
1) Depends on in what process (package) your hooks are running within because permissions of this process apply of course, not the permissions you define in your module's manifest.
I am using key injecting method within "android" process (package) which means it works without me needing to worry about INJECT_EVENTS permission as "android" process already has it.
By the way, missing permissions are not of a big issue when developing with xposed as you can really do some magic with it.
E.g. I was adding some functionality to SystemUI that required some additional permissions that SystemUI typically lacks. So my module takes care of it.
https://github.com/GravityBox/Gravi...eco/pie/gravitybox/PermissionGranter.java#L75
C3C076 said:
I see.
1) Depends on in what process (package) your hooks are running within because permissions of this process apply of course, not the permissions you define in your module's manifest.
I am using key injecting method within "android" process (package) which means it works without me needing to worry about INJECT_EVENTS permission as "android" process already has it.
By the way, missing permissions are not of a big issue when developing with xposed as you can really do some magic with it.
E.g. I was adding some functionality to SystemUI that required some additional permissions that SystemUI typically lacks. So my module takes care of it.
https://github.com/GravityBox/Gravi...eco/pie/gravitybox/PermissionGranter.java#L75
Click to expand...
Click to collapse
Wow! I had no idea that you can use an xposed helper function to grant permissions to whatever process you are hooked within like that. That is VERY cool. Thanks so much for sharing