I'm a newbie in windows programming and am continuously running into different kinds of problems, most of which I have been able to solve by myself.
My problem at hand is the caret (or cursor) shown in text areas. The thing that indicates where you are typing your text? Well it is shown, at least, but it doesn't blink like it should.
I have an EDIT box created in WM_CREATE like so:
case WM_CREATE:
{
if(!logged) {
HWND userField = CreateWindow(
"EDIT", // Predefined class; Unicode assumed
NULL, // Button text
WS_VISIBLE | WS_CHILD | WS_BORDER | ES_LEFT, // Styles
C_WIDTH/2 - 80, // x position
C_HEIGHT - 240, // y position
160, // Button width
25, // Button height
hwnd, // Parent window
NULL, // No menu.
(HINSTANCE)GetWindowLong(hwnd, GWL_HINSTANCE),
NULL); // Pointer not needed.
// initialize NONCLIENTMETRICS structure
NONCLIENTMETRICS ncm;
ncm.cbSize = sizeof(ncm);
// obtain non-client metrics
SystemParametersInfo(SPI_GETNONCLIENTMETRICS, sizeof(ncm), &ncm, 0);
// create the new font
HFONT hNewFont = CreateFontIndirect(&ncm.lfMessageFont);
// set the new font
SendMessage(userField, WM_SETFONT, (WPARAM)hNewFont, 0);
}
}
break;
That is all code concerning the edit box. I'm sorry if I'm not being clear enough or my supply of code is lacking; I'm unsure of what parts of code is relevant here and what are irrelevant. I don't think I should paste my whole code here, either.
The problem, again, is that the caret in the textbox (userField) does not blink.
Please ask for more details if you need them.
Using your code, I didn't get a flashing caret. But then i added:
SetFocus( userField );
and voilà, a flashing caret :-)
This may not be the problem the OP was experiencing, but I was experiencing the same symptom, and I'm posting my solution here in case someone else experiences this problem...
In short, if you subclass an edit control, and handle the WM_SETFOCUS event, you need to call DefSubclassProc() or your caret won't show up. Presumably, you can call ShowCaret() yourself, but you're probably safer just calling DefSubclassProc() in case there's other processing that needs to happen.
After playing around - making my code a bit tidier and stuff - I accidentally solved this on my own
I changed
HWND userField = CreateWindow(
"EDIT", // Predefined class; Unicode assumed
NULL, // Button text
WS_VISIBLE | WS_CHILD | WS_BORDER | ES_LEFT, // Styles
C_WIDTH/2 - 80, // x position
C_HEIGHT - 240, // y position
160, // Button width
25, // Button height
hwnd, // Parent window
NULL, // No menu.
(HINSTANCE)GetWindowLong(hwnd, GWL_HINSTANCE),
NULL); // Pointer not needed.
Into
HWND userField = CreateWindow("EDIT", NULL, WS_VISIBLE | WS_CHILD | WS_BORDER | ES_LEFT,
C_WIDTH/2 - 80, C_HEIGHT - 240, 160, 25, hwnd, NULL, g_hInstance, NULL);
The only difference there is the hInstance: in the first code it was apparently wrong. I changed it into my global reference of hInstance.
Related
According to some sources, a tab child dialog should be the child of the actual main dialog window, not the tab control itself. I think some of the docs suggest the opposite, namely this function example:
// Creates a child window (a static control) to occupy the tab control's
// display area.
// Returns the handle to the static control.
// hwndTab - handle of the tab control.
//
HWND DoCreateDisplayWindow(HWND hwndTab)
{
HWND hwndStatic = CreateWindow(WC_STATIC, L"",
WS_CHILD | WS_VISIBLE | WS_BORDER,
100, 100, 100, 100, // Position and dimensions; example only.
hwndTab, NULL, g_hInst, // g_hInst is the global instance handle
NULL);
return hwndStatic;
}
So is there a definitive view on this? I checked Petzold, by the way, but didn't locate anything on the subject. Thanks for any help.
Hello I want to know if it is possible to change the font of an edit control for some lines only without affecting the remaining:
In my Edit control I have a text but I want some headlines and titles in bigger font and bold while the other lines are with smaller font.
I tried SendMessage(hEdit, WM_SETFONT, (WPARAM)hfont, MAKELPARAM(0, true));
But it sets the whole text in the passed in font.
