263 lines
7.1 KiB
Go
263 lines
7.1 KiB
Go
// 28 july 2014
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package ui
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import (
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"fmt"
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"unsafe"
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"reflect"
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)
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// #include "winapi_windows.h"
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import "C"
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type table struct {
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*tablebase
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_hwnd C.HWND
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noautosize bool
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colcount C.int
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hotrow C.int
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hotcol C.int
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pushedrow C.int
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pushedcol C.int
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selected *event
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}
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func finishNewTable(b *tablebase, ty reflect.Type) Table {
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t := &table{
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_hwnd: C.newControl(C.xWC_LISTVIEW,
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C.LVS_REPORT | C.LVS_OWNERDATA | C.LVS_NOSORTHEADER | C.LVS_SHOWSELALWAYS | C.LVS_SINGLESEL | C.WS_HSCROLL | C.WS_VSCROLL | C.WS_TABSTOP,
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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)
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tablebase: b,
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hotrow: -1,
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hotcol: -1,
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pushedrow: -1,
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pushedcol: -1,
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selected: newEvent(),
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}
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C.setTableSubclass(t._hwnd, unsafe.Pointer(t))
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// 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
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// LVS_EX_SUBITEMIMAGES gives us images in subitems, which will be important when both images and checkboxes are added
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C.tableAddExtendedStyles(t._hwnd, C.LVS_EX_FULLROWSELECT | C.LVS_EX_SUBITEMIMAGES)
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// this must come after the subclass because it uses one of our private messages
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C.SendMessageW(t._hwnd, C.msgTableMakeInitialCheckboxImageList, 0, 0)
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for i := 0; i < ty.NumField(); i++ {
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C.tableAppendColumn(t._hwnd, C.int(i), toUTF16(ty.Field(i).Name))
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}
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t.colcount = C.int(ty.NumField())
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return t
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}
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func (t *table) Unlock() {
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t.unlock()
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// there's a possibility that user actions can happen at this point, before the view is updated
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// alas, this is something we have to deal with, because Unlock() can be called from any thread
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go func() {
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Do(func() {
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t.RLock()
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defer t.RUnlock()
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C.tableUpdate(t._hwnd, C.int(reflect.Indirect(reflect.ValueOf(t.data)).Len()))
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})
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}()
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}
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func (t *table) LoadImageList(il ImageList) {
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il.apply(t._hwnd, C.msgLoadImageList)
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}
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func (t *table) Selected() int {
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t.RLock()
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defer t.RUnlock()
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return int(C.tableSelectedItem(t._hwnd))
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}
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func (t *table) Select(index int) {
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t.RLock()
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defer t.RUnlock()
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C.tableSelectItem(t._hwnd, C.intptr_t(index))
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}
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func (t *table) OnSelected(f func()) {
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t.selected.set(f)
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}
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func printMask(item *C.LVITEMW) {
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fmt.Printf("%d %d ", item.iItem, item.iSubItem)
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x := item.mask
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if x&C.LVIF_COLUMNS != 0{ fmt.Print("LVIF_COLUMNS ") }
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if x&C.LVIF_DI_SETITEM != 0{ fmt.Print("LVIF_DI_SETITEM ") }
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if x&C.LVIF_GROUPID != 0{ fmt.Print("LVIF_GROUPID ") }
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if x&C.LVIF_IMAGE != 0{ fmt.Print("LVIF_IMAGE ") }
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if x&C.LVIF_INDENT != 0{ fmt.Print("LVIF_INDENT ") }
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if x&C.LVIF_NORECOMPUTE != 0{ fmt.Print("LVIF_NORECOMPUTE ") }
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if x&C.LVIF_PARAM != 0{ fmt.Print("LVIF_PARAM ") }
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if x&C.LVIF_STATE != 0{ fmt.Print("LVIF_STATE ") }
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if x&C.LVIF_TEXT != 0{ fmt.Print("LVIF_TEXT ") }
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fmt.Print("\n")
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}
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//export tableGetCell
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func tableGetCell(data unsafe.Pointer, item *C.LVITEMW) {
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t := (*table)(data)
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t.RLock()
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defer t.RUnlock()
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d := reflect.Indirect(reflect.ValueOf(t.data))
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datum := d.Index(int(item.iItem)).Field(int(item.iSubItem))
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printMask(item)
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isText := true
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if item.mask & C.LVIF_IMAGE != 0 {
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if datum.Type() == reflect.TypeOf(ImageIndex(0)) {
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item.iImage = C.int(datum.Interface().(ImageIndex))
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isText = false
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}
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// else let the default behavior work
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}
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if item.mask & C.LVIF_INDENT != 0 {
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// always have an indent of zero
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item.iIndent = 0
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}
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if item.mask & C.LVIF_STATE != 0 {
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// start by not changing any state
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item.stateMask = 0
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if datum.Kind() == reflect.Bool {
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item.stateMask = C.LVIS_STATEIMAGEMASK
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// state image index is 1-based
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curstate := ((item.state & C.LVIS_STATEIMAGEMASK) >> 12)
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if curstate > 0 {
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curstate--
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}
