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Implemented mouse click selection.

This commit is contained in:
Pietro Gagliardi 2014-12-13 13:56:31 -05:00
parent 516173916e
commit cecfa82994
4 changed files with 93 additions and 66 deletions
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133
wintable/new/coord.h
View File

@ -1,71 +1,5 @@
// 4 december 2014
struct rowcol {
intptr_t row;
intptr_t column;
};
static struct rowcol clientCoordToRowColumn(struct table *t, POINT pt)
{
RECT r;
struct rowcol rc;
intptr_t i;
RECT colrect;
// initial values for the PtInRect() check
rc.row = -1;
rc.column = -1;
if (GetClientRect(t->hwnd, &r) == 0)
panic("error getting Table client rect in clientCoordToRowColumn()");
r.top += t->headerHeight;
if (PtInRect(&r, p) == 0)
return rc;
// the row is easy
rc.row = (pt.y / rowht(t)) + t->yscrollpos;
// the column... not so much
// we scroll p.x, then subtract column widths until we cross the left edge of the control
p.x += t->hscrollpos;
rc.column = 0;
for (i = 0; i < t->nColumns; i++) {
// TODO error check
SendMessage(t->header, HDM_GETITEMRECT, (WPARAM) i, (LPARAM) (&colrect));
p.x -= colrect.right - colrect.left;
// use <, not <=, here:
// assume r.left and t->hscrollpos == 0;
// given the first column is 100 wide,
// p.x == 0 (first pixel of col 0) -> p.x - 100 == -100 < 0 -> break
// p.x == 99 (last pixel of col 0) -> p.x - 100 == -1 < 0 -> break
// p.x == 100 (first pixel of col 1) -> p.x - 100 == 0 >= 0 -> next column
if (p.x < r.left)
break;
rc.column++;
}
// TODO what happens if the break was never taken?
return rc;
}
// same as client coordinates, but stored in a lParam (like the various mouse messages provide)
static struct rowcol lParamToRowColumn(struct table *t, LPARAM lParam)
{
POINT pt;
pt.x = GET_X_LPARAM(lParam);
pt.y = GET_Y_LPARAM(lParam);
return clientCoordToRowColumn(t, pt);
}
// returns TRUE if the row is visible and thus has client coordinates; FALSE otherwise
static BOOL rowColumnToClientCoord(struct table *t, struct rowcol rc, struct POINT *pt)
{
// TODO
}
// TODO idealCoordToRowColumn/rowColumnToIdealCoord?
// TODO find a better place for this
static LONG rowHeight(struct table *t, HDC dc, BOOL select)
{
@ -93,3 +27,70 @@ static LONG rowHeight(struct table *t, HDC dc, BOOL select)
}
#define rowht(t) rowHeight(t, NULL, TRUE)
struct rowcol {
intptr_t row;
intptr_t column;
};
static struct rowcol clientCoordToRowColumn(struct table *t, POINT pt)
{
RECT r;
struct rowcol rc;
intptr_t i;
RECT colrect;
// initial values for the PtInRect() check
rc.row = -1;
rc.column = -1;
if (GetClientRect(t->hwnd, &r) == 0)
panic("error getting Table client rect in clientCoordToRowColumn()");
r.top += t->headerHeight;
if (PtInRect(&r, pt) == 0)
return rc;
// the row is easy
pt.y -= t->headerHeight;
rc.row = (pt.y / rowht(t)) + t->vscrollpos;
// the column... not so much
// we scroll p.x, then subtract column widths until we cross the left edge of the control
pt.x += t->hscrollpos;
rc.column = 0;
for (i = 0; i < t->nColumns; i++) {
// TODO error check
SendMessage(t->header, HDM_GETITEMRECT, (WPARAM) i, (LPARAM) (&colrect));
pt.x -= colrect.right - colrect.left;
// use <, not <=, here:
// assume r.left and t->hscrollpos == 0;
// given the first column is 100 wide,
// pt.x == 0 (first pixel of col 0) -> p.x - 100 == -100 < 0 -> break
// pt.x == 99 (last pixel of col 0) -> p.x - 100 == -1 < 0 -> break
// pt.x == 100 (first pixel of col 1) -> p.x - 100 == 0 >= 0 -> next column
if (pt.x < r.left)
break;
rc.column++;
}
// TODO what happens if the break was never taken?
return rc;
}
// same as client coordinates, but stored in a lParam (like the various mouse messages provide)
static struct rowcol lParamToRowColumn(struct table *t, LPARAM lParam)
{
POINT pt;
pt.x = GET_X_LPARAM(lParam);
pt.y = GET_Y_LPARAM(lParam);
return clientCoordToRowColumn(t, pt);
}
// returns TRUE if the row is visible and thus has client coordinates; FALSE otherwise
static BOOL rowColumnToClientCoord(struct table *t, struct rowcol rc, POINT *pt)
{
// TODO
}
// TODO idealCoordToRowColumn/rowColumnToIdealCoord?

2
wintable/new/events.h
View File

@ -21,6 +21,7 @@ static const handlerfunc mouseLeaveHandlers[] = {
};
static const handlerfunc lbuttonDownHandlers[] = {
mouseDownSelectHandler,
NULL,
};
@ -28,6 +29,7 @@ static const handlerfunc lbuttonUpHandlers[] = {
NULL,
};
// TODO remove or something? depends on if we implement combobox and how
static const handlerfunc mouseWheelHandlers[] = {
NULL,
};

1
wintable/new/main.c
View File

@ -70,6 +70,7 @@ struct table {
#include "util.h"
#include "coord.h"
#include "select.h"
#include "events.h"
#include "scroll.h"
#include "hscroll.h"

23
wintable/new/select.h Normal file
View File

@ -0,0 +1,23 @@
// 13 december 2014
// damn winsock
static void doselect(struct table *t, intptr_t row, intptr_t column)
{
t->selectedRow = row;
t->selectedColumn = column;
// TODO scroll to ensure the full cell is visible
// TODO redraw only the old and new columns /if there was no scrolling/
InvalidateRect(t->hwnd, NULL, TRUE);
}
// TODO which WM_xBUTTONDOWNs?
HANDLER(mouseDownSelectHandler)
{
struct rowcol rc;
rc = lParamToRowColumn(t, lParam);
// don't check if lParamToRowColumn() returned row -1 or column -1; we want deselection behavior
doselect(t, rc.row, rc.column);
*lResult = 0;
return TRUE;
}