DELPHI实现动态信息显示功能
{
unit : thashmap_unit
class : thashmap
描述 : 哈希表实现工具
}
interface
uses classes, sysutils;
type
thashmap = class
private
m_list_primary : tstringlist;
m_list_keyvalue : tstringlist;
m_list_type : tstringlist;
public
c create();
destructor destroy; override;
{
加入值
可以加入空值,但主键不能为空
}
procedure add(p_str_key : string; p_str_value : string; p_object : tobject = nil);
//删除
procedure remove(p_str_key : string); overload;
procedure remove(p_int_pos : integer); overload;
//全部删除
procedure removeall();
{
获取项目总数,利用此方法可以遍历所有项目,例如:
for i := 1 to obj.getcount() do
begin
m_str := obj.getvalue(i – 1);
…m_str…
end;
}
function getcount() : integer;
{
根据位置信息获取主键名称
}
function getkeyname(p_int_pos : integer) : string;
{
根据主键名导出键值
}
function getvalue(p_str_key : string) : string; overload;
{
根据主键名导出节点数据
}
function getdata(p_str_key : string) : tobject; overload;
{
gettype
返回值 :
0 : 无data
1 ： 有data
}
function gettype(p_str_key : string) : string; overload;
{
根据索引号导出键值
注意此方法索引值为:
0 to getcount() – 1
}
function getvalue(p_int_index : integer) : string; overload;
function gettype(p_int_index : integer) : string; overload;
function getdata(p_int_index : integer) : tobject; overload;
end;
implementation
c thashmap.create();
begin
self.m_list_primary := tstringlist.create;
self.m_list_keyvalue := tstringlist.create;
self.m_list_type := tstringlist.create;
end;
destructor thashmap.destroy();
begin
self.m_list_primary.free;
self.m_list_keyvalue.free;
self.m_list_type.free;
end;
procedure thashmap.add(p_str_key : string; p_str_value : string; p_object : tobject = nil);
var
m_int_pos : integer;
begin
if (trim(p_str_key) = '') then
begin
exit;
end;
m_int_pos := self.m_list_primary.indexof(p_str_key);
if m_int_pos = -1 then
begin
//未重复
self.m_list_primary.add(p_str_key);
self.m_list_keyvalue.addobject(p_str_value, p_object);
end
else
begin
//重复,则替换
self.m_list_keyvalue.strings[m_int_pos] := p_str_key;
self.m_list_keyvalue.objects[m_int_pos] := p_object;
end;
if p_object = nil then
begin
self.m_list_type.add('0');
end
else
begin
self.m_list_type.add('1');
end;
end;
procedure thashmap.remove(p_str_key : string);
var
m_int_pos : integer;
m_obj : tobject;
begin
m_int_pos := self.m_list_primary.indexof(p_str_key);
if m_int_pos <> -1 then
begin
m_obj := self.m_list_keyvalue.objects[m_int_pos];
if m_obj <> nil then
begin
m_obj.free;
end;
self.m_list_primary.delete(m_int_pos);
self.m_list_keyvalue.delete(m_int_pos);
self.m_list_type.delete(m_int_pos);
end;
end;
procedure thashmap.remove(p_int_pos : integer);
var
m_obj : tobject;
begin
if ((p_int_pos < 0) or (p_int_pos > self.getcount())) then
begin
exit;
end;
//删除
m_obj := self.m_list_keyvalue.objects[p_int_pos];
if m_obj <> nil then
begin
//dispose(m_obj);
m_obj.free;
end;
self.m_list_primary.delete(p_int_pos);
self.m_list_keyvalue.delete(p_int_pos);
self.m_list_type.delete(p_int_pos);
end;
procedure thashmap.removeall();
var
i : integer;
m_obj : tobject;
begin
for i := 1 to self.m_list_keyvalue.count do
begin
m_obj := self.m_list_keyvalue.objects[i – 1];
if m_obj <> nil then
begin
m_obj.free;
end;
end;
self.m_list_primary.clear;
self.m_list_keyvalue.clear;
self.m_list_type.clear;
end;
function thashmap.getcount() : integer;
begin
result := self.m_list_primary.count;
end;
function thashmap.getkeyname(p_int_pos : integer) : string;
begin
if ((p_int_pos >= 0) and (p_int_pos < self.getcount)) then
begin
result := self.m_list_primary.strings[p_int_pos];
end
else
begin
result := '';
end;
end;
function thashmap.getvalue(p_str_key : string) : string;
var
m_int_pos : integer;
begin
m_int_pos := self.m_list_primary.indexof(p_str_key);
if m_int_pos = -1 then
begin
result := '';
end
else
begin
result := self.m_list_keyvalue.strings[m_int_pos];
end;
end;
function thashmap.getdata(p_str_key : string) : tobject;
var
m_int_pos : integer;
begin
m_int_pos := self.m_list_primary.indexof(p_str_key);
if m_int_pos = -1 then
begin
result := nil;
end
else
begin
result := self.m_list_keyvalue.objects[m_int_pos];
end;
end;
function thashmap.gettype(p_str_key : string) : string;
var
m_int_pos : integer;
begin
m_int_pos := self.m_list_primary.indexof(p_str_key);
if m_int_pos = -1 then
begin
result := '0';
end
else
begin
result := self.m_list_type.strings[m_int_pos];
end;
end;
function thashmap.getvalue(p_int_index : integer) : string;
begin
if ((p_int_index >= 0) and (p_int_index < self.getcount)) then
begin
result := self.m_list_keyvalue.strings[p_int_index];
end
else
begin
result := '';
end;
end;
function thashmap.gettype(p_int_index : integer) : string;
begin
if ((p_int_index >= 0) and (p_int_index < self.getcount)) then
begin
result := self.m_list_type.strings[p_int_index];
end
else
begin
result := '';
end;
end;
function thashmap.getdata(p_int_index : integer) : tobject;
begin
if ((p_int_index >= 0) and (p_int_index < self.getcount)) then
begin
result := self.m_list_keyvalue.objects[p_int_index];
end
else
begin
result := nil;
end;
end;
end.
