I am developing a custom keyboard using xamarin form and I need to create KeyEvent on my custom renderer for the the Ctrl keys, however I could not find any documentation on how to do it.
I have tried different combination of constructor with the KeyEvent class with no success. For example:
webView.DispatchKeyEvent(new KeyEvent(0, 0, KeyEventActions.Down, KeyEvent.KeyCodeFromString(digit), 0, MetaKeyStates .ShiftLeftOn & MetaKeyStates.CtrlLeftOn));
webView.DispatchKeyEvent(new KeyEvent(0, 0, KeyEventActions.Up, KeyEvent.KeyCodeFromString(digit), 0, MetaKeyStates.ShiftLeftOn & MetaKeyStates.CtrlLeftOn));
I also tried the following for lowercase with no success
webView.DispatchKeyEvent(new KeyEvent(0, 0, KeyEventActions.Down, KeyEvent.KeyCodeFromString(digit), 0, MetaKeyStates.CtrlLeftOn));
webView.DispatchKeyEvent(new KeyEvent(0, 0, KeyEventActions.Up, KeyEvent.KeyCodeFromString(digit), 0, MetaKeyStates.CtrlLeftOn));
This does not provide the control character I am expecting like Ctrl+C or Ctrl+c. I am only getting the event for the actual character like c or C but not the control. I am using this code for a WebView and verifying the the output with JavaScript. The java script reports correctly the character pressed but not the Ctrl, even when checking the ctrlKey property of the javaScript event the flag is set to false.
Related
I'm trying to create a dynamic dialog, which can be made RTL depending on the language. But I have the following issue: whenever I change the RTL style of the combo box, the text comes up reversed. I tried using functions such as InvalidateRect, RedrawWindow, etc., but couldn't make it work correctly.
Relevant code (WinAPI with WTL):
CComboBox combo = hWndCtl;
if(combo.GetCurSel() == 0)
combo.ModifyStyleEx(WS_EX_LAYOUTRTL, 0);
else
combo.ModifyStyleEx(0, WS_EX_LAYOUTRTL);
A demo project: here.
A demonstration of the issue:
It seems you are responding to CBN_SELCHANGE notification. This is notification is sent after combobox sets the text in its editbox.
You should respond to CBN_SELENDOK instead. CBN_SELENDOK is sent before CBN_SELCHANGE, this gives you time to modify the style before combobox sets the text.
switch (HIWORD(wParam))
{
case CBN_SELENDOK:// CBN_SELCHANGE:
if (SendMessage(hComboBox, CB_GETCURSEL, 0, 0) == 0)
ModifyStyleEx(hComboBox, WS_EX_LAYOUTRTL, 0);
else
ModifyStyleEx(hComboBox, 0, WS_EX_LAYOUTRTL);
break;
default:break;
}
Edit: Windows 10 has fade in/out effect. If you change the combo selection with keyboard, while the color is fading, the text is still goes backward.
ComboBox has an edit control which might be causing this problem. It's better to use WS_EX_RIGHT | WS_EX_RTLREADING instead of WS_EX_LAYOUTRTL. This will also work with CBN_SELCHANGE.
case CBN_SELENDOK: //(or CBN_SELCHANGE)
if (SendMessage(hComboBox, CB_GETCURSEL, 0, 0) == 0)
ModifyStyleEx(hComboBox, WS_EX_RIGHT | WS_EX_RTLREADING, 0);
else
ModifyStyleEx(hComboBox, 0, WS_EX_RIGHT | WS_EX_RTLREADING);
break;
I'm trying to use Chrome's developer console to simulate N times (e.g. 10000) javascript's keypress with keycode = 50 (key: "2" in keyboard), not within a single elements, but at page level.
I need to achieve this result without modifying the source code, to test a web application behavior under multiple user interactions.
I found different answers on SO but most of them are based on jQuery.
I tried to use:
var evt = document.createEvent("KeyboardEvent");
>> undefined
evt.initKeyEvent ("keypress", true, true, window,0, 0, 0, 0, 50, 50);
>> undefined is not a function
followed by event dispatch but it doesn't work.
Also I don't know how shall insert a for cycle from Chrome's console.
I have such menu situation:
int menu_create(Ihandle *menu)
{
hamburger = IupItem("&Hamburger", "hamburger");
IupSetAttributes(hamburger, "AUTOTOGGLE=YES, RADIO=YES");
char* ce = "Ćev&apčići";
cevapcici = IupItem(utf8_to_cp1250(ce), "cevapcici");
IupSetAttributes(cevapcici, "AUTOTOGGLE=YES, RADIO=YES");
exit = IupItem("Exit\tAlt+F4", "exit");
img4 = IupLoadImage("icons\\delete_16x16.ico");
IupSetAttributeHandle(exit, "TITLEIMAGE", img4);
menu = IupMenu(
IupSubmenu("File",
IupMenu(
hamburger,
cevapcici,
IupSeparator(),
IupItem("Carro&t", "carrot"),
IupSeparator(),
exit,
NULL)),
NULL);
IupSetFunction("exit", (Icallback)mnu_exit);
... etc...
