How to use TabbedTextOut?
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LONG TabbedTextOut( HDC hDC, // handle to DC int X, // x-coord of start int Y, // y-coord of start LPCTSTR lpString, // character string int nCount, // number of characters int nTabPositions, // number of tabs in array CONST LPINT lpnTabStopPositions, // array of tab positions int nTabOrigin // start of tab expansion );I thought the number of tabs and the positions of tabs are determined by the "\t"s contained in lpString, but it does not turn out to be that simple. What is TabbedTextOut's behavior if the number of "\t"s does not equal nTabPositons? I simiply thought that TabbedTextOut would simply replace those "\t"s in lpString with blanks and the last three parameters did not make any sense. But the fact is the width positions of these "\t"s are depent on the last three parameters. How do these three parameters work? thank you. -
LONG TabbedTextOut( HDC hDC, // handle to DC int X, // x-coord of start int Y, // y-coord of start LPCTSTR lpString, // character string int nCount, // number of characters int nTabPositions, // number of tabs in array CONST LPINT lpnTabStopPositions, // array of tab positions int nTabOrigin // start of tab expansion );I thought the number of tabs and the positions of tabs are determined by the "\t"s contained in lpString, but it does not turn out to be that simple. What is TabbedTextOut's behavior if the number of "\t"s does not equal nTabPositons? I simiply thought that TabbedTextOut would simply replace those "\t"s in lpString with blanks and the last three parameters did not make any sense. But the fact is the width positions of these "\t"s are depent on the last three parameters. How do these three parameters work? thank you.crossie wrote:
I thought the number of tabs and the positions of tabs are determined by the "\t"s contained in lpString, but it does not turn out to be that simple.
True, the position of the tabs are determined by the values in the 7th argument to
TabbedTextOut()(e.g.,lpnTabStopPositions).crossie wrote:
How do these three parameters work?
Aren't the comments in your code snippet sufficient?
"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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crossie wrote:
I thought the number of tabs and the positions of tabs are determined by the "\t"s contained in lpString, but it does not turn out to be that simple.
True, the position of the tabs are determined by the values in the 7th argument to
TabbedTextOut()(e.g.,lpnTabStopPositions).crossie wrote:
How do these three parameters work?
Aren't the comments in your code snippet sufficient?
"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
I think by interpreting
lpString,TabbedTextOutitself can figure out how many "\t"s there are and thus the sixth parameternTabPositionsand the seventhlpnTabStopPositions, which together indicate the number and the positions of the tabs in lpString, do not make any sense. Besides, for example, when I callTabbedTextOutthe following way,int nTabStopPositions[] = { 105,110,120 }; TabbedTextOut(hdc, 100, 100, "aaa\tbbb\tccc", 11, 3, nTabStopPositions, 50);Supposing the map mode is MM_TEXT,and the char width is 5.TabbedTextOutwill draw the string where it is 100 pixels to the left and 100 pixels to the top of the client area, breaking the string with tabs at 100+3*5 and 100+6*5+8( a tab equals 8 blanks ). This is the way I think howTabbedTextOutworks, but it seems not working that way. Thus I don't understand how the last three parameters work. thank you