{
unit : tinfopanel_unit
class : tinfopanel
描述 : 信息载体
设计者 : sunny
生成日期 : 20060802
}
interface
uses forms, thashmap_unit, classes, c stdctrls, sysutils;
type
tinfopanel = class(tscrollbox)
private
m_comp : tlist;
m_comp : tlist;
m_hash : thashmap;
m_int_left : integer; //左边界位置
m_int_top : integer; //上边界位置
m_int_labelwidth : integer; //label宽度
m_int_valuewidth : integer; //值域宽度
m_int_rowheight : integer; //每条记录高度
m_int_rowtorow : integer; //每两个记录之间的隔断距离
m_int_coltocol : integer; //每个记录label和value之间的距离
public
c create(aowner: tcomp override;
destructor destroy; override;
//talign = (aln altop, albottom, alleft, alright, alclient, alcustom);
procedure setposandsize(p_int_left, p_int_top, p_int_width, p_int_height : integer; p_alg : talign = aln
{
设置和获取哈希表对象
}
procedure sethashmap(p_hash : thashmap);
function gethashmap() : thashmap;
{
获取更新后的哈希表
获取控件值
用户根据返回值是否为空判断用户输入是否有空值
此功能的初忠是用于将用户更改操作后的数据存储到数据库中
}
function restorhashmap() : thashmap;
{
设置显示每条记录时的尺寸
}
procedure setleft(p_int_left : integer);
procedure settop(p_int_top : integer);
procedure setlabelwidth(p_int_width : integer);
procedure setvaluewidth(p_int_width : integer);
procedure setrowheight(p_int_height : integer);
procedure setrowtorow(p_int_rowtorow : integer);
procedure setcoltocol(p_int_coltocol : integer);
{
释放已有的对象列表
}
procedure destroycomp
{
生成显示信息
}
procedure updateinfomati
end;
implementation
c tinfopanel.create(aowner: tcomp
begin
inherited create(aowner);
m_comp := tlist.create;
m_comp := tlist.create;
m_int_left := 2; //左边界位置
m_int_top := 10; //上边界位置
m_int_labelwidth := 80; //label宽度
m_int_valuewidth := 80; //值域宽度
m_int_rowheight := 20; //每条记录高度
m_int_rowtorow := 50; //行间隔
m_int_coltocol := 10; //列间隔
end;
destructor tinfopanel.destroy();
begin
m_components_label.free;
m_components_edit.free;
if self.m_hash <> nil then
begin
self.m_hash.free;
end;
inherited destroy;
end;
procedure tinfopanel.setposandsize(p_int_left, p_int_top, p_int_width, p_int_height : integer; p_alg : talign = aln
begin
self.align := p_alg;
self.left := p_int_left;
self.top := p_int_top;
self.width := p_int_width;
self.height := p_int_height;
end;
procedure tinfopanel.sethashmap(p_hash : thashmap);
begin
self.m_hash := p_hash;
end;
function tinfopanel.gethashmap() : thashmap;
begin
result := self.m_hash;
end;
function tinfopanel.restorhashmap() : thashmap;
var
i : integer;
m_hash : thashmap;
begin
m_hash := thashmap.create;
for i := 1 to self.m_components_label.count do
begin
if trim(tobject(self.m_components_edit.items[i – 1]).classname) = 'tedit' then
begin
m_hash.add(tlabel(self.m_components_label.items[i – 1]).capti tedit(self.m_components_edit.items[i – 1]).text);
end
else
begin
m_hash.add(tlabel(self.m_components_label.items[i – 1]).capti tcombobox(self.m_components_edit.items[i – 1]).text);
end;
end;
result := m_hash;
end;
procedure tinfopanel.setleft(p_int_left : integer);
begin
self.m_int_left := p_int_left;
end;
procedure tinfopanel.settop(p_int_top : integer);
begin
self.m_int_top := p_int_top;
end;
procedure tinfopanel.setlabelwidth(p_int_width : integer);
begin
self.m_int_labelwidth := p_int_width;
end;
procedure tinfopanel.setvaluewidth(p_int_width : integer);
begin
self.m_int_valuewidth := p_int_width;
