editcontrol

问题 I am unable to figure out how to properly use the EM_SETHANDLE mechanism to set the text for an edit control. Get and Set window text will be too slow for my application. From the documentation I understand that the allocated buffer will be sued by the control and it works partially for me. When the text is entered in the control, it is seen in the buffer but when the buffer is updated using memcpy etc (no bug in the code), the updated text won't show properly. I even tried EM_SETHANDLE

问题 On some forms I have dbEdits that sometimes aren't wide enough to show all the text their fields may contain. For them I have the following code: procedure Tgm12edLots.dbeLotNameMouseEnter(Sender: TObject); begin with dbeLotName do begin ShowHint := True; Hint := Text; end; end; I'd like to avoid the hint showing if all the text is visible, but I don't how to test for that condition. Thanks for any tips/suggestions! 回答1: I think this should work... function CanShowAllText(Edit: TDBEdit)

问题 On some forms I have dbEdits that sometimes aren't wide enough to show all the text their fields may contain. For them I have the following code: procedure Tgm12edLots.dbeLotNameMouseEnter(Sender: TObject); begin with dbeLotName do begin ShowHint := True; Hint := Text; end; end; I'd like to avoid the hint showing if all the text is visible, but I don't how to test for that condition. Thanks for any tips/suggestions! 回答1: I think this should work... function CanShowAllText(Edit: TDBEdit)

问题 https://en.wikipedia.org/wiki/International_Bank_Account_Number#Practicalities The IBAN should not contain spaces when transmitted electronically: when printed it is expressed in groups of four characters separated by a single space, the last group being of variable length as shown in the example below: A typical IBAN looks like this: GR16 0110 1250 0000 0001 2300 695 (taken from the above link). I want to make it easier for users to enter IBAN numbers. Currently I use a TDBEdit to display

问题 How can I disable those 3 standard cut/copy/paste commands in the context menu of the native Windows OS edit control? I also need to disable the equivalent clipboard-related commands like CTRL+C/CTRL+V. Is there a special edit control style or anything else we can use to disable all copy/paste operations with one easy setting? 回答1: Typically, when a control displays a popup menu, a WM_INITPOPUPMENU message is generated which " allows an application to modify the menu before it is displayed,

问题 I am trying to catch ENTER and ESC key press in singleline edit control. When user presses ENTER or ESC I want to take away keyboard focus from edit control and set it to listview control. Listview control is edit control's sibling. My goal is to write single subclass procedure that can be used for subclassing edit controls in both main window and dialog box. I have found this MSDN article that I found useful because of its second solution. Below is my adaptation of the code. // subclass

问题 INTRODUCTION AND RELEVANT INFORMATION: I have an edit control that needs to accept only signed decimal numbers ( something like -12.35 ). I have decided to implement this via subclassing . The WM_CHAR handler seems to works well, and I need to handle several other messages to completely protect user from entering invalid text. One such message is WM_PASTE . So far I was able to properly get the text from the clipboard and to discard or pass the message depending if the copied string is indeed

问题 I have subclassed edit control to accept only floating numbers. I would like to pop a tooltip when user makes an invalid input. The behavior I target is like the one edit control with ES_NUMBER has : So far I was able to implement tracking tooltip and display it when user makes invalid input. However, the tooltip is misplaced. I have tried to use ScreenToClient and ClientToScreen to fix this but have failed. Here are the instructions for creating SCCE : 1) Create default Win32 project in

问题 I have an application that compiles ok (mingw) and runs ok, however the edit control that is created has scroll bars but the vertical scroll bar doesn't do anything. The same executable works fine on WinXP. Also, the edit control has both vertical and horizontal scroll bars, the horizontal works just fine, but vertical does not. The vertical scroll bar is visible and clickable, but nothing happens... Following code is used when creating the edit control: HWND hwndEdit = CreateWindow(TEXT(

问题 I am trying to find a handle for an Edit control in a window in another application. Basically what I have done so far is the following: I already have the handle to the window in which the combo box of the edit control and edit control are in. I am using the EnumChildWindows() function to look through all the child windows of the parent window until I hit the Edit control: HWND hWnd;//handle to parent window... I already have this HWND handleEditControl;//I am looking for this