How Do I Detect Activity In a CEdit Control ?
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With the MFC class CEdit it is possible to receive notification messages for EN_UPDATE (for when the control is about to display altered text) and EN_CHANGE (for when the control has finished the display of altered text). Can anyone tell me how I can get notification to my dialog when the user is simply moving the cursor caret around inside the edit control and the text is not changing? I am using a single line version of the CEdit control. Your help would be greatly appreciated. If you need further information about what I am doing or in order to answer my question please leave a reply post here and I will answer back. Thanks Mike
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With the MFC class CEdit it is possible to receive notification messages for EN_UPDATE (for when the control is about to display altered text) and EN_CHANGE (for when the control has finished the display of altered text). Can anyone tell me how I can get notification to my dialog when the user is simply moving the cursor caret around inside the edit control and the text is not changing? I am using a single line version of the CEdit control. Your help would be greatly appreciated. If you need further information about what I am doing or in order to answer my question please leave a reply post here and I will answer back. Thanks Mike
You'd have to handle a variety of messages. WM_CHAR for characters; i believe this message is sent even if it's only a system key like a cursor key being pressed. Also, you'd want some mouse button messages... WM_LBUTTONDOWN or UP , for example. Because the user can reposition the cursor with a mouse click. Jon Sorry to dissapoint you all with my lack of a witty or poignant signature.
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You'd have to handle a variety of messages. WM_CHAR for characters; i believe this message is sent even if it's only a system key like a cursor key being pressed. Also, you'd want some mouse button messages... WM_LBUTTONDOWN or UP , for example. Because the user can reposition the cursor with a mouse click. Jon Sorry to dissapoint you all with my lack of a witty or poignant signature.
Thanks Jon. Your idea gave me the encouragement to do what needed to be done. I subclassed the CEdit control with a class that has message handlers for all of the appropriate messages that potentially change the caret position in the edit box. These include WM_KEYDOWN, WM_KEYUP, the three left moouse button messages, the three right mouse button messages and the reflected CHANGE message. It turns out that WM_CHAR is not so very useful as this does not get sent except for typed characters that will be modifying the edit box text contents. One sees no response there except for the likes of the arrow keys that actually move the caret around. Thanks again. Mike