end;
procedure tinfopanel.setrowheight(p_int_height : integer);
begin
self.m_int_rowheight := p_int_height;
end;
procedure tinfopanel.setrowtorow(p_int_rowtorow : integer);
begin
self.m_int_rowtorow := p_int_rowtorow;
end;
procedure tinfopanel.setcoltocol(p_int_coltocol : integer);
begin
self.m_int_coltocol := p_int_coltocol;
end;
procedure tinfopanel.destroycomp
var
i : integer;
obj : pointer;
begin
if self.m_comp = nil then
begin
exit;
end;
for i := self.m_components_label.count downto 1 do
begin
obj := self.m_comp – 1];
dispose(obj);
end;
for i := self.m_components_edit.count downto 1 do
begin
obj := self.m_comp – 1];
dispose(obj);
end;
end;
procedure tinfopanel.updateinfomati
var
i : integer;
j : integer;
m_str_label : string;
m_str_value : string;
m_str_type : string;
m_lab : tlabel;
m_edt : tedit;
m_cob : tcombobox;
m_list : tstringlist;
begin
if self.m_hash = nil then
begin
exit;
end;
//clear comp list
self.destroycomp
for i := 1 to self.m_hash.getcount() do
begin
m_str_label := self.m_hash.getkeyname(i – 1);
m_str_value := self.m_hash.getvalue(i – 1);
m_str_type := self.m_hash.gettype(i – 1);
//create label
m_lab := tlabel.create(nil);
m_lab.parent := self;
m_lab.caption := m_str_label;
m_lab.left := self.m_int_left;
m_lab.top := self.m_int_top + (i – 1) * self.m_int_rowheight + (i – 1) * self.m_int_rowtorow + 7; //标题向下7个像素偏移
m_lab.width := self.m_int_labelwidth;
m_lab.height := self.m_int_rowheight;
m_lab.visible := true;
//create edit or combobox
if trim(m_str_type) = '1' then
begin
//create combobox
m_cob := tcombobox.create(nil);
m_cob.parent := self;
m_cob.left := self.m_int_left + self.m_int_labelwidth + self.m_int_coltocol;
m_cob.top := self.m_int_top + (i – 1) * self.m_int_rowheight + (i – 1) * self.m_int_rowtorow;
m_cob.width := self.m_int_valuewidth;
m_cob.height := self.m_int_rowheight;
m_cob.visible := true;
m_list := tstringlist(self.m_hash.getdata(i – 1));
for j := 1 to m_list.count do
begin
m_cob.items.add(m_list.strings[j – 1]);
end;
m_cob.text := m_str_value;
self.m_components_edit.add(m_cob);
end
else
begin
//create edit
m_edt := tedit.create(nil);
m_edt.parent := self;
m_edt.text := m_str_value;
m_edt.left := self.m_int_left + self.m_int_labelwidth + self.m_int_coltocol;
m_edt.top := self.m_int_top + (i – 1) * self.m_int_rowheight + (i – 1) * self.m_int_rowtorow;
m_edt.width := self.m_int_valuewidth;
m_edt.height := self.m_int_rowheight;
m_edt.visible := true;
self.m_components_edit.add(m_edt);
end;
self.m_components_label.add(m_lab);
end;
end;
end.
实现调用：
m_hash : thashmap;
m_list : tstringlist;
begin
m_list := tstringlist.create;
m_list.add('1');
m_list.add('2');
m_list.add('3');
m_list.add('name4');
m_infopanel := tinfopanel.create(nil);
m_hash := thashmap.create;
m_hash.add('1sdfasdfasdfas', 'name1');
m_hash.add('2dffffes', 'name2');
m_hash.add('3', 'name3');
m_hash.add('4', 'name4', m_list);
m_hash.add('5', 'name5');
m_hash.add('6', 'name6');
m_infopanel.sethashmap(m_hash);
m_infopanel.setposandsize(100, 100, 300, 150, aln
m_infopanel.setrowtorow(10);
m_infopanel.setleft(30);
m_infopanel.setrowheight(22);
m_infopanel.color := clred;
m_infopanel.parent := self;
m_infopanel.updateinfomati
end;