I thought some messing up with SelectObject(hDcEdit, hFont); But I don't know if it is correct and how.
A standard Edit Control (think, Notepad) does not support what you are looking for. It only supports one Font for the entire text.
What you are looking for is a RichEdit Control instead (think, Wordpad), and in particular its EM_SETCHARFORMAT message, which can be used to apply different formatting (including fonts, colors, etc) to different sections of text.
This is not working with the default Editcontrol, but you can use a Richeditcontrol
#include <Windows.h>
#include <CommCtrl.h>
HINSTANCE relib = LoadLibrary("riched32.dll");
if (relib == NULL) {
MessageBox(NULL, "couldn't load richedit32.dll", "", MB_ICONEXCLAMATION);
hEdit = CreateWindow(RICHEDIT_CLASS, "", WS_VISIBLE | WS_CHILD | ES_MULTILINE |
ES_AUTOHSCROLL | ES_AUTOVSCROLL | WS_VSCROLL | WS_HSCROLL, 0, 0, 200, 200, hWnd, NULL,
NULL, NULL);
Now to set the font to your Richeditcontrol use:
CHARFORMAT2 cf;
memset(&cf, 0, sizeof cf);
cf.cbSize = sizeof cf;
cf.dwMask = CFM_FACE;
wsprintf(cf.szFaceName, "Arial"); //Here you can set the fontname you wont (C:/Windows/Fonts)
SendMessage(hEdit, EM_SETCHARFORMAT, SCF_SELECTION, (LPARAM)&cf);
I've been looking for a way to make a picture a button in c++ for a few hours now.. I've found stuff on using bitmaps, what what i am currently using to display the image is GDI+, because i want to use jpg/png files.
This is how i created my Image with gdiplus:
void Example_DrawImage(HDC hdc) {
Graphics graphics(hdc);
image = Image::FromFile(L"Path:/To/Image");
myBitmap = dynamic_cast<Bitmap*>(image);
Pen pen(Color(0, 0, 0, 0), 2);
graphics.DrawImage(image, 10, 10);
}
I converted that to a bitmap with:
myBitmap = dynamic_cast<Bitmap*>(image);
Then, in WM_CREATE I created a button which it's standard style is a Windows XP Button:
button = CreateWindow(TEXT("button"), TEXT("Hello"),
WS_VISIBLE | WS_CHILD | BS_BITMAP,
10, 10, /* x & y*/ 80, 25, /*width & height*/
hwnd, (HMENU) 1, hInstance, NULL
);
button is globally defined as HWND button;
All I want is to have a button that is a jpg picture. I tried doing it manually by seeing if a mouse click was inside a certain area, but I could not find a way to find the position of the Image.
I have the following code which passes a window handler form OpenCV window to win32 handler, therefore I can show the grabbed images from camera to the screen and the images will show as a child window of my main API.
but the problem is that when I want to add a tooldbar to my program, the image window handler comes at the top of the toolbar. how can I sort this out?
//create a window and set the handler from openCV to win32
cv::namedWindow("test",cv::WINDOW_AUTOSIZE);
hWnd2 = (HWND) cvGetWindowHandle("test");
hParent = ::GetParent(hWnd2);
::SetParent(hWnd2, hWnd);
::ShowWindow(hParent, SW_HIDE);
_liveCapturing=true;
lastPicNr = 0;
SetWindowTextW(hStatus, L"Live Capturing ... ");
if(FullScreen()){
::ShowWindow(hWnd, SW_MAXIMIZE);
}
code for the toolbar :
HWND CreateToolbar(HWND hwnd){
HWND hTbar = CreateWindowEx(0, TOOLBARCLASSNAME, NULL, WS_CHILD | WS_VISIBLE | CCS_TOP , 0, 0, 0, 0, hwnd, (HMENU)12, GetModuleHandle(NULL), NULL);
SendMessage(hTbar, TB_BUTTONSTRUCTSIZE, (WPARAM)sizeof(TBBUTTON), 0);
TBBUTTON tbb[3];
TBADDBITMAP tbab;
tbab.hInst = HINST_COMMCTRL;
tbab.nID = IDB_STD_SMALL_COLOR;
SendMessage(hTbar, TB_ADDBITMAP, 0, (LPARAM)&tbab);
return hTbar;
}
Probably you have found the solution a long time ago, but i want to post my anwers in case other users need it.