IupSetHandle("menu", menu);
return IUP_DEFAULT;
}
How to get "radio toggle group" functionality with items hamburger and cevapcici so first turns off a second checkmark and opposite. This is my try but it don't work.
2) I try webbrowser example from IUP suite on my windows 7. Problem is that bad black flickering appear's during resize (increase). Also, background of webbrowser flicker black during showing.
I try a same example on Ubuntu and there flickering appear's too but it is not so much visible since background is there white.
Is here any way to get rid of those flickering or if not to get white background of webbrowser window on windows?
3) Since webbrowser is ole object (on windows) is it possible to use say "print preview" or "zoom" function by reference from IUP handle or at any other way like we used to do from MS programming tools?
wbInstance.ExecWB(Exec.OLECMDID_OPTICAL_ZOOM, ExecOpt.OLECMDEXECOPT_DONTPROMPTUSER, 150, DBNull.Value)
4) How can I get key_up event fired from IupTree?
5) Interesting situation with IupTabs:
frame3 = IupHbox(mat, val, NULL);
vboxt1 = IupVbox(frame3, NULL);
vboxt2 = IupVbox(frame3, NULL);
IupSetAttribute(vboxt1, "TABTITLE", "First documents... ");
IupSetAttribute(vboxt2, "TABTITLE", "Second documents... ");
tabs = IupTabs(vboxt1, vboxt2, NULL);
hbox1 = IupHbox(tabs, IupVbox(frame, tree, frame2, NULL), NULL);
dlg = IupDialog(hbox1);
When I set frame3 which should be a same for both tabs my GUI frozes.
However, I have to got same "mat" (IupMatrix) in both tabs because by changing tabs other data load in matrix but similar enough to use same matrix and related functions.
What to do here?
1) The RADIO attribute belongs to the IupMenu, not to the IupItem. This also means that all the IupItems inside that menu will be part of the radio.
A workaround would be to manually unset the other toggle inside the action callback.
2) That flicker is not caused by IUP. Don't know why the native controls are doing it.
3) Yes, but you will have to program that using the OLE API. If you take a look at the IupOleControl and IupWebBrower source code and send me the code to do it, I will be happy to add it to IUP.
4) You don't. Use the K_ANY callbacks.
5) You can not reuse a control in different places in any dialog. So you must have two different frames, with two different matrices. What you can do is to encapsulate your matrix, so the same function will create a matrix with the same attributes and callbacks any time you want one.
I am relatively new to the Win32/Windows API (non-MFC), and am trying to change the text colour of a static text control. It is already drawn to the screen in black, but I want to change it to another colour using the Windows Colour Chooser dialog, which is opened on clicking a button. Is this possible?
For the button, the WM_COMMAND message is handled on clicking. So far, I have written:
CHOOSECOLOR ccColour;
ccColour.lStructSize = sizeof(ccColour);
ccColour.hwndOwner = hWnd;
ccColour.rgbResult = crLabelTextColour;
ccColour.Flags = CC_FULLOPEN | CC_RGBINIT;
if (ChooseColor(&ccColour) == TRUE)
{
// crLabelTextColour is a COLORREF global variable assigned on loading the program
crLabelTextColour = ccColour.rgbResult;
}
This code, however, fails with an unhandled exception at the if statement, and I'm not sure why! Other examples seem to write code like this.
ChooseColor() crashes because you are not initializing the CHOOSECOLOR structure completely. You are only setting 3 fields, the rest will contain garbage. You'll need to zero-initialize everything, simple to do:
CHOOSECOLOR ccColour = {0};
I was wondering if there is a way to add (programatically, of course) an icon/button/whatever besides plain text to a window (Microsoft Windows window...)'s title bar or next to where the minimize/maximize/close buttons are. I could draw it myself and create an illusion it is a part of the window, but I wonder if in the user32 api there is such a method.
So far, I found a way to disable the minimize/maximize/close buttons but not a way to add a custom one to them. It seems strange to me.
Here is what I am trying to achieve:
I have been wondering how it is done here, since drawing a button for every window using gdi/gdi+ and then detecting if it is overlapped by another window and then displaying only the non-overlapped part seems to me like an unlikely solution. Probably the button has been registered in the window class so that every window has this button. Any pointers what to do?
In addition, how do I create a button at all, assuming I DON'T have Unicode enabled. Then in the following piece of code:
HWND hwndCommandLink = CreateWindow(
L"BUTTON", // Class; Unicode assumed.
L"", // Text will be defined later.
WS_TABSTOP | WS_VISIBLE | WS_CHILD | BS_COMMANDLINK, // Styles.
10, // x position.
10, // y position.
100, // Button width.
100, // Button height.
hDlg, // Parent window.
NULL, // No menu.
(HINSTANCE)GetWindowLong(hDlg, GWL_HINSTANCE),
NULL); // Pointer not needed.
SendMessage(clHwnd, WM_SETTEXT, 0, (LPARAM)L"Command link");
SendMessage(clHwnd, BCM_SETNOTE, 0, (LPARAM)L"with note");
I have to substitute all the nice Windows constants with their long equivalent....However, when I search for them, all i get is this:
http://msdn.microsoft.com/en-us/library/bb775951(v=VS.85).aspx
Any pointers?