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// 28 july 2014
package ui
import (
"fmt"
"unsafe"
"reflect"
)
// #include "winapi_windows.h"
import "C"
type table struct {
*tablebase
_hwnd C.HWND
noautosize bool
colcount C.int
hotrow C.int
hotcol C.int
pushedrow C.int
pushedcol C.int
selected *event
}
func finishNewTable(b *tablebase, ty reflect.Type) Table {
t := &table{
_hwnd: C.newControl(C.xWC_LISTVIEW,
C.LVS_REPORT | C.LVS_OWNERDATA | C.LVS_NOSORTHEADER | C.LVS_SHOWSELALWAYS | C.LVS_SINGLESEL | C.WS_HSCROLL | C.WS_VSCROLL | C.WS_TABSTOP,
C.WS_EX_CLIENTEDGE), // WS_EX_CLIENTEDGE without WS_BORDER will show the canonical visual styles border (thanks to MindChild in irc.efnet.net/#winprog)
tablebase: b,
hotrow: -1,
hotcol: -1,
pushedrow: -1,
pushedcol: -1,
selected: newEvent(),
}
C.setTableSubclass(t._hwnd, unsafe.Pointer(t))
// LVS_EX_FULLROWSELECT gives us selection across the whole row, not just the leftmost column; this makes the list view work like on other platforms
// LVS_EX_SUBITEMIMAGES gives us images in subitems, which will be important when both images and checkboxes are added
C.tableAddExtendedStyles(t._hwnd, C.LVS_EX_FULLROWSELECT | C.LVS_EX_SUBITEMIMAGES)
C.tableSetCheckboxImageList(t._hwnd)
for i := 0; i < ty.NumField(); i++ {
C.tableAppendColumn(t._hwnd, C.int(i), toUTF16(ty.Field(i).Name))
}
t.colcount = C.int(ty.NumField())
return t
}
func (t *table) Unlock() {
t.unlock()
// there's a possibility that user actions can happen at this point, before the view is updated
// alas, this is something we have to deal with, because Unlock() can be called from any thread
go func() {
Do(func() {
t.RLock()
defer t.RUnlock()
C.tableUpdate(t._hwnd, C.int(reflect.Indirect(reflect.ValueOf(t.data)).Len()))
})
}()
}
func (t *table) LoadImageList(il ImageList) {
il.apply(t._hwnd, C.LVM_SETIMAGELIST, C.LVSIL_SMALL)
}
func (t *table) Selected() int {
t.RLock()
defer t.RUnlock()
return int(C.tableSelectedItem(t._hwnd))
}
func (t *table) Select(index int) {
t.RLock()
defer t.RUnlock()
C.tableSelectItem(t._hwnd, C.intptr_t(index))
}
func (t *table) OnSelected(f func()) {
t.selected.set(f)
}
//export tableGetCell
func tableGetCell(data unsafe.Pointer, item *C.LVITEMW) {
t := (*table)(data)
t.RLock()
defer t.RUnlock()
d := reflect.Indirect(reflect.ValueOf(t.data))
datum := d.Index(int(item.iItem)).Field(int(item.iSubItem))
// TODO figure out why changing item.mask causes crashes or why "it just works"
switch {
case datum.Type() == reflect.TypeOf(ImageIndex(0)):
item.iImage = C.int(datum.Interface().(ImageIndex))
case datum.Kind() == reflect.Bool:
item.stateMask = C.LVIS_STATEIMAGEMASK
// state image index is 1-based
curstate := ((item.state & C.LVIS_STATEIMAGEMASK) >> 12)
if curstate > 0 {
curstate--
}
if datum.Bool() == true {
curstate |= C.checkboxStateChecked
} else {
curstate &^= C.checkboxStateChecked
}
if item.iItem == t.hotrow && item.iSubItem == t.hotcol {
curstate |= C.checkboxStateHot
} else {
curstate &^= C.checkboxStateHot
}
if item.iItem == t.pushedrow && item.iSubItem == t.pushedcol {
curstate |= C.checkboxStatePushed
} else {
curstate &^= C.checkboxStatePushed
}
item.state = (curstate + 1) << 12
default:
s := fmt.Sprintf("%v", datum)
item.pszText = toUTF16(s)
}
}
// the column autoresize policy is simple:
// on every table.commitResize() call, if the columns have not been resized by the user, autoresize
func (t *table) autoresize() {
t.RLock()
defer t.RUnlock()
if !t.noautosize {
C.tableAutosizeColumns(t._hwnd, t.colcount)
}
}
//export tableStopColumnAutosize
func tableStopColumnAutosize(data unsafe.Pointer) {
t := (*table)(data)
t.noautosize = true
}
//export tableColumnCount
func tableColumnCount(data unsafe.Pointer) C.int {
t := (*table)(data)
return t.colcount
}
//export tableSetHot
func tableSetHot(data unsafe.Pointer, row C.int, col C.int) {
t := (*table)(data)
redraw := (row != t.hotrow || col != t.hotcol)
t.hotrow = row
t.hotcol = col
if redraw {
C.tableUpdate(t._hwnd, C.int(reflect.Indirect(reflect.ValueOf(t.data)).Len()))
}
}
//export tablePushed
func tablePushed(data unsafe.Pointer, row C.int, col C.int) {
t := (*table)(data)
t.pushedrow = row
t.pushedcol = col
C.tableUpdate(t._hwnd, C.int(reflect.Indirect(reflect.ValueOf(t.data)).Len()))
}
//export tableToggled
func tableToggled(data unsafe.Pointer, row C.int, col C.int) {
t := (*table)(data)
t.Lock()
defer func() {
// reset for next time
t.pushedrow = -1
t.pushedcol = -1
// and THEN unlock so the reset takes effect
t.Unlock()
}()
if row == -1 || col == -1 { // discard extras sent by handle() in table_windows.c
return
}
if row != t.pushedrow || col != t.pushedcol { // mouse moved out
return
}
d := reflect.Indirect(reflect.ValueOf(t.data))
datum := d.Index(int(row)).Field(int(col))
if datum.Kind() == reflect.Bool {
datum.SetBool(!datum.Bool())
return
}
panic(fmt.Errorf("tableSetHot() on non-checkbox at (%d, %d)", row, col))
}
//export tableSelectionChanged
func tableSelectionChanged(data unsafe.Pointer) {
t := (*table)(data)
t.selected.fire()
}
func (t *table) hwnd() C.HWND {
return t._hwnd
}
func (t *table) setParent(p *controlParent) {
basesetParent(t, p)
}
func (t *table) allocate(x int, y int, width int, height int, d *sizing) []*allocation {
return baseallocate(t, x, y, width, height, d)
}
const (
// from C++ Template 05 in http://msdn.microsoft.com/en-us/library/windows/desktop/bb226818%28v=vs.85%29.aspx as this is the best I can do for now
// there IS a message LVM_APPROXIMATEVIEWRECT that can do calculations, but it doesn't seem to work right when asked to base its calculations on the current width/height on Windows and wine...
tableWidth = 183
tableHeight = 50
)
func (t *table) preferredSize(d *sizing) (width, height int) {
return fromdlgunitsX(tableWidth, d), fromdlgunitsY(tableHeight, d)
}
func (t *table) commitResize(a *allocation, d *sizing) {
basecommitResize(t, a, d)
t.RLock()
defer t.RUnlock()
t.autoresize()
}
func (t *table) getAuxResizeInfo(d *sizing) {
basegetAuxResizeInfo(t, d)
}
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