You can simply add the OpenCV window with the same code you have to a child window in your window (which you set it position in advance). For example you can add it to a static text window (label) ...
If you want to move the OpenCV window, call SetWindowPos() with the desired coordinates.
SetWindowPos(hWnd2, 0, 0, 30, 0, 0, SWP_NOSIZE | SWP_NOZORDER);
I'm currently in the second stage of development for a data management project I'm involved with; at the moment, we're in the stage of revamping the GUI (we're going for an office 2007-themed GUI).
At the moment I've only got experience with Dialog-based MFC projects, from which this migrates from, where we drew controls onto the dialog, then got handles to them using the GetDlgItem command, using the IDs of the controls.
Now, we're using SDI, instead of a dialog-based project, and thus, it's required to procedurally create the controls. I've had no problems creating and showing controls in the ChildView area; however, the text is very low quality and aliased. I googled the problem, but was unable to find anything particularly pertinent to the problem, indeed, the only thing which bore any real relevance was using GDI+ to draw anti-aliased text, which is fine for simple text, but I need MFC controls such as CEdit and CListBox.
Here is an image to help illustrate my problem:
I am creating both the static GDI+ text and the MFC control in the OnPaint function, as follows:
void CChildView::OnPaint()
{
CPaintDC dc(this); // device context for painting
Gdiplus::Graphics graphics(dc);
static Gdiplus::FontFamily* fontFamily = new Gdiplus::FontFamily( _T("Segoe UI") );
static Gdiplus::Font* font = new Gdiplus::Font( fontFamily, 12, Gdiplus::FontStyle::FontStyleRegular, Gdiplus::Unit::UnitPixel );
static Gdiplus::SolidBrush* solidBrush = new Gdiplus::SolidBrush( Gdiplus::Color::RoyalBlue );
Gdiplus::PointF point( 10, 10 );
graphics.SetTextRenderingHint( Gdiplus::TextRenderingHint::TextRenderingHintAntiAlias );
graphics.DrawString( _T("Hello, World!"), 13, font, point, solidBrush );
// TODO: Add your message handler code here
CEdit* pEditBox = new CEdit();
pEditBox->CreateEx( WS_EX_CLIENTEDGE, _T("EDIT"), _T("Why is this text so poor?"), WS_BORDER | WS_CHILD | WS_VISIBLE, CRect(100, 100, 300, 200), this, UINT_MAX-9 );
// Do not call CWnd::OnPaint() for painting messages
}
At the moment, I am wondering if it necessary to derive each of the controls and change their rendering methods to use GDI+ antialiased text. Hopefully their is an easier way to resolve this problem.
I will be extremely grateful for any help/advice.
Thanks in advance!
EDIT: Just for reference, I used to following to resolve my problem:
CFont* pFont = new CFont();
pFont->CreatePointFont( 120, _T("Segoe UI") );
CEdit* pEditBox = new CEdit();
pEditBox->CreateEx( WS_EX_CLIENTEDGE, _T("EDIT"), _T("Test Edit"), WS_BORDER | WS_CHILD | WS_VISIBLE, CRect(100, 100, 300, 200), this, UINT_MAX-9 );
pEditBox->SetFont( pFont );
Alternatively, the following allows for the default font for the window to be used:
CEdit* pEditBox = new CEdit();
pEditBox->CreateEx( WS_EX_CLIENTEDGE, _T("EDIT"), _T("This text is no longer poor"), WS_BORDER | WS_TABSTOP | WS_CHILD | WS_VISIBLE, CRect(100, 100, 300, 200), this, UINT_MAX-9 );
if( ::IsWindow( pEditBox->GetSafeHwnd() ) )
{
::SendMessage( pEditBox->GetSafeHwnd(), WM_SETFONT, (WPARAM)(HFONT)GetStockObject(DEFAULT_GUI_FONT), FALSE );
}
Change the font used by the edit box, it's just the default one that looks so ugly.
If you want to get the "standard" font, see e.g. SystemParametersInfo with SPI_GETNONCLIENTMETRICS argument. Of course, you can use any other font if you want to.