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if datum.Bool() == true {
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curstate |= C.checkboxStateChecked
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} else {
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curstate &^= C.checkboxStateChecked
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}
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if item.iItem == t.hotrow && item.iSubItem == t.hotcol {
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curstate |= C.checkboxStateHot
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} else {
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curstate &^= C.checkboxStateHot
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}
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if item.iItem == t.pushedrow && item.iSubItem == t.pushedcol {
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curstate |= C.checkboxStatePushed
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} else {
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curstate &^= C.checkboxStatePushed
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}
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item.state = (curstate + 1) << 12
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isText = false
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}
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}
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if item.mask & C.LVIF_TEXT != 0 {
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if isText {
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s := fmt.Sprintf("%v", datum)
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item.pszText = toUTF16(s)
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}
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// else let the default handler work
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}
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}
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// the column autoresize policy is simple:
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// on every table.commitResize() call, if the columns have not been resized by the user, autoresize
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func (t *table) autoresize() {
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t.RLock()
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defer t.RUnlock()
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if !t.noautosize {
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C.tableAutosizeColumns(t._hwnd, t.colcount)
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}
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}
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//export tableStopColumnAutosize
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func tableStopColumnAutosize(data unsafe.Pointer) {
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t := (*table)(data)
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t.noautosize = true
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}
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//export tableColumnCount
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func tableColumnCount(data unsafe.Pointer) C.int {
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t := (*table)(data)
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return t.colcount
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}
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//export tableSetHot
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func tableSetHot(data unsafe.Pointer, row C.int, col C.int) {
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t := (*table)(data)
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redraw := (row != t.hotrow || col != t.hotcol)
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t.hotrow = row
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t.hotcol = col
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if redraw {
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C.tableUpdate(t._hwnd, C.int(reflect.Indirect(reflect.ValueOf(t.data)).Len()))
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}
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}
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//export tablePushed
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func tablePushed(data unsafe.Pointer, row C.int, col C.int) {
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t := (*table)(data)
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t.pushedrow = row
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t.pushedcol = col
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C.tableUpdate(t._hwnd, C.int(reflect.Indirect(reflect.ValueOf(t.data)).Len()))
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}
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//export tableToggled
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func tableToggled(data unsafe.Pointer, row C.int, col C.int) {
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t := (*table)(data)
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t.Lock()
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defer func() {
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// reset for next time
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t.pushedrow = -1
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t.pushedcol = -1
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// and THEN unlock so the reset takes effect
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t.Unlock()
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}()
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if row == -1 || col == -1 { // discard extras sent by handle() in table_windows.c
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return
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}
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if row != t.pushedrow || col != t.pushedcol { // mouse moved out
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return
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}
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d := reflect.Indirect(reflect.ValueOf(t.data))
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datum := d.Index(int(row)).Field(int(col))
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if datum.Kind() == reflect.Bool {
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datum.SetBool(!datum.Bool())
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return
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}
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panic(fmt.Errorf("tableSetHot() on non-checkbox at (%d, %d)", row, col))
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}
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//export tableSelectionChanged
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func tableSelectionChanged(data unsafe.Pointer) {
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t := (*table)(data)
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t.selected.fire()
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}
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func (t *table) hwnd() C.HWND {
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return t._hwnd
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}
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func (t *table) setParent(p *controlParent) {
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basesetParent(t, p)
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}
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func (t *table) allocate(x int, y int, width int, height int, d *sizing) []*allocation {
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return baseallocate(t, x, y, width, height, d)
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}
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const (
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// 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
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// 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...
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tableWidth = 183
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tableHeight = 50
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)
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func (t *table) preferredSize(d *sizing) (width, height int) {
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return fromdlgunitsX(tableWidth, d), fromdlgunitsY(tableHeight, d)
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}
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func (t *table) commitResize(a *allocation, d *sizing) {
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basecommitResize(t, a, d)
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t.RLock()
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defer t.RUnlock()
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t.autoresize()
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}
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func (t *table) getAuxResizeInfo(d *sizing) {
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basegetAuxResizeInfo(t, d)
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}
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